Oil pump drive.

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Oil pump drive.

Post by ColAro on Fri Apr 10, 2015 11:20 pm

After finally completed the body work, I am now having engine noise / rattle especially on moderate and higher revs. Aside of this noise, the engine still performs good, no lack of power, no smoke, good mileage (40ish mpg), and no overheating. The rattle seems to be coming from the lower end of the engine. How is the oil pump driven in a 3 cylinder carb engine? Is it driven by a chain and sprocket? Is it common that these components wear/fail and cause this notorious rattling noise?

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