Rebuilt my engine about 6 weeks ago and didn’t know that I shouldn’t modify my oil pressure regulator. We modified it to bump up the oil pressure. Without no restrictor in the oil feed line, oil was pushing out of my front turbo.


We made a restrictor in the banjo bolt by threading another bolt inside the banjo bolt and drilling a hole in it like so. This is version 2 of the restrictor. Version 3 has a .065 hole and I am still getting some oil through the turbo seal. It’s not leaking like the pic above but it does smoke out of the tail pipe under hard boost.


I’m assuming if I continue to drive it hard, I will eventually damage the turbo seals and it will smoke even worst?

.065 is a tiny hold and not sure if going to a smaller hole will help. Do I have any other options besides pulling my engine out and replace the modified oil pressure regulator with an un modified unit?

 

I would be fixing or undoing whatever work you did to the regulator. Putting an orifice into that banjo bolt is just a bandaid for the overall problem.

If the turbos are seeing that high of an oil pressure, what about the rest of the engine? OMP? It really needs to be fixed back at the source.

 

What did you modify? The pressure regulator on the rear iron? Drop the oil pan and put a stock regulator back in.

 

Why did you modify it in the first place?

 

modified the regulator on the rear iron. U think i can undo the motor mounts and get the engine high enough to drop the pan? I dont have a lift and doing to stuff on the ground would suck and i really dont want to pull the engine out.

My father in law is used to building NA engines and when he builds them he likes to increase the oil pressure.

 

Drop the subframe to get to the oil pan.

 

^ thanks, saw a thread around that and will prob go that route when we have some nice weather here in TN.

 

People mod the regulator on n/a motor to get more oil pressure. Unless you are building a race car that will consistently see 10,000 rpm+ it is not necessary in an fd.

 

with the FD they increased the oil pressure to be the same as the older race engines.