water coming out of spark plug hole outboard. Set the outboard engine to an upright position. 1) Worn Valve Cover Gasket · 2) Old Valve Guide Seals · 3) Bad O-Rings · 4) Bad Piston · 5) Bad Piston Rings . When you pull the cooling cover off, you will see a big square o-ring and a small round o-ring just around the spark plug. I need to know what else to check to diagnose this problem. If your standing in the boat water is coming from the top right plug only. G’day Jacob, the plate between the engine block and the leg has what’s called a sandwich plate which houses the water pump “pick up tube” they are well known for corroding and very little water will reach the powerhead, the thermostat location is at the top of the head above the spark plugs!. If the plug ring is wasted, it is a safe bet to guess that the big one is too. the temperature gage has not read overheat. Around the spark plug holes, there are O-rings, which can be external or integrated with the valve cover gasket. I do not believe that the motor over heated when this issue first began. If the output becomes blocked, it will disrupt water flow throughout the entire engine. They are plain and basic but effortless and efficient. when everything is totally dry, put everything together and start. I have no evidence of coolant coming out of the exhaust, my entire issue is. What could cause this? Head gasket go bad while sitting or something more complicated. 1) Place the outboard in an area with good drainage. Check the spark plug for damage. Repeat this step a couple of times. Does Your Yamaha Outboard Head Gasket Need to be Repaired. Add a fresh set of spark plugs, change the oil and filter on a four-stroke, then add gas and get the engine started. I have water leaking from my upper spark plug on my. Water is forcing its way between the spark plug threads and the motor housing. Last night, I removed all of the spark plug wires/boots, cleaned the area of excessive rust (yeah, I knowingly poured water back. The bottom bolts can be hard to get at but it can be done, If this is a real old engine the bolts holding it on will have nuts on them also,spray with a good penetrating fluid and lets soak before breaking them loose. Shouldn't be too much of an issue. Most often fouled spark plugs are noticed when the engine […] One of the most common issues with two cycle outboard motors occurs when the spark plugs become saturated with gasoline, and foul out. If water is only misting/spitting out of your back port. Problem is after about 10-15 seconds of running great, it died, and I noticed the back spark plug popped out. seems the spark has a path to ground that does not include the electrode of. When the boat is out of the water, I also monitor the water coming out of the discharge port on the drive. What happens when water gets in spark plugs?. Although the leak can sometimes be fixed by tightening the valve cover bolts, more often than not the valve cover gasket and well seals will need to be replaced. Pour methylated spirits into each of the carburettor throats and turn the engine over by hand. This is gas as it has a strong gas smell and when I put a papertowel over the spark plug. through the spark plug terminal at the outer end of the plug, as shown in Figure 5. Re: 402 water coming out spark plug hole The exhaust gaskets and base gasket JB mentions total less than 10 bucks at a Merc dealer - so that and an hour of your time and you can replace them. Take a thin piece of wire and run it through the output. 2: Use a Compression Gauge Hose. With the majority of outboard motors, there is a water output. Re: Fuel coming out of spark plug holes. If this is your first visit, be sure to check out the FAQ by clicking the . Install a new lower unit drain gasket onto your upper screw plug. Water-jacket flush adapter Here the flusher in use verifying water to the tell tale hole. Use a socket and wrench to remove the spark plug, or multiple spark plug wires from the tops of the spark plugs. But besides that, you’ve probably got bigger problems, because water shouldn’t ever get to the business end of your spark plugs — the end inside the combustion chamber. posted 06-19-2007 09:58 PM ET (US) No water came out of the engine pee-hole when I cranked up my outboard last Sunday. Being in the market for such a long time, they are the most reliable producers out there. Also know, where should water come out on an outboard motor? Water is drawn into the water pump through the intake opening of the lower unit, where it passes through a cavity that ends up entering the pump itself. Answer (1 of 2): “What happens when water gets in spark plugs?” They get wet. The water coming in from the exhaust cover gets compressed by your piston, which turns it to gas- this extra Oxygen in your gas/oil mix makes the explosion too hot which will melt your piston(s) crown. Tip: If water should stop flowing from the telltale hole on your outboard, or if the stream becomes weak, carefully check the outlet tubing for obstructions. To