Here are a few photos so you know what I'm talking about. shows a newly installed OEM plastic ring and also the new updated solid aluminum ring. Chevy and Ford trucks since 1985 use a hydrid that's diffferent then both, but I don't get into all that. When new, that plastic ring is white or clear color. Once it gets a few years old, it turns almost black. When it falls apart, all you find is little black bits inside the pump - thus my term of "mouse turds."Bingo.... mouse turds.
Bottom line... please help me out here.
The photo showing the very worn rivet is what happens to a pump that gets run a long time after the plastic ring has broken - which might be your case.
The OEM plastic ring fastens two steel plates together via many rivets. The plastic absorbs vibration. When it breaks, the rivets start to hammer and hit each other. Eventually, if run too long, they break off and metal runs through the pump.
By the way, I'm not trying to discourage you from sending the pump out to a shop. Problem is however, the most now adays do not fix pumps on a case-by-case basis. Most will just charge you a very high flat-rate price. Most pumps that only require $25 in parts and an hour's time on the bench, get price tags for up to $800 - and that is rediculous. If you can find a small shop actually willing to fix your pump as needed with a shop rate of somewhere around $80 an hour, it would be worth it.
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