Crankshaft pulley

STEPHEN KARANJA

MEMBER
2004 CHRYSLER PACIFICA
3.5L
6 CYL
4WD
AUTOMATIC
140,000 MILES

I bought this vehicle with a broken timing belt. The car would crank over but would not start. I was in the process of replacing timing belt and setting it up to top dead center, but realized the crank is not turning all the way by hand. It reached a spot and stops clockwise. But will turn in reverse and the stops.I read the engine on this vehicle is a non interference engine. What else would cause this problem besides a bent valve?

3 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

Good afternoon,

You have a piston hitting a valve.

Most likely it has a bent valve or maybe several valves.

The heads will have to come off and repaired as needed for the valves themselves.

This is an interference engine. When the belt fails, valve damage will result.

Roy

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. Align the crankshaft sprocket with the TDC mark on oil pump cover (Fig. 150).
2. Align the camshaft sprockets timing reference mark with the mark on the rear cover (Fig. 150).
3. Install the timing belt starting at the crankshaft sprocket going in a counterclockwise direction. Install the belt around the last sprocket. Maintain tension on the belt as it is positioned around the tensioner pulley.

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