condition of Head and piston while doing head swap. Opinions wanted. PICS inside

Discussion in '94-95 5.0 - Specific' started by Dugzy33, Dec 8, 2014.

  1. Dugzy33

    Dugzy33 Member

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    Doing a little at a time with my gt40 head/intake swap.
    Need some ideas on what is going on here...

    1995 gts
    original 5.0 never opened up 165K miles
    When I bought it noticed upon hard acceleration (2500rpm and above) a light blueish/brownish/whitish smoke
    from tailpipe.

    I wasn't too worried as It runs good.
    changed o2 sensors no change
    did tune up
    #7 cylinder plug approaching foul
    changed plugs wires etc
    still blows smoke
    still runs good, idles good, etc
    seems to use a little more oil than my last 5.0

    So I don't worry about it hoping it is a valve seal issue that will be solved when I put on my newly rebuilt gt40 heads.

    So I pop the driver-side head today and this is what I find...

    Still see some cross hatching in the cyls
    # 7 piston is clean (?)
    other pistons are not (expected this)
    other exhaust valves are white (expected this)
    #7 is not (?)
    Kinda thought I would see carbon build up on # 7 more than the others
    Here are the pics...

    [​IMG]

    [​IMG]


    So what is the deal here?
     
  2. JKady

    JKady Active Member

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    Looks like #7 was running way rich, may have a leaking injector, what's the intake port on that cylinder look like? Way cleaner than the rest?

    It's also possible that the head gasket was starting to go but I would expect the combustion chamber to get cleaned along with the piston from coolant in the cylinder.
     
  3. RichV

    RichV Well-Known Member

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    Your pics are not showing.

    What fould the #7 plug? Carbon or oil?