Engine/Transmission (1994 - 1998) exhaust manifold redo

[SRehberg]

I had a ATS manifold installed, and noticed the bolts were installed without anti-seize compound. I know the gaskets are metal, but was wondering if one bolt at a time could be backed out, treated, and reinstalled without disturbing the gaskets significantly? Anyone tried this with good results? I'm afraid over the years the bolts may seize theirselves into the head.

 

[illflem]

You could anti-seize them one at a time but some folks have had trouble with the ATS bolts loosening repeatedly on their own, might be better to leave them be.

I've had no such problem with anti-seized ones though.

 

[SRehberg]

Maybe I'll just leave them alone for now then. If they loosen up, is it an exhaust leak that notifies you to the looseness? If I have to go after them later, then I'll apply the anti-seize. Thanks for the information.

 

[krs]

I don't think that there's any reason to assume that anti-sieze products will encourage any bolt to loosen. If anything, they'd do the opposite by filling all the spaces between cut threads. I know, they all say "lubricant" but bolts SHOULD be lubricated so that full specified torque can be applied when tightening them. A well torqued bolt is unlikely to loosen unless the parts it fastens change dimensionally. When that happens there is no help available. The main thing that anti-sieze compounds do is inhibit galling and corrosion.



End of rant #2.

 

[MLee]

lose manifold bolts

I note that this is directed to ATS problem but-------what is recommended to hold the manifold bolts in the 24 valve engine when they start to come lose? (stock manifold) My friend's is is working lose now, He wants to stay away from locktite because of the consequences. what about a locking tabs of some sort?

Marv.

 

[krs]

Mlee,



He could use Locktite without very dire consequences. Many people have the idea that Locktite, especially red Locktite, makes fasteners impossible to remove. That is not at all the case. All they do is harden into a claylike consistency that fills all voids between threads and makes threaded parts a little harder to break torque in removing. They are not glue or any sort of artificial weld.



Using loctite with anti-sieze will confuse bolts.

 

[illflem]

Originally posted by KRS





Using loctite with anti-sieze will confuse bolts.

Good one



Most folks run into touble using red Lock-Tite on small bolts, they break off rather than break loose. The manifold bolts are by no means small. No problem.



Here's a thread with what one member went though to keep his ATS bolts from backing out.

https://www.turbodieselregister.com/forums/showthread.php?s=&threadid=80732

 

[Joseph Donnelly]

My preference is anti-seize and check them once in a while. I'd take them out one by one like you said and put never seize on them, even though they don't seem to seize up unless you live in a humid area.

 

[SRehberg]

I was just looking at those bolts today, and it bothers me to see them without the anti-seize on them. I think I'm going to pull them one at a time and coat them. If they work loose then I'll deal with that once it happens. Should I pull the turbo mount bolts as well? Thanks for all the help

 

[hdm48]

If you're worried about them coming loose, use the anti-sieze and put a high heat flat washer with a lock washer on each. I have had very good luck doing this on race motors that like to blow exhaust gaskits.

As far as the use of Lock-tite. I use HEAT to loosen bolts with lock-tite. Humm, does the exhaust manifold get hot?





Dave