Quote:
Originally Posted by ctrlz
These pumps all seem to fail at the exact same point, 6:00 position in your photo where the metal is thinned at that semicircle for the pivot.
Despite subsequent "revisions" in the part number, I doubt they altered the metallurgy that goes into the piece that fails. That housing is breaking at its weakest point, probably due to cavitation.
A stronger casting by an aftermarket supplier is what I would go with.
My personal approach is to stick with 10w-30 for the long haul. As I have posted before, this pump we all have was originally designed to eek a few extra MPG out of the Chevy cruze, and GM subsequently plastered it across many engine platforms.
In a failed pump, it would be interesting to compare the leading and trailing surfaces of the vanes. That would be to see if there is pitting on the trailing side like you get with a boat propeller, a sure sign of cavitation.
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Regardless of what you think, the 2019+ pumps don't fail like this. I don't know what changed but they're a LOT more reliable.