QuestionKevin thanks again for replying. another question please,
I had asked you about why you have to remove cylinder head covers and loosen rocker arms. Why would you need to loosen up the cams. When you get everything to TDC and remove timing belt covers and tensioner, wouldn't there be enough slack to take belt off.
AnswerI am just going by what the instructions say I have not replaced on on a PAC yet.
REMOVAL - TIMING BELT
TIMING VERIFICATION
Remove the outer timing covers. Rotate the crankshaft until the pointer on the crankshaft sprocket aligns the TDC mark on the oil pump. Check to determine if the camshaft sprocket timing marks are aligned with the marks on the inner timing cover. It may take an additional full revolution of the crankshaft before the camshaft sprocket marks are aligned (TIMING GEAR MARKS).
CAUTION: The 3.5L is NOT a freewheeling engine. Therefore, loosen the valve train rocker assemblies before servicing the timing drive.
Perform fuel pressure release procedure. (Refer to 14 - FUEL SYSTEM/FUEL DELIVERY - STANDARD PROCEDURE).
Disconnect negative battery cable.
Remove both cylinder head covers and loosen the rocker arm assemblies.
Remove the front timing belt cover (Refer to 9 - ENGINE/VALVE TIMING/TIMING BELT / CHAIN COVER(S) - REMOVAL).
Mark belt running direction, if timing belt is to be reused.
CAUTION: When aligning timing marks, always rotate engine by turning the crankshaft. Failure to do so will result in valve and/or piston damage.
Rotate engine clockwise until crankshaft mark aligns with the TDC mark on oil pump housing and the camshaft sprocket timing marks are aligned with the marks on the rear cover (TIMING GEAR MARKS)
Remove the timing belt tensioner (TIMING GEAR MARKS) and remove timing belt.
Inspect the tensioner for fluid leakage.
Inspect the pivot and bolt for free movement, bearing grease leakage, and smooth rotation. If not rotating freely, replace the arm and pulley assembly.
When tensioner is removed from the engine it is necessary to compress the plunger into the tensioner body.
CAUTION: Index the tensioner in the vise the same way it is installed on the engine. This ensures proper pin orientation when tensioner is installed on the engine.
Place the tensioner into a vise and SLOWLY compress the plunger (Compressing Timing Belt Tensioner). Total bleed down of tensioner should take about 5 minutes.
When plunger is compressed into the tensioner body install a pin through the body and plunger to retain plunger in place until tensioner is installed
REMOVAL
Perform fuel pressure release procedure. (Refer to 14 - FUEL SYSTEM/FUEL DELIVERY - STANDARD PROCEDURE).
Disconnect negative battery cable.
Raise vehicle on hoist.
Remove accessory drive belt (Refer to 7 - COOLING/ACCESSORY DRIVE/DRIVE BELTS - REMOVAL).
Remove accessory drive belt tensioner.
Remove bolts for power steering pump. Reposition power steering pump aside.
Remove crankshaft damper (Refer to 9 - ENGINE/ENGINE BLOCK/VIBRATION DAMPER - REMOVAL).
Remove the lower front timing belt cover fasteners (LOWER TIMING BELT FRONT COVER).
Lower the vehicle.
Support the engine with a floor jack.
Remove the air cleaner housing (Refer to 9 - ENGINE/AIR INTAKE SYSTEM/AIR CLEANER HOUSING - REMOVAL).
Remove the front engine mount (Refer to 9 - ENGINE/ENGINE MOUNTING/FRONT MOUNT - REMOVAL).
Disconnect the fuel supply line at the fuel rail (UPPER TIMING BELT FRONT COVER).
Remove the upper timing belt cover bolts and remove front timing belt cover (Refer to 9 - ENGINE/AIR INTAKE SYSTEM/AIR CLEANER HOUSING - REMOVAL).
