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Re: Re: Re: Ford 330 HD Gas Engine
Posted by John McPherson on December 22, 2003 at 14:31:57 from (220.127.116.11):
In Reply to: Re: Re: Ford 330 HD Gas Engine posted by LAW/MN on December 22, 2003 at 14:14:43:
It is quite common for higher mileage Fords to have wiped the babbit off of the mains and or rod bearings.
While not common on that low of mileage, it can happen if the engine overheated.
If you switch to a mechanical direct reading oil pressure guage you would have a better idea of where the oil pressure actually is at when running.
One way to check for adequate oiling/oil pressure is to slow the hot engine idle down almost to the point of stalling, and listen for a sound similar to the stuck lifter noise, but lower down in the engine. If the rod bearings have lost their babbit, you will hear them make some noise. As long as you do not run the engine very long at that low of an idle speed you are not likely to damage anything.
If the engine performance is otherwise good, you can drop the pan and put in new rod bearings and a "high pressure" oil pump, and at least inspect the condition of the mains if this condition is a great concern. I have swapped mains with the engine in place on two other Fords with little trouble, but with sometimes the crank needs to be turned by hand to get the pan to clear the counterweights.
Otherwise, the bearings can run on the copper cladding for quite some time with no more problem than noise at slow idle. I have worked on a few Fords that partially wiped the babbit off of the shell inserts at about 75,000 miles. Engine still ran good, but was noisy at idle with 2.
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