Save yourself some money! Ford says the HPOP rear cover is a non-serviceable o-ring. We have seen the rear cover leak time and time again. Instead of replacing the pump, we have the HPOP seal fix!
https://zzdiesel.com/products/high-pressure-oil-pump-cover-seal-powerstroke
SKU: ZZ-0097
Our High Pressure Oil Pump, HPOP, Cover Removal Tool make this job easy! Use this suction tool to remove the cover when replacing the cover o-ring seal.
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