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Hello, I have been dealing with my Z for couple of months due to oil smoking from the exhaust. I have tried nearly everything I could come up with but I would like to ask, if the line route from scavenge tank hooked up like this can make my turbo smoke?
The turbo is journal bearing (tested at stand two times to see if it is blown but there are no leaks), I added a check valve at the drain line and also at feed line and also installed OPR V2 to control oil pressure to 40 psi and there is also a 1.5mm restrictor on the turbo feed. A scavenge pump is placed under the driver headlight from which the line goes to oil pan spacer.
At startup there is zero white (oil) smoke comming from the exhaust, after warm up still no smoke but as soon as I rev to around 3000 rpm the smoke comes. Smoke is not thick white but it is there. I would also mention, that the car is not tuned yet due to oil problem.
Could you please help me since I have no other solution what can cause smoking ? Thank you.
The engine was rebuilt around 6000 km before and there was no smoke from exhaust. Coolant was not disapering and oil was not watery. I also changed oil when I was instaling turbo and then once more due to modification which required to drain oil and it was nice and clear without coolant.
According to check valve on drain line...without it, oil completely flooded turbo, oil was pouring out from the inlet turbo exhaust flange. (Turbo was dissambled and cleaned right after that. Engine was not started with flooded turbo)
I just noticed the pump is mounted under the headlight.
The oil can not drain up; that drain needs to fill up completely to reach the pump before the pump works.
EDIT* The self priming feature on your pump only works 3ft. How long is your drain line to the pump?
Last edited by iideadeyeii; 10-25-2023 at 09:16 AM.
Well, thats the parameter that I must overlooked. I think, that pump is around 5ft from the turbo. I searched, but I cannot find pump wich can pump oil more then 3 ft from the tank. Can you recomend some? I was thinking about turbowerx, but it is expensive for me just try if it helps. There are many builds, which have turbowerx pump at the same place as I mounted mine and seams to work fine.
I have a question. Self-priming up to 3ft means that the line lenght from scavenge tank to pump must be shorter then 3 ft or that pump cannot be higher than 3 ft above the scavenge tank under the turbo ?
10-25-2023, 04:20 AM
Low mount turbo smoking