check for blockage, run a small, thin segment of wire up the output tube and gently wiggle it side to side to dislodge any debris. Search: Mercury Outboard Water Pump Replacement Video. Water leaking into #4 sparkplug (what's the fix)?. water is getting into the engine the first thing to do is remove the spark plugs and see if any water comes out of the spark plug holes. Water Pump: long time until water comes out pee hole. outboard in vertical (down) position in a well ventilated area. If you have an electric motor, you may need another person to crank the engine over while you twist your throttle position open. However I recently noticed oil residue coming from each of the 4 spark plug holes. After having pumped out the water from the spark plug wells and re-installing the spark plug boots, the car ran well for the most part, but it started intermittently hesitating and missing again in the next two days. I removed the lower unit-pump housing looks fine. I've looked at some old posts and put the thermostat in boiling water and it opened. Bought tune up parts cause was in a hurry. Next, lift up the lower unit as much as possible to avoid sucking the oil out. Long story short, I removed the spark plugs and found water coming out of one of the spark plug connection holes. Heavy rust or a white-tan accumulation on the electrode indicates water in the cylinder, resulting from a cracked cylinder or blown head gasket. Last week, someone mentioned that their outboard was not discharching water out of the pee hole. If there is a Honda outboard motor dealer nearby, take the outboard motor immediately to the dealer. In either case, make sure that the engine has been warmed up to at least 60° so that the oil will be less viscous and will drain more effectively. The spark plug wires run from the drivers side of the engine to the spark plug so just follow the wires to each of the spark plug locations. (can get one at an auto parts store) 3. Just had to put on a new head due to stripped spark plug holes. I don’t recall ever seeing a 4. You'll have to remove the jacket, be careful some bolts will want to . 2005 Yamaha F225TXRD Water on spark plug. 4hp 4 stroke Yamaha Outboard (oil coming out of spark plug. About Water Outboard Video Mercury Replacement Pump. Missing items got from Crowley. Prob they are there to avoid backpressure. I ran the engine on the hose today and looked around for water leaking. With the lower screw in your hand, remove the gear oil pump fitting. It looks like a leaking water jacket cover. Enough to make a gurgling sound as it ran into the cyl when I removed the plug. Apr 29, 2009 · 2003 Yamaha outboard 2 stroke overheat buzzer on idle, 2003 Yamaha outboard 2 stroke overheat buzzer on idle , flushed and cleaned water jackets and replaced thermostats, water coming out of pee hole. (most likely) If the motor was stored outside and tilted up and the water jacket couldn't drain, he could have a crack between the water jacket and the head. You HAVE to get that water out of there ASAP. Some mechanics, when finding water on a spark-plug electrode, . Any wetness on the electrode that does not smell of gas or oil. Except there was no water streaming out of the pee. I am willing to bet the water is seeping from between the seal between those two pieces. Install a new lower unit drain gasket on your lower screw. Yamaha outboard no water through tell tail. When the oil on your spark plug looks like this, and there is oil on the spark plug threads, it is not coming from the engine's inside; it is actually coming from the outside from the valve cover, filling up the wells. This engine design places the spark-plugs down inside deep wells in the cylinder heads. I changed the spark plugs at 33k and found water around the spark plug in the #3 cyl. As other ConWavers have suggested, before calling a mechanic I removed the engine cowling. It has been sitting all winter. There are O-Ring seals at the bottom of the spark plug wells. Help - D2 V8 water coming out of spark plug hole Hi all, My 02 Disc V8 had an overheating misfortune, so I replaced the thermostat and hoses, but kept over heating, so I pulled the heads of and had them resurfaced ( which the cylinder head guy said had no cracking) and also fitted a new radiator,. So we took the spark plugs out and turned the motor over and pushed all the water out. A loose spark plug, especially one that is held in above with an ignition coil can vibrate and damage aluminum threads. The tell-tale signs of a blown head gasket are water/coolant getting into the engine oil, making it appear milky, and smoke/steam coming out of the exhaust pipe. It's not that difficult to isolate the source. When a spark plug well fills with oil, it means that the O-ring that seals the well to keep out oil and debris has deteriorated and started to leak. Ground the coil high-tension wire, then crank the engine over to purge any water out of the cylinders. if your up to it - carefully remove the bolts in fact spray them good with