various gasket sealers for elbow gaskets
Good advice m.m.m. That's what I've used before is the Permatex. Just this week I've ben talking to Loctite just to try and get the best sealer I can as I'm fixin to change mine on my 3 year old 5.7liter that are leaking on the outside.
The Permatex is good to 400 degrees. I'm sure the exhaust gases are way up there but the actual metal surfaces are much lower, who knows exactly-maybe over 400 right on the edge of the exh side but way less on the water side.
I bought some Loctite Hi Temp Gasket Maker part # 30558, (good to 600F.) Put a bead out just to look at it-looks thicker like the old #2Permatex form-a-gasket but different smell and dried much quicker than Permatex so it's not just a similar product. Looks like it would work even better. It's non-hardening also. I'm going to try it next week or so.
Volvo Penta has just gone to thin metal gaskets with a crimped ridge in them. Cannot get the old paper type for my 5.7L from Volvo. I think I'll try one of the metal type with the Loctite 30558(even though they strictly say to put the metal one on completely dry) and one paper type aftermarket gasket. I'm just not sure about the metal type!
Do you have any experience using a gasket maker hitemp silicone on the elbows?? Loctite suggested it may work also(Loctite # 5920). Just have to make sure its a sensor safe one. But they aren't any higher temp than the 30558 - 600 degrees. Never heard of anyone using silicone. Probably not any better than the Perma or Loctite.
thanks for any advice
