Havepitty in W.Van

for the garret ball bearing turbos, you have

2 bigger holes for oil connections
2 smaller holes for coolant connections

does it matter which one of the holes is used for oil inlet or outlet?

i have rotated my turbo, hence what would normally be oil outlet on the turbo has become oil inlet and vice versa for coolant lines as well.

i don't think it matters but wanted to be 110% sure before i went out and spend my time and cash to have them custom made.

thx guys.

Audi2ptzero

You clock the turbo by removing the bolts on the back of the housing and rotating the housing to where you need them.

xr4tic

one oil hole is much bigger than the other.

I haven't seen the ball bearing ones, but usually the inlet is made for the pressurized oil supply, and the outlet is made for draining hot frothy oil.

It shouldn't really matter, as the center section can be rotated separately of the turbine and compressor housings.

sw20T

DON"T MIX THEM UP!!

The smallest hole is the oil supply line. It should be facing up (when you clock the turbo). The hole opposite that (at the bottom) is the oil out line.

The two that are the same size (now on the sides) are the H2O lines. It doesn't matter what one of these is in or out.

Havepitty in W.Van

i explained wrong about the oil and water line, but i know which one is which.

so for the water, it doesnt matter which is in/out.

but for the oil, i should try to make the flanged hole the oil outlet by rotating the center section.

btw, does the turbo and manifold bolt have to be a special nut? i lost few and was wondering if its ok if i just used a pinched nuts.

xr4tic

but lost a few, and just used regular nuts. The dealer wanted over $3 for each nut, I told them "no thanks".

As for the turbo, I use bolts. I'm sure regular nuts would be OK, but pinched nuts won't hurt it.

Havepitty in W.Van

i'll just use high strength grade 1 or 2 nuts.

thx for the info.

ps i lost lots of nuts and washer down the engine somewhere, it gets frustraiting when you drop and you cant find.

sw20T

water in and out don't matter which one is which.

Havepitty in W.Van

ok, thx. they looked identical so i guess it doesnt matter

Mat Indukts Lambos

Sounds like you're there, just listen to John ;-)