penetrating oil a day ahead - even so i snapped 4 and had to. I agree with this make sure all the plugs are out or you can bend a rod. The only clue that i saw was that when. Remove the spark plugs and inspect them for signs of water. Look carefully at the electrodes on the plug tips. #1 '98 115hp 2stroke Oil leak from spark plugs 04-10-2016, 01:41 PM 1998 115hp 2 stroke oil injected Bought this engine a few months ago, runs great and is in incredible condition for its age. As of today, I turned the motor on and it ran smoothly. If it’s a Briggs, try putting oil in it first, then remove the spark plug and spray a liberal amount of WD 40 in there When the engine would seize up, all we ever had to do was put oil back in the case, spray a little WD-40 in the spark plug, and hit the blade a few times with a hammer to get it starting to turn. Mine will run fine for weeks and then. Unless there is a partial obstruction somewhere. By Jim DeWolfe in forum Honda Outboard Forum Replies: 14 Last Post: 10-18-2011, 01:19 PM. Asked by Trishia2 in Pell City, AL on November 21, 2014. You can also tell if the head gasket, or exhaust gasket is leaking by removing the spark plugs, and if one of them is leaking, water will come out of the plug holes. Water pump, t-stats and fuel filter were much more affordable and spark plugs were $7 cheaper. At that point, the impeller pressures the water into the long inlet tube leading to the bottom side of the powerhead. I know not to turn the water on without the engine running and to shut the water off before the engine, and to thrust the throttle it a few times without the water on to get water out. Plug is in finger tight plus a bit more for tightness. It originates at a small hole, just under the right . *There is not water in the oil. pools of water in the holes where the spark plugs live. I had a 2000 Grand Marquis, among others. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. Gasoline Engines and Water Intrusion. water leaking from inside engine cowling. I have replaced the thermostat and water pump. This small tube can easily become blocked. the plug, and the result is the misfire reports. Hereof, can you start an inboard outboard out of water? Turn on the garden hose all the way to confirm that there is a solid flow of water, then turn it off for now. So just showing yall what its doing. The water would just spew out of the pee hole like crazy with a bunch of pressure and it comes from the exhaust plate/s. Thread the lower unit pump tip into the bottom plug hole. (This plug was on the point of being thrown away. 4hp 4 stroke Yamaha Outboard (oil coming out of spark plug hole) 2003 Honda 9. Screw your compression gauge hose to the hole of the spark plug. Between the two is space for water to go through. 50 horse tiller Yamaha 4 stroke went to start it up and no water coming out I think it could be the impeller. But if coolant finds its way into the wells, engine misfire is sure to occur and in many cases the coils, there are 8 of them, will be damaged and will need to be replaced at $90 a pop…. I noticed I have water coming out of the pee hole but no water coming out of the thermostat hole below that. You may also need to re charge your battery if it dies. Sounds like that spark plug is loose - needs to be finger tight and then 1/3 turn more. Maybe the high pressure combined with extra heat from thermostat not opening correctly might have caused a leak on the exhaust plate apparatus if there is one. Topic: Tip for fouled outboard pee-hole - no repair required. And the outboards come with usually a long warranty time. Take your plugs off and crank the engine until you don't get anymore water shooting out of the . Bought from local Evinrude Dealer. Water Coming Out of a Spark Plug Hole; Black Specks, Crud, and Slime in the Cylinder; Idle Runs Too Slow or Rough; Holes In the Head Gasket. If so the answer is no to water coming out of the holes. I recently noticed a dribble of (water/coolant?) down the right front side of my engine. Water was spitting out of a couple places in the lower unit before I started the engine. Spark plugs show an oily appearance with moderate carbon caked on the thread ends. by yareelohim » 02 May 2013, 07:00. That much water pouring out at idle indicates the thermostat or poppet valve is stuck open. I do see water coming out of a hole of the lower unit opposite side of the prop. In fact, I had a 1999 Grand Marquis that had the intake manifold crack at the back where one of the heater hoses came out. Idled it for about ten minutes and found no water. Check the spark plugs' gaps with a gap gauge, and clean them with a wire brush. You'll have to remove the water jacket, replace seal, and install a new impeller. I don't use open throttle much and the fouling on the centre electrode starts to cause tracking and poor running. What is causing the water to leak out, and it is an expensive rep 1991 Mariner 40 hp -Water leaking from top spark plug! Motor runs great, but can be a bit tough to start, even when