Thread: Phenolic IC ISSUES..please help. Sucking in oil cap.

Originally Posted by PWNED

This is a picture I took before I set the SC on the IC just to see where the rtv spread out too.

As seen i rtvd the pcv ports on the IC this time. You can slightly see the rtv I put on the SC as well of you look past the sharpie.

Let see how this works.

I did leave the IC stuck to the LIM. I did put a screw driver down both pcv holes on the IC to the LIM pcv holes to ensure no plugging.

thats way too much rtv

Originally Posted by bandook

I'm confused. One of your issues is that you keep blocking stuff with rtv, yet you continue to put huge beads on. Are you putting it on BOTH LIM and blower? Unless something is seriously warped, your LIM and blower will be only a couple thousandths apart when you tighten them down. That's all your filling. If 99% is being squeezed out to your intake passage and PVC then you could use about 98% less.

If I'm missing something, and this is just what everyone is doing for an intercooler, then forgive my ignorance, I've just always thought less is more when using this stuff.

correct, rtv is used excessivly in alot of situations due to the old school "lay a 1/4" bead" that was for oil pans and end seals on the intake...machined RA was rougher back then as well as gasket surfaces with large distances with little clamp load and larger passages/openings due to the older sand casting methods.

with rtv your only needing a bead about twice as tall as your fingerprint ridges. bias the rtv AWAY from the vital openings. rtv hates compressing, it doesnt spread out or flow well...this can create a lumpy sealing area and other headaches like gaskets sliding out/splitting as well as the ribbons that squeeze out tend to block passages or restrict them.

a 1/16th x 1/16th inch round bead is plenty excessive...next time shave the nozzle more carefully for a diagonal tip with a 1/16th inch hole that will let you flatten the bead a little. with no paper gaskets you should be able to scrape some of that rtv off the sealing surfaces and look at just how thick it is across those sea's of rtv...that might give you a better idea of how thick you actually need to apply it.

tighten slowly and carefully inching down on final tq to allow the rtv to flowout.

ive run across a coule cores that were assembled with excessive rtv and the passages blocked internally on either the fresh air side or the pcv side