Has anyone had any experience with worn oil pump chain or sprockets on the 3.5/4.5 engines? Mine is a '72, and I certainly needed cam chains and sprockets, and wondered if the oil pump chain and sprocket set up might also be expected to be worn out at the same time. I'm still tryiing to track down an elusive whine in the engine, especially when warm. I have already eliminated all the hang-on accessories.

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Berfinroy in CT
Present vehicles:
1973 300 SEL 4.5
1959 Rolls Royce Silver Cloud I
1959 Ford Thunderbird convertible/430
Past vehicles;
1958 Bentley S 1
1976 ex-Max Hoffman 6.9
1970 300SEL 2.8
1958 Jaguar MK IX
1961 Jaguar MK IX
1963 Jaguar E-type factory special roadster
1948 Plymouth woody
1955 Morgan plus 4
1966 Shelby GT350H Mustang

I bought a new crank gear for mine for when I change the chain. I would think the crank gear would wear more since it is smaller and revs twice as much than the cam gears.

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Tony H
W111 280SE 3.5 Coupe
Manual transmission

Past cars:
Porsche 914 2.0
'64 Jaguar XKE Roadster
'57 Oval Window VW
'71 Toyota Hilux Pickup Truck-Dad bought new
'73 Toyota Celica GT