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Posted by: stugray Jul 28 2016, 08:02 PM

I am putting my intake manifolds back on tonight after finding leaks using the "spray starting fluid on the manifolds" trick.

I have always used a thin coat of RTV Blue Silicone on the paper gaskets between the carbs & intake manifolds.
Now I read that RTV is bad news on the intake and should not be used.

So I did many searches (yes even on this site) and cannot find a definitive answer.
Most say use the thick paper gaskets all by them selves, dry.
Some say use some grease.

I found a few on this site that said use a "thin coat of non-hardening sealant", but they didnt say exactly which brand.
I have a couple of Curils, some permatex gasket maker (non-hardening), etc.

Any ideas?
I need something where you dont have to wait 24 hours as I dont have that kind of time. (loading for race tomorrow)

Thanks for the help in advance.
I'll go do the second manifold before putting the first carb back on.

Posted by: cuddyk Jul 28 2016, 08:05 PM

Assuming the paper gaskets are new, I say use them dry.

Posted by: green914 Jul 28 2016, 08:31 PM

I just replaced the carbs on mine recently, and used just the clean dry paper gaskets great.

Posted by: Mark Henry Jul 28 2016, 10:50 PM

Wheel bearing grease, just rub it into the gasket, remove any excess.

Seals up nice and the bonus is it won't stick to the head, manifold or phenolic spacer and the gasket can often be reused.
Been doing it this way over 25 years.

Posted by: colingreene Jul 28 2016, 11:17 PM

^ interesting.
ive always put them on dry though.
re used mine a few times.
most of the time they have glued themselves to the bottom of my carb so i leave them there.