Removal & Installation
- Before servicing the vehicle, refer to the Precautions Section.
- Disconnect the negative battery cable.
- Drain the cooling system.
- Remove the upper intake manifold.
Remove the cylinder head covers, Crankshaft damper, and timing chain cover.
WARNINGWhen aligning timing marks, always rotate engine by turning the crankshaft. Failure to do so will result in valve and/or piston damage.
Align the crankshaft sprocket timing mark to the mark on the oil pump housing. The mark on the oil pump housing is 60° After Top Dead Center (ATDC) of number 1 cylinder.
WARNINGWhen the timing chain is removed and the cylinder heads are still installed, DO NOT rotate the camshafts or crankshaft without first locating the proper crankshaft position. Failure to do so will result in valve and/or piston damage.
- Remove the power steering pump and bracket as an assembly. Do not disconnect power steering lines from pump. Reposition pump and support with suitable retaining strap.
- Remove primary timing chain tensioner retainer cap and tensioner from right cylinder head.
- Disconnect and remove camshaft position sensor from left cylinder head.
Remove timing chain guide access plugs from cylinder heads.
NOTEWhen camshaft sprocket bolts are removed, the camshafts will rotate in a clockwise direction.
- Starting with the right camshaft sprocket, remove the sprocket attaching bolts. Remove camshaft damper (if equipped) and sprocket.
- Remove left side camshaft sprocket attaching bolts and remove sprocket.
- Remove lower chain guide and tensioner arm.
- Remove the primary timing chain.
- Inspect all sprockets and chain guides. Replace if worn.
- If removed, install the right and left side short chain guides. Tighten the attaching bolts to 21 ft. lbs. (28 Nm).
- Align the crankshaft sprocket timing mark to the mark on the oil pump housing.