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Installing new manifold studs

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rob 8N11071 KS

05-24-2001 07:46:53




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Is there a trick to this? I was going to use the double-nut method to cinch the studs down pretty tight, then simply tighten the nut. I've read about "stud puckey", which according to the permatex online catalog is "Ultra Copper RTV sealant". Is that a good idea?

This is a remanufactured block and new studs (and brass nuts), if that makes a difference.




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Drifter

05-24-2001 10:05:33




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 Re: installing new manifold studs in reply to rob 8N11071 KS , 05-24-2001 07:46:53  
The double nut method will work great. I suggest you make sure the RTV is recommended for manifold studs. Generally, RTV decomposes when exposed to gasoline. Blue or possibly red thread sealant (Loctite) would be my choice.



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rob 8N11071 KS

05-24-2001 11:16:44




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 Re: Re: installing new manifold studs in reply to Drifter, 05-24-2001 10:05:33  
third party image

Here's what I bought over lunch.

"Suggested Applications:
Exhaust manifolds/headers, valve covers, oil pans, timing covers, water pumps, thermostat housings "

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Drifter

05-24-2001 12:42:38




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 Re: Re: Re: installing new manifold studs in reply to rob 8N11071 KS , 05-24-2001 11:16:44  
Rob, I use that stuff all the time as a gasket sealer in high temperature areas but it's not a thread sealant which is what you're looking for. Also it wrinkles-up around gasoline like when used on intake manifolds. Get the Loctite.



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Salmoneye

05-24-2001 14:24:47




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 Re: Re: Re: Re: installing new manifold studs in reply to Drifter, 05-24-2001 12:42:38  
He said he wanted to seal manifold studs that go into a water jacket.
Sure as heck better not be any gasoline present in this application.
Use the High Temp RTV and consider yourself to have covered all the bases and then some.

Correct me if I am wrong but, Loc-Tite is not a thread 'sealant' it is a thread 'locker' to keep nuts and bolts from backing off. There are different grades to lock different size nuts and bolts. Some that are removable on a 5/8" bolt will permanently lock a 1/4". You will twist the stud off if you have to remove it someday if you have the wrong grade stuff...

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rob 8N11071 KS

05-24-2001 13:18:40




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 Re: Re: Re: Re: installing new manifold studs in reply to Drifter, 05-24-2001 12:42:38  
Isn't extreme heat one of the things that people use to undo even the strongest loctite?

The loctite.com catalog appears to offline right now, otherwise I'd check.



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Drifter

05-24-2001 14:14:24




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 Re: Re: Re: Re: Re: installing new manifold studs in reply to rob 8N11071 KS , 05-24-2001 13:18:40  
Rob, The Loctite website should provide more info. Use the blue for general purpose fasteners. It sets-up in the threads and looks like nylon or plastic when you take it apart. Use red for stuff that you don't think will ever need to come apart. It will come apart with heat from a torch. When it sets-up it looks like hard epoxy. I used both for years back when I raced dirt bikes and never had a fastener failure. Just wish it would work on my broken hip (non-motorcycles injury). Good luck

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Ed Gooding (VA)

05-24-2001 08:25:05




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 Re: installing new manifold studs in reply to rob 8N11071 KS , 05-24-2001 07:46:53  
>> I was going to use the double-nut method to cinch the studs down pretty tight, then simply tighten the nut. I've read about "stud puckey", which according to the permatex online catalog is "Ultra Copper RTV sealant". Is that a good idea? <<

That's how I did mine (double nut and stud sealer), and it has worked fine.

fwiw..... ..Ed
'52 8N475798



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