Quote:
Originally Posted by turbophil
Good call Tim. I didn't see a thermostat type valve when I had the engine out, but I didn't look 'that' close either. I'm still curious why they didn't use a sandwich type cooler on the car and use the coolant to cool the oil. The water lines are already on the car for the TRD type sandwich cooler. They're the ones that are simply U'ed right above the filter that are known for leaking  |
Actually, in the Celica, that oil does use a water (coolant) cooler. The hoses that are there is route to the coolant to the oil cooler. It is an effective way to warm up the oil, and then to cool it. But it adds to the radiator requirements since it must now handle the additional heat from the oil cooler. It also has to controlled by a thermostat since you want coolant to run about 195 degrees, and you want the oil to be 20 degrees or so higher.
Lotus actually removes the oil to water cooler and replaces it with the adapter to the oil cooler lines. That's why we have the U-tube. I don't know if the engine comes that way from Toyota or if Toyota uses the engine in another car without the cooler. The U-tube was a way to bypass the removed oil cooler, but has the problem of rubbing on the adapter that sticks out more than it would without it being there.
In the diagram below, we have the hoses in the red "circle" and the U-tube, but we don't have the oil/water heat exchanger - we have all the rest...