Model A Engine Noise and worn timing gear

[Davidgay]

Originally Posted by Special Coupe Frank

Sounds like the cam thrust plunger is either stuck in its bore in the timing cover, and/ or the spring behind it is broken.

Replace Cam gear, Thrust plunger, and spring.

Bet your "bearing knock" goes away.

Went through this on my '28 Coupe last summer. Replaced the ancient & failed Fibre gear with an aluminum cam gear, plunger, and spring from Bratton's. No more "bearing knock".

Also no excessive noise from metal cam gear.

Frank. You are the man. Took your advise and the noise is gone