Toyota
Dodge Durango
 Service Manual
Engine » Cleaning and inspection
Cylinder heads

CLEANING

CYLINDER HEAD GASKET SURFACE PREPARATION

To ensure engine gasket sealing, proper surface preparation must be performed, especially with the use of aluminum engine components.

Never use the following to clean gasket surfaces:

  • never use a metal scraper
  • never use an abrasive pad or paper to clean the cylinder block.
  • never use a high speed power tool or wire brush on any gasket sealing surface (Fig. 136).

Only use the following for cleaning gasket surfaces:

  • use Mopart Brake and Parts Cleaner
  • use only a plastic or wood scraper (Fig. 136)

Fig. 136 Proper Tool Usage For Surface Preparation Fig. 136 Proper Tool Usage For Surface Preparation

1 - PLASTIC/WOOD SCRAPER

INSPECTION

(1) Inspect the cylinder head for out-of-flatness, using a straightedge and a feeler gauge. If tolerances exceed 0.0508 mm (0.002 in.) replace the cylinder head.

(2) Inspect the valve seats for damage. Service the valve seats as necessary.

(3) Inspect the valve guides for wear, cracks or looseness. If either condition exist, replace the cylinder head.

    More about «Cleaning and inspection»:

    Intake manifold

    Exhaust manifold

    Cylinder heads

    Piston and connecting rod

    Oil pan

    Oil pump

    Cylinder block

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