Engine Gasket Surface Preparation

Fig 1: Proper Tool Usage for Surface Preparation

Courtesy of DAIMLERCHRYSLER CORP.

1 - ABRASIVE PAD

2 - 3M ROLOC™ BRISTLE DISC

3 - PLASTIC/WOOD 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.

Never use the following to clean gasket surfaces:

Metal scraper
Abrasive pad or paper to clean cylinder block and head
High speed power tool with an abrasive pad or a wire brush (1). See Fig 1

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

Only use the following for cleaning gasket surfaces:

Solvent or a commercially available gasket remover
Plastic or wood scraper (3). See Fig 1
Drill motor with 3M Roloc™ Bristle Disc (white or yellow) (2). See Fig 1

CAUTION: Excessive pressure or high RPM (beyond the recommended speed), can damage the sealing surfaces. The mild (white, 120 grit) bristle disc is recommended. If necessary, the medium (yellow, 80 grit) bristle disc may be used on cast iron surfaces with care.