:( hi i own a bmw 528i 1997 im bloody sick off it .the things is
overheatig its just had a new thermostat put in its been bled the oil
is topped up :( when im driving and the temp starts to go into the
red i turn the heating to full and the temp level starts to drop whats
going on can anyone plz help ive been looking for answers all day 8O
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Why did you believe that the thermostat needed to be changed? Please don't
say "because it was overheating" because many many other things cause
Did you check the thermostat for proper operation?
Why do you think its overheating ? Just because the temp gauge says so ?
Check the temp gauge....
IF it is actually overheating.....
It could be that the new thermostat is faulty - what happens with NO thermostat
It could be because e.g. the radiator matrix is full of crap restricting the
air flow through it...
It could be that the water is not being circulated properly, loose fan belt,
partially blocked waterways (unlikely)
Is the ignition timing correct ? I think too retarded ignition causes a
tendency to overheat..
I know my engine is a real sod to bleed properly/fully, so I have avoided work
that does this - is yours easy to get ALL the air out / are you sure it is bled
Hope that helps......
Is this with the AC in operation? If so, the electric aux fan should be
running all the time.
Also, the main engine driven fan has a temperature controlled viscous
coupling which should allow the fan to run at low speed with the engine at
the normal temperature to save power and noise, but lock up so it runs at
full speed when needed. And you should be able to hear this happening -
the fan makes more noise.
*Heart attacks... God's revenge for eating his animal friends
Dave Plowman firstname.lastname@example.org London SW
On my former car, an 318i 1989 I had problems with overheating. Before I
had time to check this (actually thought of replacing, or at least check
the thermostat) one of the hose in/out-lets (do not remember which is
which, the upper one it was) broke of in the plane of the radiator, i.e.
it was too hard to fix, so I bought a new radiator. After this I had no
overheating at all. So it could be that the radiator is acting up.
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