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 CYLINDER HEAD COVER(S) )
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 (Fig 1) on 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 (Fig 1).
   Fig 1: Identifying Engine Timing

   Courtesy of DAIMLERCHRYSLER CORP.
5. If marks are not correctly aligned, proceed to Timing Chain and Sprockets for service procedures. (Refer to TIMING BELT/CHAIN AND SPROCKETS )