GM Service Manual Online
For 1990-2009 cars only

Use of Room Temperature Vulcanizing (RTV) and Anaerobic Sealant Gasket Eliminator

  1. Apply RTV to one of the clean surfaces. Use a bead size as specified in the procedure. Run the bead to the inside of any bolt holes. Do not allow the sealer in any blind threaded holes, as it may prevent the bolt from seating properly or cause damage when the bolt is tightened.
  2. Assemble components while RTV is still wet (within 3 minutes). Do not wait for RTV to skin over.
  3. Tighten bolts to specifications. Do not overtighten.
  4. Apply a continuous bead of gasket eliminator to one flange. Surfaces to be resealed must be clean and dry.
  5. Important: Anaerobic sealed joints that are partially torqued and allowed to cure more than five minutes may result in incorrect shimming of the joint.

  6. Spread the bead evenly with your finger to get a uniform coating on the complete flange.

Use of Room Temperature Vulcanizing (RTV) and Anaerobic Sealant RTV Sealant

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.