riser/elbow gasket sealant? w/pics

davescarrs · Post by **davescarrs** » Sat Apr 16, 2011 10:58 pm

Replacing riser and elbows on 1987 Trojan Int 10M FWC 454 (350) Crusaders after noticing an antifreeze drip from gasket on the way to winter storage. It never dripped before. The risers and elbows removed were original and actually looked terrific on the inside (coulda just tightened the nuts down a little I guess).

My question is whether or not to use a small amount of sealant (like Permatex #2 or Permatex Right Stuff or something comparable) on the gaskets. The issue has been debated greatly on other sites, but a search here yielded no mention.

I have found the advice here and knowledge to be very beneficial so I'm asking if any of you use sealant on gaskets when installing the riser and elbows?????

The gaskets are Interface Solutions N-8094 and made of some type of Syntheseal composite material.

alexander38 · Post by **alexander38** » Sun Apr 17, 2011 6:31 am

if the mating surface's are good and clean I'd only use just a little sealer on them for insurance

koviak · Post by **koviak** » Sun Apr 17, 2011 7:53 am

I have always used a thin layer of Permatex copper plus with out issues.

prowlersfish · Post by **prowlersfish** » Sun Apr 17, 2011 9:10 am

maybe spray on cooper coat or spray tac. or nothing . RTV is used when there is no gaskit .not with a gaskit in most cases . If the surface was in poor condtion some times rtv would help , But if in new condtion I would not .

farfrompuken · Post by **farfrompuken** » Sun Apr 17, 2011 9:14 am

Just replaced my risers on my 2 Crusader 350's and Osco (that's what I replaced them with) recomends no sealant

davescarrs · Post by **davescarrs** » Sun Apr 17, 2011 11:52 am

Thanks!!!

obeejr · Post by **obeejr** » Tue Apr 19, 2011 9:51 pm

Crusader recommends PerfectSeal for theirs

gardnersf · Post by **gardnersf** » Tue Apr 19, 2011 11:56 pm

I used a thin layer of permatex black.

Stripermann2 · Post by **Stripermann2** » Wed Apr 20, 2011 8:08 am

I use Permatex Ultra Black. Just a very light even smear around the gaskets.
Never had a leak.

I had a discussion with an engineer at Osco on this subject a few years back. He said although they label no sealant, and they machine tolerances as close as possible, it's just added insurance...

davescarrs · Post by **davescarrs** » Wed May 25, 2011 11:58 pm

I ended up using "Permatex Hylomar Universal Blue Racing Gasket Dressing and Flange Sealant" that I found at my local O'Reilly's Auto Parts. The description sounded good so i bought it and used it on the installation. I kinda just painted it on with my fingers. Seemed to have worked.

Thanks all for your input