1994 thunderbird. has been running fine past few weeks. made it to florida for a week and back. no problems. several weeks before, possible stuck thermostat. had a couple of backyard mechanics change...
Hello, Probably the easiest thing to do is drain the oil and see what it looks like. If it is okay, then invest in a new oil pressure sending unit and change the oil filter. For awhile there were bad Fram filters and others with bad relief valving in the oil filter.
If the oil has Antifreeze in it, then it is pretty much a given that a head gasket is bad. You should check your sparkplugs anyway for signs of water/antifreeze contamination if the engine is blowing the Antifreeze out of the exhaust. This can help show you if only one head gasket is bad or if both are bad.
I hope you either bypassed the heater core or fixed it. Another gasket that can get Antifreeze into a cylinder is the Intake manifold gasket. The newer cars usually have only air coming into the engine through this manifold. You need to look at where the top Radiator hose enters the engine. If the hose enters on the block, you are probably good for the Intake gasket.
But if the top Radiator hose attaches to the Intake manifold, a loose Intake can leak Antifreeze into the heads through the ports on the Intake. It can also cause a lack of power and poor idle. If the Intake gasket IS your problem, the head gaskets can be fine. The Intake gasket is reasonably inexpensive.
I can tell you that a loose Intake can be checked for air leaks by running the engine and spraying a water mist from an old detergent bottle around the seams of the Intake. The engine speed will change or stall if the water is drawn in. The Antifreeze leak can not be checked by this method.
I hope my solution helps you find your problem.
Jul 25, 2011 |
1994 Ford Thunderbird