Detroit Diesel — Camshaft Timing Verification

Testing & diagnosis

From a Detroit Diesel service manual — check it applies to your exact model before use.

Procedure

1. Remove the rocker cover.
2. Bar the engine to TDC with Engine Barring Tool (J-46392) on cylinder No. 1 with No. 6 valve in overlap.
3. Locate the mark on the camshaft and mark the top of the corresponding gear tooth.
4. Remove the CKP from the flywheel housing.
5. Install the flywheel TDC Locating Pin (W470589001500) through the CKP hole and engage the flywheel notch.
6. Install the rear Camshaft Timing Tool onto the camshaft housing.
7. Install the timing tool into the grooves cut into the cams and pin it with a bolt.
8. Verify that marks on gear teeth match marks on the timing tool.

Source: Detroit Diesel service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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