North American Turbocoupe Organization



Turbo oil return line question
RDOG Offline
Posting Freak
#1
Is the oil return line pressurized? I plan on routing my catch can to the oil return line so I dont have to empty it- just allow it to drain back into the oil pan via the turbo oil return line.

Routing: I will rout a hose from the valve cover to the top entry line on the oil catch can ad the other line at the top to a breather. Then instead of having a plug at the bottom of the catch can, I will route a line to the oil return line.

How does this sound? Will it pressurize the oil return line even though I have a breather for the can? Let me know because I am going to have a custom line made.
1986 Turbo Coupe. Boport StageIII head, Boport 2.1, Performance Techniques 50 trim hybird, StageII.63, stinger 3" exhaust, Phenolic spacer, Boglog header,NPR FMIC intercooler setup, kirban fpr, bigrmotorsports fuel rail, diablo water meth kit, CAI, remote mount TFI, CHE rear adj control arms, MAC girdle, 8.8 rear disc, aluminum drive shaft, H&R lowerings springs Tbird Turbo Specific, y MAS!!
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Joe F Offline
Posting Freak
#2
The oil return line is going to be at whatever pressure the crankcase is at, since that's where it drains to. This can be a problem for turbos if there are very high pressure levels there, since that pressure travels up the return line and in turn pressurizes the center section of the turbo. Long story short, that can force oil out the seals and destroy things.

HTH.

------------------
Joe F.
JR's Aerie - Our 3 TC's

[This message has been edited by JoeCool (edited 07-19-2005).]
JR's Place - My '87 Turbocoupe
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RDOG Offline
Posting Freak
#3
Joe, basically what I am going to do is have stinger modify a line to have a second port for my oil ctach can line. The line I am talking about is the short return line he sells on ebay. I already have this line in place so it would be an easy quick swap.
1986 Turbo Coupe. Boport StageIII head, Boport 2.1, Performance Techniques 50 trim hybird, StageII.63, stinger 3" exhaust, Phenolic spacer, Boglog header,NPR FMIC intercooler setup, kirban fpr, bigrmotorsports fuel rail, diablo water meth kit, CAI, remote mount TFI, CHE rear adj control arms, MAC girdle, 8.8 rear disc, aluminum drive shaft, H&R lowerings springs Tbird Turbo Specific, y MAS!!
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