Cylinder Head - Cleaning

CLEANING

CAUTION:
When cleaning cylinder head and cylinder block surfaces, DO NOT use a metal scraper because the surfaces could be cut or ground. Use ONLY a wooden or plastic scraper.

To ensure engine gasket sealing, proper surface preparation must be performed, especially with the use of aluminum engine components and multi-layer steel cylinder head gaskets.

NOTE:
Multi-Layer Steel (MLS) head gaskets require a scratch free sealing surface.

1. Remove all gasket material from cylinder head and block Engine Gasket Surface Preparation. Be careful not to gouge or scratch the aluminum head sealing surface.

2. Clean all engine oil passages.

CAUTION:
Non-compressible debris such as oil, coolant or RTV sealants that are not removed from bolt holes can cause the aluminum casting to crack when tightening the bolts.

3. Clean out the cylinder head bolt holes in the engine block.

DO NOT USE any adhesives when installing the MLS head gaskets. The use of adhesives may cause the gasket not to seal properly and may leak. MLS gaskets are to be installed on a surface free of debris and oils.