High volume oil pump problem?

[Jeepster4wd]

well i put in a new motor about 10k miles ago or so and i am having some issues with what i think is my oil pump. i went and put the high volume pump in there. and im getting some wierd sound coming from the distrib area. it only does it for 5 mins or so when i start it up and i notcied my oil pres flucuating alot. like 40-60 back n forth sometimes. iv heard of some issues like the pump shaft exsploding and such. and this is in my 93 xj 4.0

[Gerr]

I had a ford 5.0 do that and it was a bad pressure relief valve

[Dr. Dyno]

well i put in a new motor about 10k miles ago or so and i am having some issues with what i think is my oil pump. i went and put the high volume pump in there. and im getting some wierd sound coming from the distrib area. it only does it for 5 mins or so when i start it up and i notcied my oil pres flucuating alot. like 40-60 back n forth sometimes. iv heard of some issues like the pump shaft exsploding and such. and this is in my 93 xj 4.0

Before you blame the oil pump, verify the oil pressure readings with a mechanical gauge. The problem could simpy be a bad dash gauge sending unit.