Posted by Bill Radford on September 24, 2013 at 09:00:39 from (199.90.157.10):
In Reply to: Engine knock, Ford 660 posted by davisford on September 22, 2013 at 18:56:15:
My 641 recently developed a knock.Compression and oil pressure were good.Nothing strange was in oil pan. To make a long story short, it was the cam gear loose on the camshaft. A new Woodruff key, cam gear and crank gear made her like new. Also rebuilt the hyd pump. Main thing I did was get a seasoned engine mechanic to listen to the machine and review what I had found. He pointed me in the right direction and after that it was pretty easy actually doing the work. One hint: does knock go away briefy while lift is being raised? If so, the pump is being loaded and that suggests either pump gear or camshaft gear problems.Fair amount of work, but do-able.
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