Exhaust/coolant leak

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Roadart

FABO Gold Member
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Do all exhaust manifold bolts need thread sealant on them? I did rear only and have coolant leaking. Service manual indicates all bolts need sealant. What is the best sealant,? I used Permatex ultra copper(on rear bolt only).
 
I use teflon thread sealant. It works but may not be high temp enough. It's a good idea to put some sealer on all the exhaust bolts/studs. I think only the 4 outside ones go into water though.
 
toolmanmike said:
I use teflon thread sealant. It works but may not be high temp enough. It's a good idea to put some sealer on all the exhaust bolts/studs. I think only the 4 outside ones go into water though.
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Ok guess I will redo all bolts . Thanks for quick response.
 
Exhaust bolts on what? A 1935 Packard 1207?
 
toolmanmike said:
He wishes! LOL Correct me if I'm wrong. 4 corner studs on the small blocks and all the big block bolts need sealer.
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Yeah I guess? If that's what we're givin advice about? How we be supposed to be knowin? lol
 
Front and rear bolts on each side go into the water jackets. A total of four. These four are to be studs, not bolts.
The sealer needs to be hi-temp. I used red silicone for 50 years. Now they sell hi-temp Permatex thread sealer.
Do it correct cause it gets messy redoing them things.
 
sorry guys,i always forget the important stuff. It is a 72 318 in a dart w/headers. It is in the draining process now. Thanks to all Joe
 
Roadart said:
sorry guys,i always forget the important stuff. It is a 72 318 in a dart w/headers. It is in the draining process now. Thanks to all Joe
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Only the front and rear bolt on each side has water behind them. The rest are blind and don't need anything.
 
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