Question about Mitsubishi Passenger

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Rocker cover oil leaks NL pajero 1998 NL

I have had the rocker cover gaskets replaced 3 times in the last 2 years. The most recent when I had the motor rebuilt professionally by a reputable mechanical shop. In the past it has leaked both sides but this time after 4 months its back to its normal tricks on my garage floor. Definitely coming from the passenger side rocker cover. Is this an inherant Mitsubishi problem or is there a simple solution. Gaskets used have not been orig in the past.

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  • ruralworx Jun 22, 2008

    Same problem, just been replaced, lets see how long they last. NL 1998 Pajero.

  • cookie48 May 12, 2009

    I have a 97 motero sport with 112k miles and its leaking on pass side in back It leaks onto the exhaust manifold smells terrible and it leaks on the ground .I have decided to try and fix this myself. I am in the process of replacing spark plugs . what a job! You must tak off the plenium and throttle body to access rocker covers, so while I have it apart I will change the gasket for pass side

  • Anonymous Mar 17, 2014

    I have had the steering looked at 4 times and each time they put oil on two rubbers and tell me that,s what is wrong but it only lasts a couple of days. Surley there is more to it.
    An acquaintance of mine suggested the problem may be the racket and pinon. He knows of a friend who's Pajero had the same problem.

  • Anonymous Mar 21, 2014

    Replacing rocker cover gaskets te magna v6

  • Anonymous Mar 28, 2014

    I have reset timing on Mitsubishi 6g72 engine at number 1 tdc left bank cam moves 1 tooth each way on timing mark is this normal

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Had same problem it turned out to be seal at back of head at rear of camshaft replaced those seals 2years ago no more leaks

Posted on Dec 07, 2009

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The gaskets may not be at fault; the first time the valve cover was removed it was probably damaged by an impatient mechanic.
Most covers are sheet metal and the gaskets have an ugly tendency to get sticky over time making removal very difficult.
An inexperienced or sloppy mechanic can easy damage the edge of the cover causing a permanent distortion that a gasket replacement cannot correct.

I hope you have correctly identified the source of the leak since a warped cylinder head can also cause oil loss but that would be from the junction of the cylinder and block.
That would be much more expensive to correct than replacing a damaged valve cover.

Posted on Jun 21, 2008

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Use a film of gasket sealant on both sides of the new gasket when you replace it. When installing the cover, make sure there isn't any wiring or anything that could get caught under it.

Posted on Jun 21, 2008

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2 Answers

2007 ford explorer sport trac 4.0 v6 all 3 spark plugs on passenger side are coated in oil doesn't smoke 2nd set of plugs in 3 months driver side plugs are fine im tired of guessing anyone know?


comment exactly what you mean when you say --covered in oil
1-- is they covered in oil on the outside around the insulator and wires/ coils
2-- are the center electrodes black with oil and misfiring
if it the outside then replace the rocker cover gasket or if the plugs are recessed into the rocker cover , replace the oil seal under the plug tube in the rocker cover

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Leaks oil from rocker cover. repaired 3 times. is this a common fault? what is the solution?


The rocker cover will leak oil..............

1. If the rocker cover has been damaged due to poor mechanical fitment and is no longer perfectly straight; or
2. The rocker cover bolts are not torqued evenly at the correct ft/lbs specification; or
3. If the rocker cover bolts have been excessively torqued in which event the cover will distort and the gasket will be excessively compressed; or
4. The gasket is in poor condition and needs to be renewed; or

5. The gasket fitting is sloppy done in which event you can assume the cover will not have been properly fitted either.

I would be buying a new rocker cover (or a straight used one) before doing the next repair because your original is probably deformed now and will likely never seal properly.

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1 Answer

Is there a certain type of gasket or something else when there is a oil leak starting in a 1998 pontiac firefly


clean around the oil pan gasket area well as some oil leaks are actually rocker cover gasket and filter leaks that run down the block and appear as pan leaks.. Check front crankshaft seal as the oil from there also appears as a pan leak

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2 Answers

Is there supposed to be oil in with the spark plugs


No this is not mormal. I am assuming you are saying there is oil on the outside of the spark plug and not on the electrode when you removed it. If you have oil on the outside of the plug your valve cover gasket is leaking. Try tightening the valve cover down ever so slightly. DO NOT over-tighten. If that does not work then the gasket will need to be replaced. Unless it is leaking lots of oil, you may just want to live with it as it is expensive to pay someone to replace the valve cover gaskets.

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It is most probably the rocker cover gasket. This is enough to install, you just need to source the correct part from your local parts store or dealer. Remove bolts and rocker cover and replace seal. Ensure on replacement, that you use a sealant that is compatible with oxygen sensors, I use PERMATEX ULTRA-BLU RTV Silicone. That seams to work a treat.

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3 Answers

1992 toyota corolla oil leak around spark plug tubes. how is it repaired


You need a new valve cover gasket set. This will come with seals that fit around the spark plug tubes.

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1 Answer

SPARK PLUGS FULL OF OIL


Do you notice a puddle under the car? Or smoking when you shut it off? The rocker cover gaskets are the culprit. If you have the spark plugs in a well inside the rocker cover, the will fill up with oil and also leak out the back. You can replace the gaskets, a fairly easy job, you have to pull everything off the top of the engine to get the covers off. And they give you the new seals for the spark plug well with the gasket kit. They only go about 10 years, I replaced mine and they are starting to leak again. Hope this helps.

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1 Answer

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pull the valve cover gaskets, clean them and replace them, there is no cheater way to do this. To pin point leak you'l need to look closely at the covers if oil is running down the sides towards front or back of motor (theres 2 covers, one front, one rear) if it is, you may be able to tighten bolts, but be careful not to strip them. If they are tight, youl need to change the cover gaskets

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2 Answers

2001 jaguar s-type 4.0 oil in spark plug area


Hi bravo956
i also have the same problem regarding the oil leak. this is due to the spark plug gasket leaking and you will need to replace them. they are circular gaskets about 1.5 inches across that fit to the underside of the rocker covers and prevent oil from seeping down the long spark plug hole. when i investigated my leak i assumed it was just the rocker cover gasket that was leaking but once everything was removed it is obvious.

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