I've been waiting to get my car back for weeks. The guy finally finished installing my new motor and everything this weekend. Fires the thing up, runs and sound loud and good but there is no oil pressure...basically he said I have a bad oil pump (the oil pump is new) and now he has to take apart the whole engine to get to it and fix it meaning I gotta cough up about 600 more dollars!!! Anyone had this problem before with an oil pump? It's a ported ls6 oil pump

 

I doubt it is the pump if it is new.

Maybe he broke the oil pressure sending unit behind the intake.

 

Who built the motor? Thats a good place to start.

 

What oil pump? If its new then either he messed it up or he messed up the O-ring.... or the sending unit is bad which he would also could have messed up.

 

If the sending unit is bad, doesn't it just shoot up to max psi? That's what my friend's did on his vette when it broke. If not that, I'd bet it's the O-ring.

-J

 

it was built by ls1 performance. I bought the engine off of a guy on here that got it from them. I have my own mechanic doing all the work. I just called my mechanic and he said thats what he first thought so he checked it out and said that was fine.

 

said the oil sending unit*

 

probbly a pinched oring would be my guess highly unlikely that a new pump would be junk. not saying it isnt just very unlikely. also he doesnt have to tear apart the whole motor just pull out the stuff to get the front cover off. like 2-3hr job tops

 

Sending oil unit... If its not that, then maybe the engine builder forgot to install the plastic oil plug (barbell). This has made life difficult for a lot of people. Who built the motor? Was it a reputable shop?

 

ls1 performance built it

 

why dont you find a shop with a manual oil pressure gauge that can verify that you do indeed have pressure... or you could just pull a valve cover and see if it makes a mess

 

I bought a new LS6 oil pump and it was bad. Figured it sat on the shelf to long even had rust spots on the back of it when I got it brand new.

 

Bad as in reduced pressure? or no pressure? I cant see a couple rust spots keeping the pump from pumping anything what-so-ever...

 

I wasn't saying that the rust spots was the culprit, just stating the fact that it did, and I bought it new for which I wouldn't think there would be any. Also very low pressure. When I got my new one I tested it and put oil in it an spun it for which it shot the oil out for which my other new messed up LS6 oil pump had it dripping out. There is always that one in a billion that has something messed up and that was just my day.

 

two things i have seen make a brand new oil pump bad 1. the inside cam gears are seized because it was improperly ported and not cleaned thoroughly afterwords, and my very own because i did not prelube the inside gear and it just locked up and would not spin its a easy mistake costly though i cant really see anything else because its a fairly simple device but anything is possible i guess

 

So your mech verified the no oil pressure with a stand alone gage setup??? I'd have him show me in person. Besides as stated before changing out an oil pump should only take 2-3 hours anyways and at a std 70-80/hour I still only see 240 in labor, should be able to recover 80% of your new oil....