I have a 2003 318i I am losing water from the engine and it has started to overheat.I replaced the radiator cap as it appeared damaged but it has not resolved the problem.I am wondering if there is a common problem with water loss in th enegine.I previuosly had a 2000 318i and had a similar issue and the head gasket had to be changed.Is this something that they give trouble with Thank you David Butler
Have a compression test done to check for head gasket or cracked head
SOURCE: 2001 subaru outback overheats
It could be the water pump, radiator, or cooling fan not working properly. If your heat is off it will not be the heater core.
SOURCE: Engine oil moisture
Known issues or not,It sounds like the head gasket is blown,or it has a cracked head.If it was water it would be thick and light grey in color on the dip stick,But yellow indicates antifreeze leak that has not had time to mix with the oil.
SOURCE: oil leak and orange oil light stays on briefly
why eliminate head gasket? head gasket failure can cause loss of both fluids. i suspect the oil light is lost oil pressure because the head gasket is toast or the head is now warpped and thus leaking. you should be able to see signs of leakage around the head.
do you see any oil getting into your rad? if not then the oil must be leaking around the head.
SOURCE: bmw overheating
could the timing be too far advanced ??does it need bleeding ??is thermostat the right way round?'
SOURCE: My 740 1998 BMW overheats?
3 blown out radiators....define this. My accord has 224,000 miles on it, same radiator, same clutch. And the beemer blows radiators? Makes 'em explode? Can't imagine anyone making a radiator that blows up all the time. You keep buying the same model?
Anyway, check: air gap in system, bleed the system while it heats up. Water pump. don't see it being replaced. the older ones had plastic impellers. is the auxillary fan working? It should come on all the time when the A/C is on. Clutch on belt driven fan ok? put in a 12 degree cooler thermostat and drill two 3/16" holes 180 degrees opposite each other.
Blown head gasket or two can cause overheating. Bad timing. did you change a good or bad radiator sensor? how'd you test it to determine it was bad? Don't just replace parts, determine they're bad. Replace enough parts and $14,000 later you should be ok.
Testimonial: " I feel with your suggestions, I will be able "finally" to resolve my overheating issues. It could be one of three things, blown head gasket, bad timing or water pump. I will check to find out which one of these problems is the root cause of my overheating. Thank you very much for your suggestions."
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