Thats makes a lot of sense, I connected the one in the rad up but it just didn't seem adequate to me
I do a lot of towing so I will put a engine and trans oil cooler on.
Do you think I need a thermostat on the trans cooler?
Dean
If you do a lot of towing - definatly increase the oilcooling capacity - so it will be equal to what is found in the factory GD250 thru GD300. I have a seperate VDO oilpressure gauge in my vehicle. And can therefore see what happens with water temperature and oilpressure when the oil thermostat reaches it's working temp. There is quite the difference in water temperature when the oilcooler starts to draw out engine heat.
I don't know the requirements for a transmission thermostat. I just know that some of the mysterious "why is my engine running hot" issues that where with GDT290 and GD350 (the old one), can be caused by excessive heat being dumped in from the autobox.
I know of one case where a Bosch specialist ran a GDT290 for 3 hours on a dyno to investigate. They found a defect autobox reaching 240 degrees celsius when they really pushed it. Engine and engine oilcooler was in perfect condition - it was the autobox that overloaded the system.