RTV was developed by GE. I don't know if Permatex or Motorcraft actually makes it but the point is, regardless of color, you need RTV that is oil (and gasoline) resistant. Regular Silicone Sealant II bloats when exposed to oil, and causes a mess. I know from using it on a fuel tank sending unit. Secondly, only use what is necessary because the excess goes somewhere. You don't want pieces of RTV in your oil (which can plug small oil holes) or in your coolant (which can plug small coolant holes). All silicone is heat AND cold resistant, so it won't go away.
Mike Gaffney is THE MAN when it comes to high performance FE engines. He is experienced and offers sound advice. Intake manifold gaskets are notorious for leaks in FE's and a gasket either seals (forever) or it leaks (almost immediately). The metal core inside is designed to maintain gasket rigdity and to prevent it from creeping. Here's an example of what you DON'T want:
This gasket leaked coolant immediately. Even though the edges were trimmed beautifully, the flimsy Print-O-Seal partition moved a lot.
Your new gasket won't do this if installed correctly.
EDIT: Also notice someone used far too much BLUE RTV around the water hole. It's all balled-up and in pieces. All you need is a very THIN layer. - Dave
Mike Gaffney is THE MAN when it comes to high performance FE engines. He is experienced and offers sound advice. Intake manifold gaskets are notorious for leaks in FE's and a gasket either seals (forever) or it leaks (almost immediately). The metal core inside is designed to maintain gasket rigdity and to prevent it from creeping. Here's an example of what you DON'T want:
This gasket leaked coolant immediately. Even though the edges were trimmed beautifully, the flimsy Print-O-Seal partition moved a lot.
Your new gasket won't do this if installed correctly.
EDIT: Also notice someone used far too much BLUE RTV around the water hole. It's all balled-up and in pieces. All you need is a very THIN layer. - Dave
Comment