Lesson 3.4: Applying too much gasket maker or flange sealant.

Mistake #4: Applying too much gasket maker or flange sealant.

Probably the most common error is using too much gasket maker. When it comes to gasketing, more is not necessarily better. Knowing the right amount to apply takes some experience, the flange size will determine the bead size. A thin flange requires a smaller bead size than a wide flange, but a bead thickness of around 1/8” is a good place to start. The bead of gasket maker or flange sealant that you apply will spread out to a very thin layer when you tighten up your assembly, so you don’t need to apply a lot of product to get the ideal seal. Applying too much product can cause excess sealant to squeeze out and migrate into areas where it might cause trouble – such as clogging the screen of the oil pickup. Try to apply the gasket maker or flange sealant in one continuous and even bead to one surface. After completing the original bead, ensure all bolt holes are circled.