recurring hpop leak at block.$$$ help

[cbubac]

Well heres the saga, I towed by buddies truck back to him on my trailer (6hrs)in the 75hp setting ts chip. No leaks at drop off. Then on the way back I bumped it up to 100hp. When I got home it was dark and I didn't notice the leak. The next morn there was a 6" puddle under my truck on my old mans nice clean concrete. I took it and let them install new O rings and base plate gasket. After my next trip in the 100hp setting it started leaking again. The mechanic advised me before to replace the hpop while it was out (I chose gasket) and now im looking at a pump. You guys think the generic ts chip caused this and obviously should have it tuned, or is my hpop at fault? Both times the leak was at the matting surface between pump and block.

[dray8165]

I don't understand how a chip could affect that. The chip could change the IPR position, raising pressure on the output side of the pump, but that would only affect the HPO lines, and maybe some of the plugs on the high pressure side. The gasket you mention is on the low pressure side. Nothing the chip does could affect that. Maybe you should do the job yourself with quality parts from dieselorings.com - replace all the gaskets and o-rings while you've got it off.

[cbubac]

I went ahead and replaced the pump with one from dieselspecialists.net reman unit. It crunk right up after 10 seconds and idled smoothly. After I clean the block off tomorrow im gonna recheck for leaks and go from there. Unfortunately I was inpatient and didnt wait until tomorrow when I would have had a siphon pump to use and got oil all over the valley and pump before removal, so I can't be certain where the leak was, "non servicable plug" or matting surface.