Removal & Installation
- Before servicing the vehicle, refer to the Precautions section.
- Properly relieve the fuel system pressure.
Remove or disconnect the following:
Negative battery cable
- Turn the crankshaft pulley clockwise until No. 1 cylinder is on the compression stroke. The TDC mark on the pulley without the paint mark should align with the timing pointer.
- Verify the correct TDC position by ensuring that the lobes of the No. 1 cylinder camshafts are pointing outward. If not rotate the crankshaft 360° until the lobes are correct.
- Remove the oil pan rear plate cover and install a locking tool into the drive gear.
- Remove the crankshaft pulley.
- Remove the oil pan and strainer
- Loosen and remove the front cover bolts in the reverse of the tightening sequence.
- Remove the front cover and pry out the front cover oil seal.
- Remove the 3 O-rings from the cylinder heads and block.
- Remove the chain tensioner cover from the front cover.
- Remove the oil pump drive spacer and oil pump.
- Compress the left side chain tensioner and install a pin through the hole to secure it, then remove the tensioner.
- Remove the chain tensioner, tension guide and slack guide.
- Remove the left side timing chain.
- While holding the camshaft in place, remove the left side camshaft sprockets.
Repeat the procedure on the right side to remove the chain tensioner, guides, timing chain and camshaft sprockets.
Be sure the crankshaft key is pointing toward the center of the left bank. This should be a 45° angle from the center. Check that the camshaft dowel pins are in the correct location as shown.
Install or connect the following:
Camshaft sprockets by holding the camshaft with a wrench and tightening the sprocket bolts to 112 ft. lbs. (152 Nm).
Confirm that the timing marks on the crankshaft sprockets and chains are still aligned.
Oil pump and tighten the bolts to 78 inch lbs. (9 Nm).
- Install the crankshaft pulley so it aligns with the dowel pin of the oil pump drive spacer.
- Apply clean engine oil the crankshaft pulley bolt and tighten the bolt to 69 ft. lbs. (93 Nm), plus an additional 90°.
- Installation of the remaining components is the reverse of the removal procedure.
- Fill the engine with clean oil.
- Fill and bleed the cooling system.
- Start the engine and check for proper operation.