Mechanics

I WENT TO CHECK MY FLUIDS AND DISCOVERED OIL IN MY OVERFLOW TANK. IVE BEEN TOLD THAT IT THE OIL LINE IN THE COOLING SYSTEM BROKE.

1999 Cadillac Catera • 11,900 miles

There is no moisture on the dipstick or in the crank case.
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Matthewa9
October 28, 2011.



If it is brown oil, it could be most likely coming from the oil cooler in the center of the engine valley. If it is reddish(could be brown also, depending on the condition), it could be coming from the transmission oil cooler that is in the radiator. The pressures in the coolers are typically more than cooling system pressure, and that could explain leaking in one direction, and not the other.

Factoryjack
Oct 31, 2011.
Youll need to replace the radiator.

Cadieman
Nov 1, 2011.