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1987 GT-FOUR 177000km - just got it, got 2 codes and fun times

Discussion in 'Your 4th Gen beauty' started by trel162, Dec 8, 2013.

  1. trel162

    trel162 Well-Known Member Donated!

    Engine pics




  2. trel162

    trel162 Well-Known Member Donated!

    Oil pump and sump off

    Water pump installed and Just got 2nd gen thermostat to suit the 2nd gen pump and outlet.

    Waiting on oilpickup gasket and oil pump-engine gasket so I can put it back together.

    Jobs to do
    Front diff pinion seal and axle seals and oils
    Rear diff mount and oil
    shocks, brake discs and pads
    New radiator-in the market-heard good and bad about cheap ebay jobs but might be worth a try.
    Rear main is possibly leaking too. so perhaps a clutch job in my near future.


    Engine is sweet as - i hope

    Old pump and pickup gasket


    What's this in the sump? Broken garter spring and the remains of a small rubber seal, is it a valve stem seal? Oil pump relief valve?
  3. shaun4vert

    shaun4vert Well-Known Member Donated!

    Looks like a valve steam seal.
  4. trel162

    trel162 Well-Known Member Donated!

    Cheers Shaun that seems to be the leading suspect.
    Better get the head off. Damn
  5. Stig

    Stig ST162 Guru Donated!

    At least one valve stem seal has shattered.
    Doesn't bode well for the seals in the motor and I'd be looking to replace ALL the seals.
    You need to open the oil pump relief valve and clean it out or it could stick open and wreck your bearings.

    Open the oil pump and show us the internals, there is an o-ring inside which also needs replacing as well as a seal.

    If the oil pump shows signs of scratches inside, it's a goner


    Also take off the rod caps and inspect your bearings, if they look bad you can swap them now, but if you're going to do the head then I suggest swapping the rings as well.
    Under #3 main cap is the crank thrust bearing, I'd check that too as well as the main bearings.
    Last edited: Apr 3, 2014
  6. trel162

    trel162 Well-Known Member Donated!

    Yep valve stem seal it is confirmed.
    So engine out I guess. It's gonna get worse before it gets better.
    I have a new oil pump-need gasket to engine block and gasket for pickup.
    I'll inspect the old one for a spare.
    i want to put it back together and see if it runs without knock error, then take the engine out.

    so engine out needs
    - gasket kit
    - head job
    - piston rings
    - bearings
    - clutch kit
    - axle seals
    - fix/replace exhaust manifold

    cost has just escalated out of control
  7. Stig

    Stig ST162 Guru Donated!

    Yeah, finding one with a brand new motor isn't gonna happen - now you understand why I had to let my GT4 go.

    The thing that's freakin me out is that there's NO WAY THOSE PIECES COULD HAVE GOT THERE, the seals are inside the shim buckets and cannot escape. Which makes me wonder if someone dropped it and it fell down into the sump.
    I don't of anyone swapping seals with the head on?
    Last edited: Apr 6, 2014
  8. spyder

    spyder Well-Known Member

  9. trel162

    trel162 Well-Known Member Donated!

    The plan

    Maybe someone did drop a seal down a spark plug hole or oil filler...
    I have seen in-car valve spring removal tools on YouTube.
    All the spark plugs were black and looked the same.
    When i started the car it would spit out black oil every time.

    I've decided it's not worth the risk so I am going to remove the head and get it worked at a shop.

    So far i've removed
    - intercooler reservoir - want to heat shield it
    - throttle body - needs cleaning and CSI cleaned
    - exhaust manifold, headers and downpipe
    - water bypass pipes from head
    - rocker cover - need hex bolts, screws are screwed
    Just need my hex set and I can take off the head.

    I've read about using 3sge cams as an upgrade. I have a spare pair I could use. Is there any point for a stock setup?
    If i get the head done I want it to be ready for a later turbo/power upgrade.

    My immediate plan to get the car running
    -timing end pumps/pulleys/seals/belt
    -head worked/valve job
    -stock internals, replaced where necessary-bearings,rings
    -Rebuilt/resealed ct26 or upgrade, straight down pipe and repair or upgrade headers
    -Keep stock ECU for now

    -Clutch and rear main seal, axle seals, diff pinion seals

    Later - bigger turbo/side feed intake/front mount intercooler
    -mods to support like ECU

    Stock power is fine with me for now as long as it's strong and the rest of the car is in good shape
    Last edited: Apr 9, 2014

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