Tensioner

TENSIONER

CAUTION: The 4.0L is NOT a freewheeling engine. Therefore, the valve train rocker assemblies must be removed before attempting to rotate either crankshaft or camshafts independently of each other.

CAUTION: If camshafts have moved from the timing marks, always rotate camshaft towards the direction nearest to the timing marks (DO NOT TURN CAMSHAFTS A FULL REVOLUTION OR DAMAGE to valves and/or pistons could result).





1. Make sure the crankshaft sprocket (10) is aligned with the TDC mark (9) on the oil pump cover.
2. Make sure the camshaft sprockets (2, 7) timing reference marks (1, 8) are aligned with the marks on the rear cover.
3. Make sure the timing belt (4) is around the tensioner pulley (11).

NOTE: It is necessary to compress the plunger into the tensioner body and install a locking pin prior to reinstalling the tensioner.

4. Hold the tensioner pulley against the belt and install the reset (pinned) timing belt tensioner (12) into the housing. Tighten attaching bolts to 28 Nm (250 in. lbs.).
5. When tensioner is in place, pull the retaining pin to allow the tensioner to extend to the pulley bracket.
6. Rotate the crankshaft two revolutions and check the timing marks on the camshafts and crankshaft. The marks should line up within their respective locations. If the marks do not line up, repeat the procedure.





7. Reposition the oil cooler hose retainer bracket (1) near the timing belt tensioner and install bolt (2).
8. Install the front timing belt cover Engine Timing Cover(s) - Installation.
9. Connect the negative battery cable.

NOTE: The Cam/Crank Variation Relearn procedure must be performed anytime there has been a repair/replacement made to a powertrain system, for example: flywheel, valvetrain, camshaft and/or crankshaft sensors or components Programming and Relearning