Engine - Noise From Timing Cover Area

SOURCE: Subaru Tech Tips

TITLE: Engine Noise - All H6 Vehicles

APPLIES TO: All 6 cylinder vehicles except SVX

SERVICE TIP:

If you encounter an H6 engine with a noise coming from the front timing chain area and suspect it might be caused by the timing chain tensioner, please follow the instructions below. SOA has tried this procedure and found it to be an effective fix.

Repair Procedure:

1) Start the Engine
2) Raise engine RPM's under cold condition, up to 5000rpm 3 to 4 times.
3) Confirm whether the noise is eliminated.
4) If the noise still exists, repeat above procedure again.

If you cannot eliminate the noise with above procedure, replace Chain Tensioner.