Replacing manifolds/risers/elbow is sealant needed??

[jellyfish]

I'm about to replace manifolds/3" spacers/elbows with OEM stuff and I read the OEM Merc manual #24 that calls for Loctite 510 on the gasket between manifold to spacer to elbow, but I have also read many post on different forums to install dry but only with OEM gaskets..

Should this sealant Loctite 510 or another sealant such as perfect seal be used... Or go dry with no sealant ..

My engine is a 2001 5.0L EFI raw water cooled..

Alex

 

[maxxman04]

Re: Replacing manifolds/risers/elbow is sealant needed??

as you've seen, it depends on who you talk to. most will probably tell you to install all exhaust gaskets dry, no sealant

 

[Zackman]

Re: Replacing manifolds/risers/elbow is sealant needed??

No sealer, use only the Merc gaskets, be certain that all surfaces are in spec. Here is the service bulletin that addresses these issues.​

http://www.boatfix.com/merc/Bullet/99/99_10.pdf​

Also, be absolutely sure your using the right gasket for your application. The details are in the service bulletin.​

 

[Bt Doctur]

Re: Replacing manifolds/risers/elbow is sealant needed??

And thats why one of my local Merc Certified dealer uses Permatex Aviation sealant on the manifold/riser gaskets after he checks for "flatness" with a file.
Ask 110 people, get 100 answers.I`ve used it on almost everything since the`70s. Never an issue, never a failure.

 

[jellyfish]

Re: Replacing manifolds/risers/elbow is sealant needed??

No sealer, use only the Merc gaskets, be certain that all surfaces are in spec. Here is the service bulletin that addresses these issues.​

http://www.boatfix.com/merc/Bullet/99/99_10.pdf​

Also, be absolutely sure your using the right gasket for your application. The details are in the service bulletin.​

ZACKMAN...

Many thanks for the info... This answers all my questions!!!!

Alex