"This bulletin announces the availability of revised valve train components developed to reduce a tapping...

Bulletin number

02-146-13

Component

Engine

Summary

"this bulletin announces the availability of revised valve train components developed to reduce a tapping sound which may be heard coming from the left-hand (b2) side of the engine when the engine is warm. This bulletin does not address any cold engine or start-up sounds. The changes consist of: • design change to the valve rockers • camshaft profile change • increased intake valve stem length (1.65mm longer intake, 2.4mm longer exhaust) in addition, the insulator pad has been eliminated from the b2 intake manifold protector."

Owners of these vehicles have filed 167 complaints in the engine category.