it has been recently run. In case you cannot find the spark, there are two easy ways to deal with spark plugs. The methylated spirits will travel through the inside of the engine and come out of the spark plug holes. Motor runs great, but can be a bit tough to start, even when it has been recently run. This is on my 1998 sea ray with a merc 125. I have a 2007 DF175 4 stroke that has about 20 original hours. Remove one of the spark plugs and install a compression guage in it's place. Thanks C cell Petty Officer 1st Class Joined Apr 16, 2009 Messages 208. Methylated spirits will absorb some of the fresh water that is still inside the engine. Motor ran fine after that for the rest of the day. immediately after it is recovered from the water in order to minimize corrosion. Start by draining the lower unit first. The spark plug boots attempt to seal the openings. Most Common Problems With Honda 4 Stroke Outboard. So I assume the plugging up the two drain holes in the cowl lip may have fixed the problem. I’d recommend getting yourself a spark plug tester. Oil Leak In Spark Plug Well. Inboard or outboard motors? Is it seawater or fresh water that is leaking out? Inboard, check for stuffing box wear and engine/exhaust cooling raw water plumbing leak. Move this wire around from the opening by taping it to another part or wedging it between components. Put in a new plug and go for a bit of a motor about using at least half throttle. Do you mean with spark plugs removed coolant is comming out of the cylinder(s)??. I’m kinda confused because the video on you tube is a motor identical to my own and is listed as a 1954. So if your tell tale stops while your out on the water, Don't give up all hope, hollowing out for a tow. It will help you understand, care for, and lower the repair and maintenance cost for your Suzuki Outboard Engine (motor) for a overall improved satisfaction with your ownership. A gassy damp output would be in line. there is water coming from not only the radiator but also the motor. The water leaks out of the cover that screws on to the head where the spark plug goes into the head. Check for possible water in oil, also remove radiator cap and start engine does water want to pump out of radiator, is there white smoke coming out of tail pipe, if yes to any of those blown head gasket, if not sure yet remove spark plugs crank engine over is there any coolant coming out of spark plug holes, if yes blown head gasket, and last have a block test any repair shop can do this. I wasnt able to track the final message, but this weekend, I realized that my outboard (mercury mariner 9. But if that much water is going through, it shouldn't be hot. Also, take a look at the gaskets on the oil plugs. And it runs fine, beautifully in fact, but. If you have compressed air, blow as much water out of the manifold and spark plug holes, as you can. Water Coming Out of a Spark Plug Hole Black Specks, Crud, and Slime in the Cylinder Idle Runs Too Slow or Rough Holes In the Head Gasket 1. Water Coming Out Of Lowest Spark Plug. out of the hole or around the hole? that head has a cover gasket. The water coming in from the exhaust cover gets compressed by your piston, which turns it to gas- this extra Oxygen in your gas/oil mix makes the explosion too hot which will melt your piston (s) crown. If your tell-tale was weak (impeller worn and weak), then you would have less water going through the by-pass to the exhaust. When the tell tale stops, " They stop and start checking for possible causes ". 4hp 4 stroke Yamaha Outboard (oil coming out of spark plug hole) Hi All, My 4hp 4 stroke Yamaha failed me yesterday (F4AMH) when I went to try and start it the pull cord only came out a little bit. Water not coming out of pee hole. So if your tell tale stops while your out on the water, Don’t give up all hope, hollowing out for a tow. Remove the coil packs and spark plug wires, and sop up all the water in the spark plug hole. I didn't want to use the ear muffs and start the motor every time i come back from fishing especially at night. A telltale hole emits a small, visible stream of water after it has passed through the powerhead, to help indicate that cooling water is flowing. Put water in water tube and it did not come out of the pilot hole, but rather the drive shaft hole. With your socket wrench, remove the plug. This manual is detailed with hundreds of photos, pictures and illustrations to help guide you through repair procedures. If your outboard has a vacuum port then have engine running in water and connect a vacuum gauge to it. Find out which spark plugs your car needs. If this happens again, before I dry out the plug . Use a socket to remove the single or multiple spark plugs on your engine. OR---the powerhead is hot, making the 'stat open. Good Evening, I have a 2005 Yamaha F225TXRD it started running ruff so I pulled the spark plugs to find water in the cylinder heads on the starboard side (bottom two cylinders). Search in titles only Search in Yamaha Outboard Forum