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2G 4g63t oil leak

Posted by 14Kingt, Oct 19, 2019

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  1. 14Kingt

    14Kingt Probationary Member

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    Lima, Ohio
    I notice after we ran my 95 gsx for a while oil had pooled up on the valve cover where the spark plugs are. I put a new gasket on and it’s still leaking from somewhere. Could the cover have a crack in it?
     
  2. tk106

    tk106 Supporting Member

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    Cincinnati, Ohio
    Could be a crack. They’re super fragile so do not over tighten. OEM gaskets are the best. I’ve read felpro are good as well but I do not have first hand experience with them. Try a generous amount of rtv on the bolt closest to your leak.
     

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  3. 19Eclipse90

    19Eclipse90 DSM Wiseman

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    OKC, Oklahoma
    It could be a crack in the cover. It could also be the oil cap gasket or seal.
     
  4. Vegas smith

    Vegas smith Proven Member

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    Houston, Texas
    My guess is a leaky oil cap gasket.
     

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    1993 Eagle Talon TSi AWD
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  5. miguelmcv

    miguelmcv Proven Member

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    Joined May 3, 2009
    Fresno, California
    Oil cup gasket.
     

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    1997 Eagle Talon TSi AWD
    awd · automatic · 2G DSM

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    1995 Mitsubishi Eclipse GST
    manual · 2G DSM
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  6. BOOMBOOMGSX

    BOOMBOOMGSX Probationary Member

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    LAS VEGAS, Nevada
    nah I don't think its anything that major bro. im having same issue just purchased my GSX and it has been sitting for almost a decade. found spark plug cylinder four tube filled with oil after a hard pull on the 215. replace your engine oil cap, the seal is dry rotted and not sealing. Thats where I found oil coming from and it makes sense, also replace you dipstick with a new one. found it leaking from there too. rockauto.com has them both for under $20
     

    Street Build 155  1

    1990 Mitsubishi Eclipse GSX
    awd · manual · 1G DSM
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  7. 14Kingt

    14Kingt Probationary Member

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    Joined Sep 5, 2019
    Lima, Ohio
    I replaced the oil cap and gasket it was brand new. I’m taking off the cover to see if gasket is cracked but I highly doubt it.
     
  8. Dhan

    Dhan Supporting Member

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    Denver, Colorado
    Could have a crack in, like already mentioned. There are four round rubber seals that go around the spark plugs too. Are those still in good shape?
     

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    1992 Eagle Talon TSi AWD
    awd · manual · 1G DSM
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  9. 14Kingt

    14Kingt Probationary Member

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    Lima, Ohio
    I changed those like a month ago but didn’t start it up until a week ago.
     
  10. iugrad92turbo

    iugrad92turbo Proven Member

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    Kalamazoo, Michigan
    Could be anything do a dye test.
     

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    1992 Eagle Talon TSi
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    We're on Boost likes this.
  11. 14Kingt

    14Kingt Probationary Member

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    I was going to repaint it anyway. I will look for leaks when it’s cleaned.
     
  12. delta448

    delta448 DSM Wiseman

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    Clarksburg, West Virginia
    You might want to check the PCV valve also. If it's clogged up it can cause oil to seep out around the valve cover gaskets.
     

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  13. chrysler kid

    chrysler kid Proven Member

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    Oil cap
     

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    14.1 @ 97 · 2G DSM
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  14. We're on Boost

    We're on Boost Proven Member

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    Seattle area, Washington
    If the cover itself is cracked it might not be that easy to see. We never saw ours which leaked slowly for years. Thought it was probably a bad gasket. Thought we'd send the cover out for a nice powder coat while it was off for gasket change. Bad idea. The shop that did that never saw the crack either. It leaked same as ever.
    Then at English Racing, several years later, same thing, they didn't see it, put the same cover back onto fresh engine. Leaked on the first dyno pull :( !! So they found a good used cover and that fixed it.
    If you would like to try some kind of test, google "dye penetrant test for cracked aluminum".
     
    Last edited: Oct 25, 2019

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  15. PsychoTSI

    PsychoTSI Probationary Member

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    Joined Jul 21, 2019
    Harrow, ON, Canada
    My 92 TSI sprays oil out the block when I hit 17 PSI or whatever the valve cover is not leaking it's spring for the back of the engine up on to the hood and on to the valve cover check to see if you have any micro fractures around your oil pump because I'm going to have to change a block this year LOL
     

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