B. Camshaft Friction Gear Noise

A heavy tapping noise may be heard from the right rear cylinder head exhaust camshaft area directly behind the timing cover (Figure 5). The tapping starts during engine warm-up and the noise level can increase as the engine reaches normal operating temperatures. In some cases, the noise may begin to oscillate in 3-5 second intervals.

Using a stethoscope, or equivalent, listen to the engine just behind the timing belt area on the valve covers (Figure 5).

If a "tapping" or "clacking" type noise is heard, refer to TS8 Article 97-17-13 for the proper repair procedure.