Is there a common, standard guideline on when to use/not use a sealant on a gasket?
For an example: when involving gas - no sealant; involving oil - use sealant.
1. I've removed the covers on my 1965 110 to change out the fan bearing and am now ready to apply a gasket to the motor, followed by the top ventilator cover, another gasket and finely the top block cover with the new fan bearing. Should I apply sealant to the gaskets (if so, to both sides of each?) or not?
2. Soon I'll be dropping the oil pan.... sealant on the gasket or not?
3. How about on the new carb gaskets?
Thanks for the help.
Currently working full time repairing Corvairs and restoring old cars.
Located in Snellville, Georgia
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bbodie52 wrote:I wanted to make sure that some important insulators were not accidentally omitted when your car was worked on in the past…
Carburetor rebuild kits often contain a thin gasket to seal the underside of the carburetor where it mounts on the intake manifold. The Corvair carburetors need a plastic insulator to isolate the base of the carburetor from the intake manifold, which prevents the gasoline inside the carburetor from boiling or vaporizing if excessive heat is allowed to transfer from the hot aluminum intake manifold on the cylinder head to the carburetor body. These plastic insulators can be easily damaged when removed. Clark's Corvair Parts bundles gaskets and insulators together. They are listed near the top of page 56 in the catalog http://www.corvair.com/user-cgi/catalog ... ow_page=56.
If the insulators are not present, and only a single gasket is being used under each carburetor, the fuel may be close to boiling when the car is driven. The use of fuel may allow some effective cooling of the fluid in each float bowl as fuel is consumed and replaced with cooler liquid from the tank. But when the engine is shut down the remaining heat from the heads may continue to heat the gasoline in the float bowls of the idle engine, causing the gasoline to percolate and appear as it drips from the venturi cluster in each carburetor.
Lake Chatuge, North Carolina
1966 Corvair Corsa Convertible