Right, the sport went up to about 3/4 ont he temp guage today in traffic and I've never seen it that high before, It never went above half even when stuck in traffic on a hot day.
Anyway, I can stop the fan with my hand so I presume the coupling thats the cause of the problem. coolant seems to be pumping ok and heaters work fine.
I know its just a big nut but do I take off the rad in order to get access? Is it just a simple swap job?
overheating > fan coupling > how to change
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slinky2000
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Last edited by slinky2000 on Sat Feb 16, 2008 6:34 pm, edited 1 time in total.
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slinky2000
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sorry m20 2.5
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kam-325i
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Ok.....
Is an easy job.
The rad can stay on. If you have the cowling on the rad, this wil have to come off.
Just unscrew the big nut off the water pump, there is enough room between the rad and fan to pull it out. just remmember its a left hand thread.
Is an easy job.
The rad can stay on. If you have the cowling on the rad, this wil have to come off.
Just unscrew the big nut off the water pump, there is enough room between the rad and fan to pull it out. just remmember its a left hand thread.
Pete don't care about colour, He would shag a rainbow if he could find the end of it....
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slinky2000
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ok thanks I'll have a look tomorrow to see 
when you say "Just unscrew the big nut off the water pump" does the pump need to come off?
when you say "Just unscrew the big nut off the water pump" does the pump need to come off?
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kam-325i
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No. The pump will stay where it is. The end of the pump shaft has the thread on the end.
Pete don't care about colour, He would shag a rainbow if he could find the end of it....
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slinky2000
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got ya! cheers
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slinky2000
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bmwe30mtech
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The way to do it is a hard sharp hit with a hammer (on the spanner). Force is not what is needed, and as said, remember its a reverse threaded nut.
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1989 325i Sport M Tech II, Diamond Black/Black leather
As Kam said above its quite easy . 32mm spanner required IIRC.kam-325i wrote:Ok.....
Is an easy job.
The rad can stay on. If you have the cowling on the rad, this wil have to come off.
Just unscrew the big nut off the water pump, there is enough room between the rad and fan to pull it out. just remmember its a left hand thread.
have fun.
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You say the spark's gone
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tomtomtom
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correct it is a 32mm spanner, i did this job today, piece of p1ss, took 10 minutes, it takes longer to unscrew the 4 bolts that hold the fan to the coupling than to actually take the thing off.
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duke_rattlehead
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sorry to ask this question as its probably been asked to death, but how do you stop the water pump shaft from rotating when you try to undo the 32mm nut? I have tried cable tying the fan belt and wedging a spanner on the pulley but neither are strong enough to stop it rotating.
EDIT: with the use of mole grips and a BFH it came off quite nicely
EDIT: with the use of mole grips and a BFH it came off quite nicely
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slinky2000
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lol nice one mate, I just got my machenic to do mine while he was doin a few other jobs.