Question about 1996 BMW 318

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Change waterpump and refit and tenion fan belt on 318 tds

Hi just bought a bmw 318 tds 1996 the fan belt is off and the water pump is jiggley (at least i think its the water pump its behind big plastic wheelie fan type thing) (please excuse the technical jargon) How do I remove these and what do I need is this a complete water pump needed or just a bearing and how mechanical does the repairer need to be, I'm fairly good but do I need to leave it with a real mechanic. thanks.

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  • led196650 Feb 12, 2009

    yea cheers John its defenitely the water pump, I think the viscous fan can be removed by loosening the large nut behind it, but where do I go from there, and is it poss to get a schematic diagram of how the belt goes on again as I bought it without a belt.

  • John Quinn
    John Quinn May 11, 2010

    Hi Led

    More info required, are you sure the play is in the water pump, and not the viscous fan coupling ?

    Let me know !




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Posted on Jan 02, 2017

  • 96 Answers

SOURCE: hi, i have a 1995 318 tds, with poor acceleration and power

yea a wet ecu...
read below

the ecu compartment is under the windshield on the passenger side on E36

you gain acess to it under the hood....
this compartment gets wet, the ecu lays on a flat surface in that

the bottom side of the circuit board gets wet and starts corrosion.

remove the ecu, take the bottom plate off, clean the bottom of the circuit
board with alcohol and a soft tooth brush.

you should be able to see the signs of corrosion or conductive build up.

this gunk bridges solder points doing all sort s of wierd things to your
car, including false sensor readings from asc/abs controllers and other

all the way to engine failure and worst case burnt and shorted wiring

I'm on my 3rd ecu, took me and the repair boys a few years to figure this
one out.

BTW: i would get that ecu mounted above that flat surface, use some sort
of standoff to raise it so that it is not laying in the wet.

Posted on Feb 07, 2010


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