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Technical Thermostat gasket

Discussion in 'The Hokey Ass Message Board' started by 61 chevy, Jun 27, 2014.

  1. 61 chevy
    Joined: Apr 11, 2007
    Posts: 891

    61 chevy
    Member

    Got a new aluminum thermostat housing with O ring. Do I need to add sealant to O ring or install it dry. Anybody know what the torque specs are? Being installed on a 283 chevy engine. Thanks for any help.
     
  2. Rusty O'Toole
    Joined: Sep 17, 2006
    Posts: 8,994

    Rusty O'Toole
    Member

    O ring should not need any sealant. You might want to put some Never Seize between the parts to stop them corroding together.
     
  3. squirrel
    Joined: Sep 23, 2004
    Posts: 44,302

    squirrel
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  4. porknbeaner
    Joined: Sep 12, 2003
    Posts: 41,384

    porknbeaner
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    I think it torques to 15 foot pounds. I have never torqued one, I just tighten it up. Something to keep in mind, make sure that the bolts are not too long. I see that all the time, for some reason a standard out of the bin bolt has a tendency to be about an eighth too long.
     
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  5. wingman9
    Joined: Dec 30, 2009
    Posts: 804

    wingman9
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    from left coast

    Thanks, squirrel. I've been looking for these, so I bought four. You never know...
     
  6. For an o-ring I would use something like swimming pool pump lube. Any pool store will have it and its slilcone based. For that matter a little blue RTV would work, but use it sparingly.
     
  7. Gman0046
    Joined: Jul 24, 2005
    Posts: 5,764

    Gman0046
    Member

    Those thermostat housings with "O" rings are usually made in China and are worthless. They usually corrode through or leak in no time. Buy a cast aluminum housing with a flat gasket once and you'll never have to replace it again.
     
    Muttley likes this.
  8. Good or bad, I always put studs in the intake and them put the housing on, never had a cheepo or a good 1 leak.
     
  9. 61 chevy
    Joined: Apr 11, 2007
    Posts: 891

    61 chevy
    Member

    had a chrome one, it leaks all the time, I thought a O ring would seal
     
  10. squirrel
    Joined: Sep 23, 2004
    Posts: 44,302

    squirrel
    Member

    the problem with the chrome ones, is they're made of zinc (pot metal). The one I pictured is made of aluminum. There are some newer ones with the O ring that are made of aluminum, but they're a bit too modern for my tastes.
     
  11. 61 chevy
    Joined: Apr 11, 2007
    Posts: 891

    61 chevy
    Member

    I called jeff Gordon chevy, for a original one , their books didn't go back far enough
     
  12. squirrel
    Joined: Sep 23, 2004
    Posts: 44,302

    squirrel
    Member

    Most auto parts stores sell replacements. They used to be made of cast iron, but these days they're made of aluminum.
     
  13. Muttley
    Joined: Nov 30, 2003
    Posts: 18,340

    Muttley
    Member

    Yep, avoid Chinese junk and avoid headaches..............funny how that works huh?
     
  14. squirrel
    Joined: Sep 23, 2004
    Posts: 44,302

    squirrel
    Member

    Although the new replacement ones are made in china, too. But they're more likely to work
     
  15. 61 chevy
    Joined: Apr 11, 2007
    Posts: 891

    61 chevy
    Member

    yea ,I wish I had called Oreilly
     
  16. squirrel
    Joined: Sep 23, 2004
    Posts: 44,302

    squirrel
    Member

    I've noticed in the past few years that car dealerships are totally useless for parts for our old stuff
     
  17. Gman0046
    Joined: Jul 24, 2005
    Posts: 5,764

    Gman0046
    Member

    Not too far from me is Bob Hook Chevrolet that has a performance section. A while back I needed a SBC thermostat housing an called them and asked if they had any that were not made in China. All they had were the cheap Chinese chrome steel housings which are garbage. Early SBC F.I. housings were made of cast aluminum with flat gaskets and no "O' rings. They fit after market intakes as well as stock intakes. I buy them on eBay usually in the $20-$30 range. Get one it will last forever.
     
