Thermostat or restrictor?

[shwah]

Properly shroud the radiator to make sure all the air coming in the front of the car passes through the core.

[tom_sprecher]

Properly shroud the radiator to make sure all the air coming in the front of the car passes through the core.

+1

I don't know about VW's but when I did this and changed the oil cooler location on my RX-7 it eliminated any cooling problems I had except now it may run too cool if there is such a thing on a rotary.

[Sandro]

Shrouding the radiator makes a huge differnce. I have the stock radiator (83GTI) shrouded on all 4 sides with a slightly lower thermostat and a 1/8" hole drilled in it for bleeding the air out. With the new motor before I put the oil cooler on I had temps at exactly 190 never went over even a mm on the gauge and the oil temps were pretty high I also don't run a fan so you get much better flow through the radiator.