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Old 11-02-2012, 12:37 PM   #368
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Join Date: Oct 2008
Location: TX-DFW
Posts: 1,099
My Ride: E46 3-Pedal Mafia
Originally Posted by love2drive330CI View Post
Ok...going outside the box with me as my brain is always looking for a way...sometimes it goes astray.

If the fuel pump is a mechanical failure, inside of it somewhere is the fault for failure. Perhaps if there are brushes in it like the alternator has the voltage regulator; anyone ever look into that or consider the root cause of the pump failure by dissecting it? I am thinking something wore out/wire/brushes etc. but the casing is probably still sound.

I know we can say it is easier to replace it with a new one at a cost of approx $120.00 but if the part inside failing is replaceable and say $5.00 that would help the cause. I only say this from when I dissected the buttons to our windows and noticed that it was a tear in the rubber like boot that caused the window failure; which could be fixed by repairing the rubber break or making a little molded piece out of silicone.
(or how Raj figured out the o-rings to the vanos)

I will open up my failing pump once I get my replacement but for the record my expertise is not really down the mechanical alley. I enjoy it for the tinkering and learning and sharing of information.

So has anyone opened up a failing/failed pump to identify the "root" problem?
I have, the problem is the brushes are worn inside the dc motor, also the dc motor is pressure sealed and once you force it open it's hard to re-seal it the way it was (if not sealed properly the flow rate will be compromised) .

It would be far better to just find a new dc motor with the same specs as the old one and just replace that part.

If anyone knows where to find just the new dc motor let me know.
Who has the skills?
e30 project

"May GOD grant you DOUBLE the amount you wish upon me!"

Last edited by Eliott's-BMW; 11-02-2012 at 01:26 PM.
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