No oil pressure in rebuilt engine

[ENGINR]

Am asking for a friend - he told he that he'd rebuilt an old motor for his rally car and now can't get oil pressure. He's saying that the pump is brand new and that he's getting oil in the oil filter, but his oil pressure gauge and sender are telling him that there's no pressure in the system.

Any thoughts?

I was thinking that it might be a blocked oil gallery, but I seem to recall somebody else on here talking about a similar problem and am wondering what they did to resolve it.

 

[DOUGMO]

very common man

bjp and I made a special accumulator to prime the motor with oil.

I take it the motor is in the car? because the best way is to prime the motor prior to fitting the timing belt. undo the oil feed off the head for the turbo and see if oil comes out of there too.

took me ages to get pressure.

 

[Paul]

Is it a 4g63?

With the timing belt on:

- Undo the oil pressure sender out of the filter housing. You'll need a fitting to put in here to connect a piece of hose to. The fitting in the IM that connects the hose from the brake booster fits perfectly.

- You'll need a decent size bottle with hand pump to connect to said fitting with some tubing.

- Fill the bottle with oil and pump it up until you can see it come out of the rocker arm under the oil cap. It will get noticeably harder to pump.

 

[bazeng]

Danny from Springy showed me a way where he just disconnected the oil filter housing pressure sensor and connected a barb and pumped it with a hand oil pump until oil came out of the turbo feed line.

Cranking it over just didn't want to build pressure.

Simple but it worked!