Re: oil pump rebuild questions

Posted by PackardV8 On 2010/12/13 11:35:29

I don't like doing the following but sometimes there is no other choice:

For the piston bore in the pump body take a wooden, plastic or other soft metal material like aluminum or brass dowel and cut a split in the end of the dowel about 1/2 " deep. Place a strip of crocus cloth in the slot and wrap it around the dowel. Chuck it in the drill motor. Put that in the hole and run the drill motor. PRobably have to mash the end of the dowel slot together to keep the cloth from falling out of the dowel on the up stroke.

Note that the crocus cloth polishing is only suitable for extremely minor or superficial irregularities in machined surfaces. It is NOT in any way a substitute for conditions that require major machining.

From the looks of your piston in the pictures it mite be too far gone to save. It's the bore of the pump body that the piston slides in that would have me worried at this point.