Timing Belt & Sprockets - Removal

TIMING BELT

TIMING VERIFICATION










Remove the outer timing covers. Rotate the crankshaft until the pointer on the crankshaft sprocket (10) aligns with the TDC mark on the oil pump (9). Check to determine if the camshaft sprocket timing marks are aligned with the marks on the inner timing cover (1) and (8). It may take an additional full revolution of the crankshaft before the camshaft sprocket marks (1) and (8) are aligned.

CAUTION: The 4.0L is NOT a freewheeling engine. Therefore, loosen the valve train rocker assemblies before servicing the timing drive.

1. Perform fuel pressure release procedure. Service and Repair.
2. Disconnect negative battery cable.
3. Remove both cylinder head covers and loosen the rocker arm assemblies.
4. Remove the front timing belt cover Engine Timing Cover(s) - Removal
5. 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.

6. 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 (1) and (8) on the rear timing belt cover.
7. Remove the timing belt tensioner (12) and remove timing belt.









8. Inspect the tensioner for fluid leakage.

9. Inspect the pivot and bolt for free movement, bearing grease leakage, and smooth rotation. If not rotating freely, replace the arm and pulley assembly.
10. 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.

a. Place the tensioner into a vise and SLOWLY compress the plunger. Total bleed down of tensioner should take about 5 minutes.
b. 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.