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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  • Mitsubishi Master
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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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  • Master
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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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