Goodbar6

iTrader: (1)

Ok, on the turbo II cars, the stock turbo is oil and water cooled. The water that comes from the lower intake manifold needs to be blocked when you get an only oil cooled turbo.
My question is, is that port, off the LIM, before the thermostat or after? It would be nice to be able to put the water temp sender there.
Thanks
Tyler

HeffBoost

The only thing cut out of the loop by the thermostat is the radiator.

RETed

Why?
If you're going to block it off, then it's sorta like a dead end.
We stuff the aftermarket water temp sensor right after the thermostat cause it's the hottest parts of the engine and will tend to show the most accurate water temps.


-Ted

NZConvertible

Actually it's oil lubricated and water cooled. The water does the bulk of the cooling and the turbo would quickly fry without it even with the oil flowing.

As Ted said, it would be a dead end and hence would not resond properly to actual engine temps. Bad idea.

White_FC

As much as i'd hate to disagree with someone across the tasman, the oil does cool the turbo quite sufficiently.
I ran mine without it for a couple of months, no ill effect on the bearings.
Same with a cousin of mine, did it to his for a good year or so.

NZConvertible

Interesting to hear. I still wouldn't call it "sufficient" cooling though, since water-cooled turbos have much lower oil flow than older air/oil-cooled turbos. I certainly wouldn't do it or recommend it.