Typically, the chain guides need to be replaced due to wear. With the cam covers off, rotate the engine clockwise until the notches on the camshaft meet up with the notches on the cam towers. Read the number on the crank damper, use chalk to make them visible. Depending on the number, the closer to zero the better, start by rewplacing the chain guides. If the offset is still high, the chain will need to be replaced. The sprockets may need to be replaced too if the tips are sharp instead of flat on the ends.

I'll post a link later.

__________________
Regards

Warren

Currently 1965 220Sb, 2002 FORD Crown Vic Police Interceptor

Had 1965 220SEb, 1967 230S, 280SE 4.5, 300SE (W126), 420SEL

ENTER > = (HP RPN)

Not part of the in-crowd since 1952.