  18. tfeverfred
    Joined: Nov 11, 2006
    Posts: 15,796

    tfeverfred
    Member

    I have the Mr. Gasket housing with the o-ring and it has not leaked. Going on a few years of driving. BUT, the one before it sprung a leak. So, it's a crap shoot. The best bet is to get an original cast one. It may set you back a bit, but it will probably last forever.

    I miss the old style cast ones that took a gasket. I'll probably get one, when my cheap Chinese one springs a leak. If it ever does.
     
  19. I don't like the way the o ring fits so I am going to take it off and use a flat gasket in its place.
     
  20. You and me both Don,,mine leaked like a sieve. HRP
     
  21. tfeverfred
    Joined: Nov 11, 2006
    Posts: 15,796

    tfeverfred
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    Wasn't it a cheap ass o-ring that caused that space shuttle disaster? Just a thought.
     
  22. 61 chevy
    Joined: Apr 11, 2007
    Posts: 891

    61 chevy
    Member

    well I guess I am doomed
     
  23. Don's Hot Rods
    Joined: Oct 7, 2005
    Posts: 8,319

    Don's Hot Rods
    Member
    from florida

    We had one chrome neck that leaked no matter what we did to it. We tried all kinds of permatex sealants with one and even two gaskets, and we filed the manifold and the neck flat so there was no distortion between them.......still leaked.

    Finally, we used Permatex "The Right Stuff" and planned to put a new gasket on with it, but we forgot the gasket. It still sealed perfectly and is still holding 4 years later. Now I just use The Right Stuff for almost every gasket I make. I just installed a finned aluminum valley cover on the Olds engine for my rpu and I used The Right Stuff again and it did a really good job.

    Try it, you'll love it. It comes in an aerosol can like Cheez Wiz so you just lay down a nice bead and that is it.

    Don

    [​IMG]
     
    Last edited: Jun 28, 2014
  24. squirrel
    Joined: Sep 23, 2004
    Posts: 44,302

    squirrel
    Member

    a $15 can of sealer to "fix" a part than be replaced by one that works for $10. Gotta love it
     
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  25. Don's Hot Rods
    Joined: Oct 7, 2005
    Posts: 8,319

    Don's Hot Rods
    Member
    from florida


    That's assuming you don't use the same can for other jobs, like end gaskets on intakes, water pumps, etc. I pay $5 and change for it (I get the employee price) and a can goes a long way. But even if it took the whole can, if it works it is worth it. :D:D

    Don
     
  26. squirrel
    Joined: Sep 23, 2004
    Posts: 44,302

    squirrel
    Member

    I bought a can of that stuff once, it worked ok for what I used it on, but it went bad by the time I found another use for it.
     
  27. Fenders
    Joined: Sep 8, 2007
    Posts: 3,922

    Fenders
    Member

    How timely, Last week I replaced my chrome one that got a leak (rotted through). The new one from Autozone came with an O ring, I used a few small dabs of gasket maker to hold the O ring in the groove, put it on, and no leaks.

    Like Beaner said, just tighten it up. And the old bolts did look like they would bottom and the new ones looked cheap (though a better, shorter length) so I bought a couple shorter ones to use.

    I will now keep my eyes open for an old original iron one as a spare.
     
  28. tfeverfred
    Joined: Nov 11, 2006
    Posts: 15,796

    tfeverfred
    Member

    That's the only draw back. I started using, after seeing a thread here on it. Mine was still good about 2 weeks after I first used it, but by week 3, game over.

    My engine guy swears by those damn intake end gaskets. Until the one on my new motor leaked. I told him to use "The Right Stuff" or I'd keep coming back pissed. He swears by it now.

    Oh, I stopped by O'Reilly's this morning and got that housing you suggested and a couple bolts. I'll toss it under my seat, just in case. Cheap insurance.
     

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