I am fixing up my 1991 K1500 with the 5.7L engine and have just a general question. When do you use gasket sealer with a gasket and when not to? I also notice that nearly all of the gaskets I have removed from the engine were not installed with any sealant on them at all so my idea is to just reinstall the new gaskets the same way. In fact, so far I haven't run into a single gasket that was installed with sealer and that sure makes removal of the old gasket quite easy: water pump thermostat oil pan oil filter adapter So, what opinions do others have about when to use a gasket sealer and when not to? Thanks!