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If it is like my current problem, Ihave a BAD O-Ring on the plug near the driver side of the pump...the plug has the long tang on it...O-ring was shot and it leaked a lot of oil but still ran well.
tried to replace the o-ring but apparently there are two different types of plungers under the plug. The old pump I have had a square plunger but this had something else that disappeared when I pulled the plug...
Wouldlove to find an exploded view of the HPOP so I can tell what this peice looked like.
Am having to put old pump back in whil I wait for another eman pump. The pump that developed the leak was a reman that I putin last year. This plug had the threads stripped on it so it was never tight and I did not check it before installing...after 9 months it loosened up and destroyed the o-ring...
Now I have an expensive repair for a 60 cent piece.