Is it overheating? Rust can come as a result of old antifreeze being left in the system for too long, Change it every year and flush too. Have the heater core flushed at a radiator shop, they have high pressure equipment to backflush them. Bubbles are worrisome, it could be a sign of a bad head gasket, a block test kit purchased at the parts store can tell you if the head, or head gasket is leaking.
Sunday, June 28th, 2009 AT 6:14 AM