GM Service Manual Online
For 1990-2009 cars only

Two types of sealer are commonly used in the engines. These are the RTV sealer and the anaerobic gasket eliminator sealer. Apply these sealers properly and in the proper place in order to prevent oil leaks. Do not interchange the two types of sealers. Use the sealer recommended in the procedure.

    • RTV (room temperature vulcanizing) is used where a non-rigid part is assembled to a rigid part. Common examples are oil pans and rocker arm covers.
    • Anaerobic gasket eliminator hardens in the absence of air. This sealer is used where two rigid parts (such as castings) are assembled together. When two rigid parts are disassembled and no sealer or gasket is readily noticeable, the parts were probably assembled using gasket eliminator.