Quote:
Originally Posted by Pete Munroe
The RTV comes out of the tube pliant...liquid to gel...seems unless the assembler waited for the RTV to pertify, it will squeeze out before the gasket.
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Pete, I am not an expert or I wouldn't be asking for help on this forrum, so don't take me wrong.
I have worked in the plastic industry for 30 yrs. Molton plastic at the right temp is very similar in viscosity to RTV. We assemble some piping that is 5" ID with a piece of aluminum for a gasket. The seal surface is a 3/4" irous. There are 10 studs that are 1.25" diameter. These studs are torqued to 3000 ft-lb. If we allow a tiny drop of polymer to get on the gasket, it will have a slow leak forever. No matter what you do, you can never squeeze it out.
Where the RTV was on the gasket on both sides, I was measuring 0.010" + thicker than where the RTV was not. I had cleaned the RTV off the other gasket and it measured about 0.005" thinner where the RTV was than the rest of the gasket. So the gasket compressed more where the RTV was. I have no doubt the RTV was holding the intake up at the four corners, and most of the clamping force was going to the RTV areas.
The milled out area where the bolt goes between the ports, was level full with
oil. I don't think this area had much clamping force at all.