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CLEANING Dodge Durango III

3.6L Engine - Service Information 1 illustration ~203 words

CLEANING

CAUTIONWhen 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. Refer to «Engine - STANDARD PROCEDURE»(ref-465933-S25948921452012042300000) . 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.

Scheme 225

Scheme 225: INSPECTION
Scheme 225: INSPECTION
  1. Check cylinder head warpage with a straight edge (2) and feeler gauge (1).
  2. Cylinder head must be flat within specification. Refer to «Engine - Specifications»(ref-465933-S10971928572012042300000) .
  3. Verify that the valve tappets move freely in theirs bores and that they have been rotating.
  4. Inspect camshaft bearing journals for scoring.
  5. Remove carbon and varnish deposits from inside of valve guides with a reliable guide cleaner.
  6. Inspect the following components and verify that they are within specification : Refer to «Engine - Specifications»(ref-465933-S10971928572012042300000) . Camshafts Valve Tappets Springs Valve Seats Valve Guides Valves