only. Re: I got water coming out of my spark plug holes!!! You need to get to the store NOW and buy some fogging oil; spray it in AFTER cranking the motor over without the plug in and get as much water out of it as possible. Each spark plug has a spark plug wire connected to it. Answer (1 of 5): How do you fix water getting in a spark plug housing? This question is a bit vague on what the problem is. The mid-section of an outboard consists of a bracket that houses the power tilt and trim or trim unit, the driveshaft housing, oil pan on 4-strokes, the water tube, and the exhaust. The spark plugs are located in the front upper half of the motor (4 of them). September 20, 2021 at 8:44 pm. Brought it up to 1500rpm for about two minutes and kept checking. 402 water coming out spark plug hole. Insert the upper screw plug, hand tighten, then tighten securely with your flathead screwdriver. It MUST be fixed before you run her or you will need to rebuild her. Your one plug was dry because it's getting steamed cleaned by this water vapor and extra heat, the piston is probably all clean too. About Spark Plugs Outboard 2 On Stroke Oil. Hold the throttle wide open and crank the engine over several times until the pressure on the guage stops building. Try running a piece of heavy weed whipper line up the pee stream tube with the engine running. First thing you should do is make sure your fuel line from tank to motor is NOT backwards. Take the spark plug wire boot off the plug tip. Weather your trailer it or keep it on a lift. Outboard Mercury Video Water Pump Replacement. I've used ring free, SeaFoam and Startron enzyme fuel treatment religiously. I have a 1997 30hp 2 stroke precision blend motor model ELRV. 4 Causes of Water Coming Out of the Exhaust (Should You. When you have a wet spark plugs you can have a blown head gasket I found this out from a video on YouTube and it was the head gasket the radiator fluid is slightly seeping into the engine oil that's why the car is not overheating you can fix this problem with Blue Devil head gasket sealer just read the directions and that's the reason why you're getting white smoke from the exhaust and that's. Yamaha Outboard Forum; If this is your first visit, Water coming out of Spark Plug 04-16-2019, 08:17 PM. Step #3: Inspect the Water Output. If the spark is good, make sure the air gap in between is according to the needed specification. Yes, it still is damp, it will dry out itself given time, or else pull the spark plug boots off the plugs, shoot boots with WD40 inside, and also down into holes and over spark plugs, may take awhile to dry being they are way down in there. The engine then seems to be on its way to over heating and gets very hot, at which point I have stooped it running before I do any real damage to it. I've heard of this happening when the engine gets a little too warm usually caused by an impeller . On a two-stroke engine, run a rich gas-oil mix used during break-in, which will add more lubrication. 1991 Mariner 40 hp -Water leaking from top spark plug! ADD TO FAV ORTIES 4/18/10 @ 7:38 PM ORIGINAL POST JoeMomma USER SINCE 1/14/10 BLOCK USER I noticed that quite a bit of water is leaking out of the top spark plug while the motor is running. mercury outboard thunderbolt 402, My question is It has water coming out of a small hole that was ment to be there twords the back of the engine at the top by the spark source for … read more. Usually the leak is right next to the spark plug hole because this is the hottest part of the panel and thermal loads of movement are the greatest in this area. Engine cools down, wires come back together, engine fires. 2) Connect garden hose to flushing port. Would any damage be caused if I removed the thermostat and flushed. I have had the power head off and replaced this gasket. Re: water coming out of spark plug hole This should be an easy fix. When it seems like no amount of replacement plugs can fix the issue, it might be due to a number of factors. As for the stator windings, there only needs to be one very small break in the windings to give the problem - OB warms up , stator winding "break" opens up = no spark. When it is repair the gasket is brittle and blows out thus leaking around spark plugs (usually #1 or #2) To repair this you will need to remove the water jacket cover and replace gasket. Started the motor up on a fresh remote tank of gas noticed immediately that the motor would not run unless I had the throttle on high. Reaching the 4-Year Mark To ensure your Yamaha outboard performs its best and to extend its lifespan, preventative maintenance should always be a top priority. Why Outboard Motors Use Special Spark Plugs. Granted it might not be the same as 4500 with the backpressure of pushing a boat. Dry out the bilge and keep an eye on it. Also, check your boat’s spark plug and replace it if it’s defective. As for the water in the spark plugs, that is still confusing me because if the valve cover gasket is bad there would just be plain oil in there, no water. Other then the very heavy exhaust odor and constant water spitting out of the relief hole, the motor runs good. HELPP!!!!! I have water in my spark plug cylinders!!! What would be the easiest way to dry it out? I wanted to clean my engine bay. Now that the water supply is hooked up, you can safely start your outboard engine. 