Oil Pressure issues

[Thuppu]

It's a Garret middle part and yes, CT uses identical middle parts. Have a CT waiting for installation, need only to change the DP flange. Have also new oil-lines with a restrictor and inline filter, so I hope the oil pressure raise when I change the parts...

Sorry for the OT.

[rs200]

I taught it is CT.. because the midle part (for oil and water) are very simullar..

[Thuppu]

what kind of turbo is that?

Old and in bad shape T03/04 Garret/Turbonetics Hybrid

[rs200]

what kind of turbo is that?

well my car always get 5 bar when the engine is cold.. than slowly drop on 1bar, but if I give them a little gas, they amediatly jump on 3 bar ,and when I drive the car they where around 2-3bar , and on WOT 4 bar.
is that ok?

[Thuppu]

No M10x1.0 is fine thread like your flywheel bolts brake pipe fittings etc..

Yes, it was M10x1. Got all parts for the tester from our local hydraulic vendor.



Have also some small issues with the oilpressure. With hot engine on idle I get <1,5bar, on 2000rpm's ~2.2bar and max. pressure I get is ~3.5bar. Changed the oil 5W-50 and filter for about 2000km back and with new oil the pressures was ~1,8 and max. 4,5bar.

Before that in the summer I used 10W-60 oil and had a similar oilpressure drop after ~4000km...

Never had full 5bar pressure with hot engine, only on cold starts with new oils. Maybe my issue is result of too great oilflow in turbolines...

what is the size that the holset oil inlet has? I remember my mechanic mentioning that he had the inlet slightly reduced in size to overcome that problem with oil being low on pressure because of the turbo having large diameter tubes!

...or what do you think of this oil inlet? No restrictor.

[rs200]

yesterday.. I sow the same issue on car. very hot engine on idle it have 0.5 bar.. my oil is 10w-40..
an I have on my car OEM Audi oil filter.

[Billman]

Mine had 4 filter changes till now all Mann with correct part numbers.

[AndyP]

Mines had 3 oil changes now, 2 with Audi filters and 1 with a Mann. Made no difference, thanks for the suggestion.

[Pirvu Eugen]

Common subject but I need advice:

New built engine (stoker) and with low quality 10-40 oil an now with mobil 1 5w-50 still I get 0.8 bar at idle with warm engine. At 1500 rpm I have 1.8 bar and so on.

Is it common on new engines?
What should I check?
Can it be that further use the pressure will rise or is it something else?
Can it be that the sender is faulty?
Should I go to thicker oil like 10w-60?

Regards

Vasilis

Sorry for the stupid ideea.....but...you tryed to change the oil filter and see the result?
The valve inside the filter can get stuck slightly open and the oil pressure will not be enough.
Just a thought!
All the best!
Eugen

[JP]

doesn't M10 mean 10x1,5?

No M10x1.0 is fine thread like your flywheel bolts brake pipe fittings etc..

[AndyP]

What is the oil pressure sensor thread size? Need also to check the pressure with a gauge.


Edit.

Seems to be M10x1.

I think it is M10x1 and it's not tapered like most fittings. I could not get a fitting for the gauge so I cut the end off an old pressure sender and TIG welded it on.

[Billman]

doesn't M10 mean 10x1,5?

[Thuppu]

Yes, I had this made at the local hydraulics place



It only confirmed what the gauge in car was reading.

What is the oil pressure sensor thread size? Need also to check the pressure with a gauge.


Edit.

Seems to be M10x1.

[AndyP]

Thank JP, great information as always.

I already have the gaskets, just got to get hold of some squirters now. I'll let you know if it resolves the issue.

[Jonnybravo]

Cool let us know if it resolves the issue as it is the only thing left that would make an obvious difference as I remember in the old days when we were still trying to get 500-600hp out the cossie lumps we used to play with the squirters to adjust oil pressure

Didn't know you were into the old boat anchors, oil pressure can be a big issue on the old yb though.