Changing Oil Pan Gasket & have a question

Discussion in 'Camaro Questions' started by Glava, Jan 8, 2018.

  1. Glava

    Glava Veteran Member Lifetime Gold Member

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    Central NY
    I have the service manual for my 79 Z/28 4 speed and it has the steps for changing the oil pan gasket to the newer one piece style. But, I figure there may be forum recommendations for the easiest/ best way to change.
    According to the service manual, it looks like I have to disconnect the battery, take off fan shroud, remove air cleaner, take off the distributor cap, remove the exhaust crossover, tranny inspection cover, oil filter and starter. Then remove the motor mount bolts and lift the engine up a little to get the pan out.
    Is this pretty much what has to be done?
     
    Last edited: Jan 8, 2018
  2. tom3

    tom3 Veteran Member

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    Pretty much it. And there's a certain position you want the crankshaft in to get most clearance from counterweights and rods. Don't know what that position is though.
     
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  3. Green hornet

    Green hornet Veteran Member

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    Tom3 is correct on the crank position. Do s search here and you should find it. It escapes me.
     
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  4. RS1979

    RS1979 Veteran Member Lifetime Gold Member

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    Do yourself a favor and pull the distributor out. You can break it if you leave it in there. Don’t ask me how I know. Lol
     
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  5. 70 SS/L78

    70 SS/L78 Veteran Member Lifetime Gold Member

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    If you pull the distributor, mark it's exact position before hand. That way you don't have to re-adjust the timing.
     
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  6. Twisted_Metal

    Twisted_Metal Administrator Staff Member Lifetime Gold Member

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    Get the crank in the right position (5 o’clock on timing mark) then pull the distributor.
     
  7. slayer021175666

    slayer021175666 Veteran Member

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    I'm not following you, Terry. Are you just saying to put the timing mark almost pointed at the ground? 6 o'clock would be exactly pointed at the ground if I'm following you. Also, why pull the dizzy? Is it a firewall clearance issue when you raise the motor for cross member clearance? I'm thinking about putting in a one piece oil pan gasket since my old one is leaking a bit. Never worked with a one piece but, I hear there are different thicknesses to beware of. Give me your thoughts oh, knowledged one! :)
     
  8. Twisted_Metal

    Twisted_Metal Administrator Staff Member Lifetime Gold Member

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    The best gasket.... I don't know. I helped my son with one several years ago but the engine was out of the car and he bought the gasket.

    I haven't check the crank counterweight position with the timing mark myself.... 5 o’clock is folk lore I found on the internet.
    It's very helpful to have the crank in the correct position so you can move the pan in the proper direction to remove it.

    Yes... Firewall clearance.
    You need to take the distributor cap off, at least.

    If you do decide to pull the distributor completely, put the crank in the proper position first.
    (Marking the distributor position then finding you have to rotate the crank to remove the pan will negate knowledge of where the distributor was located when you started the process.)

    Good Luck!
     
  9. slayer021175666

    slayer021175666 Veteran Member

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    Thanks, Twisted. Good to speak with you again!
     
  10. 70 SS/L78

    70 SS/L78 Veteran Member Lifetime Gold Member

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    Another note on removing the distributor. If you have a timing light you can always reset the timing afterwords. If not, you want to mark the exact location of the distributor housing AND make note of what spark plug the rotor is pointed at. It's possible to have the rotor pointed 180 degrees in the wrong direction or be off 1 tooth on the gear when re-installing it.

    As others have mentioned, if you rotate the engine afterwards then it throws your marks out the window. Unless you you put position of crankshaft/harmonic balancer timing mark on Top Dead center when you remove the distributor, then you have a reference mark to go back to when re-installing the distributor.
     
    Last edited: Jan 12, 2018

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