Radiator problems that will mix fluids...
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From: Cape Coral, FL
I'm surprised you're surprised. The radiator on a Turbo has both an engine oil cooler and transmission oil cooler inside it. They are like small radiators themselves and can either corrode and develop a pin hole leak or have a seam loosen. The engine oil cooler is inside the passenger side of the radiator and the transmission cooler is on the drivers side. Each side has two hoses leading to it, one in and one out. Depending on pressure and temperature you can get almost any mix of engine oil, transmission fluid and coolant between the three. It can fool you into thinking you have a bad head gasket when actually it's coolant being pushed into the oil cooler and then to the pan after the engine is shut down and there's pressure in the coolant and not the oil. Leaking the other way you can get engine or transmission oil in your expansion tank.
Last edited by rspi; Oct 23, 2011 at 02:06 PM. Reason: new thread
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From: Albuquerque, NM
Ok, I do realize that these cars have a radiator that carry 3 fluids but why would Volvo engineers design a system that would ever risk the possibility of mixing these fluids when any mix of these fluids would cause serious damage to the car? I an only imagine that the coolant lines are seperate from the oil lines and the tranny lines. So what people are experiencing is a failure of the coolant side as well as the oil or tranny side which causes the fluid to mix. That is a heck of a failure.
I read where a guy put a radiator in his 960 and had coolant mix with the tranny right away. Destroyed the tranny. I just assumed that the company that made the radiator blended the lines somehow. This is really crazy.
I read where a guy put a radiator in his 960 and had coolant mix with the tranny right away. Destroyed the tranny. I just assumed that the company that made the radiator blended the lines somehow. This is really crazy.
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From: Cape Coral, FL
Nope, it's been done forever and by almost all car companies. If it has an automatic it almost always has a cooler built into the radiator and depending on the quality, it can leak at some point. Some of the 4X4 and vehicles that are commonly used to tow may have an engine oil cooler but they are rarer.
I was surprised with my RX-7 as it was one of the few cars I've come across with a factory trans cooler separate form the radiator.
First photo, cooler in an end cap. Second it different styles of coolers inside the radiator.
I was surprised with my RX-7 as it was one of the few cars I've come across with a factory trans cooler separate form the radiator.
First photo, cooler in an end cap. Second it different styles of coolers inside the radiator.
Last edited by Kiss4aFrog; Oct 23, 2011 at 09:37 PM.
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