2: Water on a plug doesn't instantly mean a blown head gasket or cracked block. Soon, don't let the water etch the cylinder wall. So, if a seal starts to fail, oil can leak past these seals and into the spark plug well. When I started the engine water still flowed out of the lower unit but no water came out of the water discharge hole which is mounted on the rear of the engine itself about half way up. The bracket is what holds the entire outboard to the transom of the boat. Coolant/water around the spark plug hole. When the engine is cranked, there should be a blue spark at the tip of the plug. I even got it to stop leaking/dribbling gas. I have at 1997 with 787 motor when i hook up the water hose water gushes out of the spark plug holes any ideas thanks. The motor could well last another 10 or 20 years if you correct the problem - you are liable to kill it in less than a season if you don't. When I changed the thermostat it now comes out as it should. If you have water on the inside of your plugs that is coming from your exhaust cover, not through the spark plug threads. BBCBoards is the leading online community for Bass Boat connections. It is above the prob, about a 1" hole. Try changing out the valve cover gasket which also replaces the spark plug tube gasket, then wait a week or so and see if anything returns to the spark plug holes. Buy a spark plug tester and check for a spark. Hold the plug against the engine block to ground it. There is a separate oil container on the side of the motor and I assume there is a mechanism that mixes it with the gas. After all of the water is out, WD-40 the spark plug holes. I had one on an older OB fixed it w/ pc 7 worked for a good long time. I have a Yamaha 67D-28199-71, 4-stroke 4hp outboard engine. MODELS & YEARS COVERED: DT2 (DT-2) 1988, 1989. If it is backwards, the vacuum in the carb will suck gas up after a number of pulls and begin running. If your gasket comes off of the plug, remaining behind in the hole, it’s time to replace the entire plug. The only place water can get into a sparkplug housing is from inside the cylinder. Water comes out of spark plugs on my 50 hp mercury outboard any ideas - Answered by a verified Marine Mechanic We use cookies to give you the best possible experience on our website. Water is seeping from around the treads of the top plug and is not coming out of the weep hole. A lot of water is pouring from my exhaust on my 2002 Denali, but without white smoke. outboard can be flushed on the trailer or at dockside. DF175 No water exiting pee hole. Might as well replae the water pump while your there. I found the best solution for using the flush port finally since my lower unit has the low water pick up the ear muffs won't work without buying the $40 attachment. I turned off the engine and tried blowing through the. The plug was rusty and was not firing right. when it stops coming out spray via an oil gun some enigne oil into the exhaust port on the valve and inside the plug hole and crank again to lubricate the parts. When the tell tale stops, ” They stop and start checking for possible causes “. mercury outboard thunderbolt 402, My question is It has water coming out of a small hole that was ment to be there twords the back of the engine at the top by the spark source for the plugs. With your hand, twist the throttle position wide open. The telltale pushes water out with high amounts of pressure. Vic, I think this is aircooled, looks just like my '80 3. Re: water coming out of spark plug hole i'm gonna say that the water is leaking from the water jacket cover and being sucked in and pushed out with compression - spark plugs dont seal perfectly and steam could get drawn in there - it is common for these motors to leak around the top plug. If you paid somebody else to build it gear . The video shows a hole in the side of the lower unit that spits water out intermittantly. Check all your raw water inlet plumbing leaks and your fresh water tank leaks. Spark Plug Tube Seals On Cylinder Head. of course you could have a cracked cylinder but lets be positive. Pump until oil begins flowing out of the upper drain hole. Attach a compression gauge into the spark plug socket. NOTE: Always use a glove or a rag to hold the plug to avoid a painful electric shock. Re: Water coming out spark plug holes! If you have water on the inside of your plugs that is coming from your exhaust cover, not through the . Keep the upper plugs out during this time. Step #5: Refill the Lower Unit. What causes water in spark plug holes 2 and 4 only? Some people like to think that it magically appears out of thin air, Some might say that you have a leak in the Head gasket or maybe Valve.