KevG
Registered user
Hi,
Just wondering if a rubber boot, or similar, would stop the fuel pump controller failing?
Kev
Just wondering if a rubber boot, or similar, would stop the fuel pump controller failing?
Kev
Waterproofing FPC
- Thread starter KevG
- Start date
EasySushi
Registered user
It might if it's water ingress that's causing the problem, if it's overheating or some other failure mode then maybe not.
KevG
Registered user
ACF-50 is available in Hein Gericke...for about £11/12 I think....top stuff though.
I agree that as yet the cause for so many FPC failures has not been conclusively identified. However the fact that the BMW rectification for the fault is to fit a new gasket between the unit and the fuel pump housing suggests that BMW at least think that preventing ingress of fluids to the lower part of the unit, will be of benefit.
The new gasket rubber was a recall from a long time ago.
If you read Tim's thread it's not water ingress that is causing the bulk of the problems......... it's the unit failing electonically.
I made a couple of "umbrella"s for these out of a 2 litre coke bottle
IF you park the bike on the sidestand with the bars turned to the left the rain hits the handgaurds and dribbles down into the pump well
So I made the coke umbrella like a tunnel and secured it thru the original vent cover at the front and rear and left it raised in the middle So it's like an aircraft wing with the front and rear parts lowest and the wing "aerofoil" running across the frame
Hence cooling air circulates easily and any water from whatever source goes elsewhere
IF you park the bike on the sidestand with the bars turned to the left the rain hits the handgaurds and dribbles down into the pump well
So I made the coke umbrella like a tunnel and secured it thru the original vent cover at the front and rear and left it raised in the middle So it's like an aircraft wing with the front and rear parts lowest and the wing "aerofoil" running across the frame
Hence cooling air circulates easily and any water from whatever source goes elsewhere
Earlier GS's has a cover for the fuel pump controller and later GS's do not. This would suggest that BMW want the controller to breathe/cool 
Big Lee
Registered user
Earlier GS's has a cover for the fuel pump controller and later GS's do not. This would suggest that BMW want the controller to breathe/cool
It suggests to me some more cost cutting. If a breeze of 40 or so mph can`t keep it cool where it`s at even with a plastic cover on it`s a bad do. I`ve covered my vent holes with tape on mine to stop water running in.
Have followed Tim's thread with great interest, as I've suffered 2 failures, and would prefer not to have a third. My fourth controller is in the top box ready! Despite what Tim infers, there is no direct evidence as to the cause of failure of so many units. Until definitive proof of the cause is available then it is all a matter of speculation. I merely pointed out that in 2005 BMW seemed to think that water ingress was at fault.
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The bottom of the FPC is a rubber seal which is about 2-3mm thick. When my FPC failed I dug this out to see what was underneath. Basically the FPC is a single PCB with a heat sink on top and the rubber seal underneath. The seal showed no sign of damage and given that it is additionally protected by the gasket I doubt (IMHO) that it's water ingress that's to blame. Also, there are several reports of brand new bikes with less than 600 miles on the clock breaking down with FPC failure.
BMW updated the FPC controller earlier this year, some time around April/May. I don't know the cut-off on VIN numbers but I am waiting to see whether any bikes with the later part number fail. I am hoping we won't see any and that BMW has finally resolved the problem with new build bikes.
Tim
BMW updated the FPC controller earlier this year, some time around April/May. I don't know the cut-off on VIN numbers but I am waiting to see whether any bikes with the later part number fail. I am hoping we won't see any and that BMW has finally resolved the problem with new build bikes.
Tim
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