Originally Posted by hanzel69

The stock pump looked fine, I don't feel like putting it back in, I don't have the time right now. I've been driving it for 3 weeks about 200 miles and it's still going. I cut open the filter, and it looked clean... I don't know what to say. I'm just going to drive it till it blows, then it'll sit for a year or two till I put a stroker in it. Thanks for all the help, but I really think I'll just drive it into the ground and worry about it when the time comes. Either way I don't have the time or money to fix it right now so...

Originally Posted by veee8

You have to keep in mind that oil pressure was good, then all of a sudden it has taken a nosedive. There is going to be a reason for this. It is correct that even for an LS1 the min. spec is 8-10 psi per 1000 rpm. BUT the fact that it had great psi one day, then 10-20 the next has to be accounted for. Sure you could shim the pump, and it might get you some psi back. It might last 15000 like posted, but what if it doesn't what if it band aids it for 15 miles and it destroys everything? Like my earlier suggestion, first thing you should do is slice open the filter, preferably the one when the problem started, and the current one. It will tell you a lot. If it is full of copper looking stuff, there is no sense in taking it further. If it does not not look too bad, you MIGHT be able to limp it by. I believe you said that you put the melling pump on there? That is already going to have a bit more psi than a stock pump, and shimming might not do anything for you.