1970 GS 350 Valve Cover Gasket Replacement

Discussion in 'Small Block Tech' started by 65rivGS, Jun 25, 2018.

  1. 65rivGS

    65rivGS New Member

    Any tips on replacing the passenger side valve cover gasket on a 1970 GS 350 with A/C would be appreciated. At first glance, it looks like the top A/C bracket and alternator need to be removed, but just making sure.
  2. Smartin

    Smartin antiqueautomotiveservice.com Staff Member

    Just the top AC bracket needs to come off. Alternator can stay.
  3. 65rivGS

    65rivGS New Member

    Thank you.
  4. Mark Demko

    Mark Demko Well-Known Member

    Disconnect the battery just to be safe, the valve cover MAY wack the positive post on the alt.
    BYoung likes this.
  5. 70skylark350

    70skylark350 Well-Known Member

    I used those cork gaskets with the rubber in them, High tacked them to the valve covers. no leaks!
  6. JStov

    JStov Well-Known Member

    Has anyone luck removing the screw on the passenger side valve cover, more so the last one on the under side close to the firewall, its a pain to get to and the last one any!! Pics enclosed any help or thoughts will be greatly appreciated!! Thanks

    Attached Files:

  7. hugger

    hugger Well-Known Member

    Deep well and a wiggle iirc
    JStov likes this.
  8. alec296

    alec296 i need another buick

    1/4 drive ratchet, swivel, long extension and a deep socket should do.
    68Rivi_In_Cali and JStov like this.
  9. JStov

    JStov Well-Known Member

    Thank you both ive tried both regular and deep well with the swivel just camt seem to get it, its at angle that wont give. I cam only imagine the torture trying to reinstall lol but again thansk I'll try again tomorrow
  10. hugger

    hugger Well-Known Member

    You can also use a flexible extension
    JStov likes this.
  11. Dan Gerber

    Dan Gerber Platinum Level Contributor

    Thinking back about 25 years, I believe I had to disconnect the passenger-side engine mount and rotate that side of the engine up a little to get a good grip on the bolt and remove it without damaging the A/C housing the first time I R&R’d the valve cover.
    JStov likes this.
  12. MrSony

    MrSony Well-Known Member

    In my regal i can reach it with a 3/8 wrench box end.
  13. Fox's Den

    Fox's Den 22 years of racing the same 355 Buick motor

    stick the long socket on there with the swivel then use a long extension on a angle as far as you can go to break the bolt loose then stick the ratchet on there to finish.
  14. Mart

    Mart '71 350 GS, almost stock

    All you need....

  15. JStov

    JStov Well-Known Member

  16. JStov

    JStov Well-Known Member

    That's what I was thinking im headed bavk out tomorrow night give that a try thanks
  17. Darron72Skylark

    Darron72Skylark Well-Known Member

    Reconditioned valve covers a few months back. I used the deep socket, flex joint, extension and ratchet solution to access those fasteners. It went back together more easily than it came apart as I recall.
  18. JStov

    JStov Well-Known Member

    Finally got it off thanks for the guidance fella's!

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