Uhhh!, Timing cover leak.

Discussion in 'Street/strip 400/430/455' started by LARRY70GS, Aug 30, 2020.

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What do you use on the Timing Cover Gasket

  1. RTV

    21 vote(s)
    48.8%
  2. Spray Tack or copper coat

    13 vote(s)
    30.2%
  3. Gasgacinch

    5 vote(s)
    11.6%
  4. Other

    8 vote(s)
    18.6%
Multiple votes are allowed.
  1. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    As of now, I am going to hold off pulling this apart until I have the gaskets in hand. Should be here Thursday. I think what I will do as I have nothing to lose at this point is to clean the leak area up as well as I can, then push some right stuff into the void. Let that cure and then cover it with some JB Weld. I have nothing to lose except a little delay. If it holds, this job can wait until winter. I am glad I started this thread as I didn't even consider that the gasket thickness would come into play. I ordered the SCE gaskets from Summit, they were cheap enough. The radiator has been drained a full day now, so it isn't seeping anything.
     
    Mike Sobotka likes this.
  2. BQUICK

    BQUICK Gold Level Contributor

    Worth a shot Larry.....RightStuff ain't cheap but has saved me from taking some things apart. Holds up and bonds better than sillycone.
    May not be pretty or the "right" way but saves time and trouble.
     
  3. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    Better pictures,
    TimingCoverLeak.jpg TimingCoverLeak2.jpg
     
  4. BQUICK

    BQUICK Gold Level Contributor

    Never seen that...ya gotta wonder what the system pressure was to do that. I'd run a 7lb cap after repair. You run cool anyway.....
     
  5. 65Larkin

    65Larkin Well-Known Member

    For the gasket to have pushed out like that I would be highly suspect of the radiator cap. Production tolerances being what thay are today I would even pressure test a replacement before installing it.
    After reading JW's post personally i would wait until I had replacement gasket to do it properly rather than crutch it in the meantime in case it is gone internally as well
     
  6. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    I was going to pull it apart, but now I am concerned with the gasket thickness and my roller cam. I ordered both the Felpro and the SCE gaskets, so I'll be prepared.
     
  7. hugger

    hugger Well-Known Member

    no more than the difference will be you'll be fine
     
  8. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    So you don't think the gasket thickness will make an appreciable difference?
     
  9. Mart

    Mart Gold level member

    Rip a piece of that pushed out gasket off and mic it.
     
  10. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    I could do that, it's pretty fluid logged though. I have it on my work bench. I'll measure it tomorrow.
     
  11. 436'd Skylark

    436'd Skylark Sweet Fancy Moses!!!!!

    JW assembled it? I'd ask him which gaskets he used. He likely uses the same kit all the time. Or maybe the gasket kit is listed on your invoice from him.
     
  12. TORQUED455

    TORQUED455 Well-Known Member

    See post 37
     
  13. TORQUED455

    TORQUED455 Well-Known Member

    Larry, quit monkey-farting around and get that thing apart! Aren’t you retired? You can all the cleaning and painting done before the gaskets get there. Don’t forget the Vaseline for the oil pump. If I were doing that job, it would get a very thin layer of gray Right Stuff on BOTH sides of the timing cover gasket and water pump gasket, 592 on any bolt threads that go into water jackets, and anti-seize on any threads that don’t see water. I would also skip the cork gasket for the front of the pan and use The Right Stuff there too. There is a time to be a “club” and there is a time to be a “surgeon”. In applying of the sealer and the cleanliness of the parts, it’s “surgeon” time. Use chlorinated brake clean (and gloves for your protection) for final cleaning, make sure you stuff a rag in the oil pan opening to stop the as much as you can from getting in the pan, and DO NOT use any type of abrasive discs on anything for cleaning.

    While I don’t recommend risking any type of lick-dob repair, Aluma-Seal powder seems to work pretty good, but usually that type of “repair” is saved for vehicles heading to the auction.
     
  14. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    He was 90% sure he used the TA gaskets which were original GM. Curiosity got the better of me, and i followed Marts suggestion. Looks like the SCE gaskets are the right choice. They are .032".

    TCGasketThickness.jpg
     
  15. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member




    Thanks Bob,
    I already started taking it apart. I'll take my time and do it right. With the amount of gasket that popped out, I don't think it will hold anyway. I couldn't get it dry to even try pushing some sealer in there. Looks like the SCE gaskets are thicker like the GM ones. I'll use those. I'm not pulling the oil pump apart unless I have to. I have a primer tool, and a drill.[/QUOTE]
     
  16. hugger

    hugger Well-Known Member

    I always like the Victor thicker gasket myself as well ,..now all Cometic now I believe they all by each other out every other year
     
  17. TORQUED455

    TORQUED455 Well-Known Member

    Once the cover comes off, you will more that likely loose prime, and the only easy way to get that back is to pack the pump unless you have a pressured-vessel. Sometimes putting 10 or more quarts of oil in the pan gets the job done too, but it’s a good time to inspect the thrust plate, gears and cavity anyway. Then use the priming tool. The tool doesn’t get you your prime back, it only saves you from cranking or running w/o oil pressure. It’s going to be hard putting the cover back on with oil running out of it everywhere. It would really suck if you put the cover back on and couldn’t get the prime back and then pulled the pump apart to pack it only to find some trauma in the cavity. But you can do it however you see fit. Just trying to give some helpful suggestions.
     
  18. 69GS400s

    69GS400s ...my own amusement ride!

    Did you test/calibrate your micrometer with a feeler gauge ?
     
  19. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    Yes.
     
  20. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    Thanks Bob,
    I just didn't want to pull apart the pump if I didn't have to. If the gaskets rip, then I 'll need to replace them with the right thickness to keep my end clearance. JW put it together. Maybe I'll order the TA shim kit in case I have to. I'm just remembering the debate about packing the pump with vaseline, which I have done before. See JW's comments in post #6 in this thread,

    http://v8buick.com/index.php?threads/455-oil-pump-priming.267834/#post-2202120
     

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