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|5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)|
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| Originally posted by billB@Sep 26 2004, 08:49 AM |
1. Prior to changing the resevior you had a normal range of temp. (half way) this means you cooling system was just working fine. The system includes: Thermostat, water pump; fan clutch (the belt driven one) plus the auxiliary (electrical) the latter usually doe not kick in until either you turn the AC on (you can test it that way) or if your temp. gauge goes over the half way you described in your post.
2. So before going crazy with all possibilities which means alot of $$$ why don't we do this: locate the plastic philips screw (a rather big one) with your engine running feel the upper hose (don't burn yourself) by pressing on it; if it is hard to press you know the system is building pressure and it has to be purged. Now loosen the plastic screw (be gentle or you will break it) if there is air trapped you will hear hissing noice while air is escaping out of the system...keep it loose till you see a solid flow of coolant then tighten. This means no more air. feel the upper hose again it should have gotten softer by now. Take a look at you gauges if it was climbing high it should drop to half. Again I am assuming a good working system. Add coolant as requered and enjoy.
P.s. Some cars have one screw some have 2 screws. Usually one right after the thermostat housing; the second always sits on top of reservior. As such if u have 2 start at the housing screw then do the same for the 2nd.
| Originally posted by numberthree_@Sep 27 2004, 08:42 AM |
My car has been overheating a bunch of times too (E34 525)... i finally replaced the water pump which was crazy.. I do not want to do it again.. But only about 2 weeeks later it overheated again!! I was pretty upset.. I put the car in the garage and replaced the thermostat (cut my finger open while doing that too.. oops!) which was rather easy to do. BUt it turned out to be the thermostat. Runs pretty good now! Good luck with yours!!
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