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Car Forum / BMW Cars / October 2005325===1995 overheat less 3 mile
For two week this car have been over heating. Last month I replace the radiator,last week I replace the thermostat and its housing,top hole had a leak; not losing any more water but car still get hot 3.5 miles both fans are working. Air in the system. Keep refilling with water until bubbles disappear. > For two week this car have been over heating. Last month I replace the > radiator,last week I replace the thermostat and its housing,top hole had a > leak; not losing any more water but car > still get hot 3.5 miles both fans are working. > Air in the system. Keep refilling with water until bubbles disappear. ...and fill it very slowly with both bleed screws open. right... sorry I forgot that. >> Air in the system. Keep refilling with water until bubbles disappear. > > ...and fill it very slowly with both bleed screws open. > right... sorry I forgot that. so did I last weekend until I could only get 5 litres of coolant into the dam thing.... > For two week this car have been over heating. Last month I replace the > radiator,last week I replace the thermostat and its housing,top hole had a > leak; not losing any more water but car > still get hot 3.5 miles both fans are working. You might want to check the water pump is working properly. It sounds like you have a bad waterpump. The impeller on some of the waterpumps is plastic and can break. You can check this after filling up the cooling system and bleeding the air out. Just remove the radiator cap and run the engine. Rev the engine up a bit and look for coolant flowing out of the top, inside the reservoir. If you don't have any flow than the pump is bad. > It sounds like you have a bad waterpump. The impeller on some of the > waterpumps is plastic and can break. You can check this after filling up > the cooling system and bleeding the air out. Just remove the radiator cap > and run the engine. Rev the engine up a bit and look for coolant flowing > out of the top, inside the reservoir. If you don't have any flow than the > pump is bad. I have a 95 325 and have always filled it and topped it up with the pressure cap off when refilling after a flush and I have to say that I cannot detect any coolant flow (even after having just stuffed a new metal impeller wp in it). I think it's because the cap is on the overflow tank and not the actual radiator (unlike the caps in days of yore...)  Signature-Fred W Unless the coolant reservoir is cracked internally, there should be flow inside at the top. It is coming from the small air bleed hose that runs from the top of the radiator, at the left side, to the top of the reservoir ov the right side of the radiator. You do not normally see this hose, because it is under the plastic cover that covers the top of the radiator. The flow will be very low, but if you are reving the engine up while looking inside the reservoir, there will be a small stream of coolant peeing into the reservoir, about an inch down. |
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