Radiator fan not working.. blown oil cap.. connection?

Hello,

Not sure if I titled the subject line well enough. Anyways, my oil cap recently blew off... though I recently purchased the car used, so I wasn't the one who put it on in the first place. Needless to say there's oil all over half my engine block, and even a bit on my windshield. To top all this, my rad fan isn't working (not the fuse). I've been driving the car every day for a week without the fan, and the car is running pretty hot. I'd say on average around 100-105 degrees celcius. It was only today I finally checked to see it wasn't working. Even more so, I am experiencing some electrical issues. The negative connection on the battery will cut out every so often and I can't start the car without fiddling it a bit. Or my speed sensor bugs out.

With all these little things I'm wondering if this just comes down to the fan. Would operating the car at such a high temp without the fan going mess up the sensors and wiring? Would it cause the engine to have more pressure and blow the oil cap?

Thanks Can't help you unless you tell us what the year, make, model, and engine size is.

I can tell you this though. If you keep driving it without the fan working and the temperature getting around 221 degrees F, your going to pop that engine. discretesignals wrote:Can't help you unless you tell us what the year, make, model, and engine size is.

I can tell you this though. If you keep driving it without the fan working and the temperature getting around 221 degrees F, your going to pop that engine.


Yes, that much is certain. I checked the fuse.. it must be the fan motor, I hope. I'll replace it ASAP.. but I'm from Canada, and the weather is getting cold.. so that's helping prolong that issue. Its a '98 Cavalier Z24 (2.4L) with a rebuilt engine, with about 45k kms on it. Just wondering if it's possible for oil pressure to increase if the engine runs at that kind of temperature. Or if maybe it was just a fluke thing and the cap wasn't on properly. More than likely the oil cap wasn't screwed on properly. The chain sits right under the oil cap hole, so I am sure it made a nice big mess Excessive oil pressure won't cause the oil cap to blow off. The cap has threads and if there was excessive crankcase pressure for some odd reason it would probably blow the hoses off the oil/vapor separator first.

Just because the fuse is good doesn't necessary mean the motor is bad. The motor gets power from the cooling fan relay. The relay is energized by the engine computer when the temperature gets to a certain point or the air conditioning is running.

You need to make some circuit checks to find out what is really going on before condemning the motor. That's unless you grab the fan and it is locked up.

You should also fix your battery connection problem. Maybe the battery cable bolt is stripped out and needs to be replaced.Car Repair Talk's forum.