Engine Timing - Verification

Correct timing is critical for the NON free-wheeling designed, 2.7L engine. Engine timing can be verified by using the following procedures:

1. Remove cylinder head covers. (Refer to ENGINE/CYLINDER HEAD/CYLINDER HEAD COVER(S)  - REMOVAL)
2. Rotate engine until number one cylinder is at TDC on the EXHAUST stroke.
3. View the intake camshaft sprocket timing mark. The mark should be 90° from the cylinder head cover sealing surface. See Fig 1on both right and left cylinder banks.
4. Count chain pins from the mark on the intake camshaft towards the exhaust camshaft. Engine is timed correctly when there are 12 chain pins between the timing marks on the intake camshaft and exhaust camshaft. See Fig 1.
5. If marks are not correctly aligned, proceed to Timing Chain and Sprockets for service procedures. (Refer to ENGINE/VALVE TIMING/TIMING BELT/CHAIN AND SPROCKETS - REMOVAL) 

Fig 1: Engine Timing

Courtesy of DAIMLERCHRYSLER CORP.