Thread: Turbo oil feed

I would buy the turbo type that goes btw the twin filter housing up to the block. It is the same as on your 110 except it has a feed point at the top. Mine is fed from a banjo bold at the hose that supplies the vac pump/alternator. I think steel pipe is the norm on the high pressure/ feed side, but I have flex pipe on the return.

You can feed it from the oil filter housing banjo or a T where the feed to the vacuum pump is. Either should be fine. (there may be other locations?)

You can either use a solid metal or braided metal (flex) line. Shouldn't matter either way. As my turbo was from a silvia I took the silvia oil feed pipe in, and Pirtek sold me a braze-on fitting and some braided flexible hose.

No restrictor. You need to make the drain large and reasonably straight as the oil needs to drain freely.

Originally Posted by steveG

What are the advantages/disadvantages of the different types?

I think the only real difference is the solid tube is more durable or less prone to wear as it is self supporting and doesn't need to held or tied to anything, the braided hose I imagine would need to be routed around behind the engine. But if done properly shouldn't be an issue really.

FWIW I have the solid tube feed from the oil filters and I can't see it being an issue provided the fittings are solid, which are now since I've replaced the copper crush washers.

To hijack this thread

I have the single spin on type filter

As you can see in the photo I have my standard pressure switch mounted in the block, then another two senders on the filter housing.

I imagine the one on the cooler return pipe is temp and the other one is a pressure switch?

I'm not too keen on pinching oil from the vacuum pump.

Does anyone have a schematic on the oil system on these?

Does the oil come from the sump, through filter, past switch then to cooler? Or is it used oil, going through cooler, then through filter, back to sump?

I was thinking I may just put a 1/8 BSPT fitting in place of the temp switch and run a steel line back over to the turbo?

Thoughts?

I may have just answered my own question

I just realised there is a schematic in the Workshop Manual

Oil flows from pump through relief valve, through filter, to the cooler then to oil galleries.

Where does the factory turbo get its supply from?

I have a 1990 engine, I already have provision for the drain so I'm wondering if the pressure supply may just be capped off somewhere as well

That flow path is correct.

The factory turbo takes oil from the pipe between filter and cooler. It uses a different pipe with a port in the block that attaches to the cooler.

If you look closely, there are numerous plugs screwed into the oil gallery, the pressure switch uses one, so look there and cast your eye along the block at that height. They are plugging drill ways from the gallery to the main bearings, etc.

Originally Posted by Bush65

That flow path is correct.

The factory turbo takes oil from the pipe between filter and cooler. It uses a different pipe with a port in the block that attaches to the cooler.

If you look closely, there are numerous plugs screwed into the oil gallery, the pressure switch uses one, so look there and cast your eye along the block at that height. They are plugging drill ways from the gallery to the main bearings, etc.

Thanks for that

They would be the little cap screw plugs in the block? There are about 5 along the side of the block, you can just seen one in the photo at the end of the fuel pump.

I imagine I'd be better off using that oil as its been cooled. According to the factory schematic the turbo is fed from that oil manifold anyway, so I shouldn't have any silly problems like starving bearings of oil?

Mine looks like it was tapped. I had a new braided stainless hose made up at Pirtek with correct end fittings and length to go over the bell housing to the turbo.