Hi, problem with my bmw is engine getting too hot after 15 mins driving, i checked colling system and egine oil, everthing is fine but one thing i realised the engine fan does not kick in when engine get hot, any ideas how to fix this problem? really appreciated... thanks

is the cooling fan cutting in ? run the engine whilst stationary with the hood up , give it a little gas 2000revs and wait for the temp gauge to rise ,the cooling fan should be heard cutting in , and off again once cooled the engine temp down ,this may take 10-15 mins but you have to be sure the fan is cutting in or you may cook the engine

My guess is that your electric fan is NOT operating at all. Under normal conditions, just going down the highway, your cooling system will function just fine without a fan running. The air flow through the radiator is adequate to keep things cool. However, when you stop, you quickly get into an "overheat" situation. Actually, you should be able to hear your fan begin operating when your engine temperature starts climbing or your air conditioner requires the fan to do its thing. Note: If you've ever severely overheated your engine, your problems may be worse than just a fan not running, but you really do need to confirm whether your fan is operating correctly, or not. Another note: I had a vehicle with a tendency to overheat when stopped. It turned out to be a faulty (leaking) pressure cap on the cooling system.

replace oil level sensor

maybe getting water into pistons and locking engine
then you leave for a while water drains away and it starts does the same thing again after 15 mins maybe

You can fiddle with thiis and check oil pressures but best is sump off, thorough clean, teardown the pump thoroughly clean it and pickup and replace it if any wear or the pressure releif spring is weak.You have given no mileage and no information on the oil used nor whether in a really hot area or 'where'?..there are several considerations ranging even into worn bearings...Of course with acceleration motor speed increases oil pressure...that's why light goes out (unlikely but possible the sender unit is faulty...but try replacement of that first if you want...) It doesn't take a lot of pump wear to cavitiate and drop oil pressures.

no it should be fine as long as you put collant in it and it is not leaking collant anywhere make sure collant topped off

The first thing to do would be to check the coolant level,then make sure the fan clutch locks up when it gets hot,if coolant is full then start the car and run it until it starts running hot then feel both radiator hoses and see if both top and bottom hoses are hot this will tell you if tstat is opening, if only the top is hot then start with a thermostant, also make sure all fan belts are on and not very loose, i've found some of these older bmw's to have bad head gaskets that make them run hot,start with the test ,and check level first.

could be the vanos making that crappy noise (which is safe and normal) or u may have a serious problem...cheapest thing to do is try a different oil/higher octane gas and see what happens, if it persists take it back in

sounds like engine management chip fault,may be worth getting checked at dealers as will show on diagnostic machines hope this helps andy

Look for Castrol TWS 10W60 Motor Oil. This car should not burn so much oil, you need to use a different kind. It is recommended by BMW as well. I also heard the VANOS isnt an issue anymore, can be fixed with a different MAFF. Good luck!