E36 318Is Strange Whining....... Fuel Pump?

[E36-Steve]

Hi guys,

I always had a it of a whining noise coming from somewhere behind me when only just touching the accelerator in 5th a 50-60mph ish. But now I've noticed it when I'm high revving in third under load.

My initial thought is a fuel pump? Anyone have any ideas?

At first I thought it was just because my car is stripped that I could hear it, but now it's started doing it in third (only high revving) I'm thinking it might be the pump on its way out or something.

Steve

[DB1]

That maybe the diff. when last was the oil changed or topped up, it might not cure the whining but it's worth

doing especially if the car been driven in a spirited manor on a regular basis.

[E36-Steve]

Spirited..... I like that haha. But when I accelerate even the slightest amount in 5th it stops or if I'm completely off the accelerator it doesn't do it.

Could this still be the diff?

[Guest DazH]

First thing that popped into my mind when I was reading this is

"Diff"

[E36-Steve]

Well it would be good in a way if it is as I'm just waiting for my input flanges to turn up and my new diff is going in :).

On another note I'm trying to look into some power flex diff bushes. Thought it would be a good idea to do while I'm swapping the diff. But as I'm still new to the BMW I'm not sure what one's I need. Can only seem to find compact diff bushes and the power flex website confuzzles me lol.

Any help would be much appreciated.

[Guest DazH]

Here ya go bud

http://www.realoem.com/bmw/partgrp.do?model=BE72&mospid=47426&hg=33&fg=30

[E36-Steve]

Cheers mate. Still a little confused as to what bushes I need for the diff. Sorry if it's me being un bmw educated lol.

[Guest Mr.Beemer]

the symptoms you described for your noise is not the fuel pump!

I agree with the above posters, its most likely the diff.

check if its leaking or change the fluid to a slight thicker grade - -_-

worst case change the diff - like you are doing so :P

[E36-Steve]

Cheers for the replies. Now I no that I probably should have taken my diff out and welded that one as the one I welded was probably in better condition haha.

Oh well you win some, you loose some. I'll still split the original one when I get it out to have a little look.

I'll keep everyone posted.

[DB1]

Spirited..... I like that haha. But when I accelerate even the slightest amount in 5th it stops or if I'm completely off the accelerator it doesn't do it.

Could this still be the diff?

Yep.