K11 Owners Group

[1960mog]

Good Morning
2000 miles ago I installed the Purolator Facet FEP 2042 fuel pump, together with a aluminum adapter in my K1 just to test the pump.
On Friday the pump failed after riding one hour on the freeway.
The engine just stalled without warning.
I could still hear the pump running when I switched on the ignition and the engine fired 4 or 5 times when I pushed the starter switch , but it would not start.
I removed the fuel hose at the rear end of the fuel reel and was greeted by
compressed air, or better evaporated fuel under pressure.
So I switched on the ignition, expecting a steady stream of gasoline for about a second to come out of the hose, but all I got were a few drops of fuel.
After switching on the ignition 3 or 4 times the fuel pump fuse burned out.

Is the tank/fuel to hot to run this pumps? Is my aluminum adapter a heat sink and heats up the pump more then usual?
I think the pump binds up inside when it gets to hot, not producing enough volume/pressure and overloading the fuse?
The next day I bench tested the pump in a bucket of gasoline and it worked just fine.
However, I installed a other FEP 2042 in the bike and did 180 miles this morning without problems. The fuel temp. was 120 degrees measured with a infrared thermometer and the tank was almost empty.
_________________
86 R80G/S
91 K1
93 K11LT

[Scott_Anderson]

I would imagine that when the purolator pump is installed in a car/truck fuel tank that you don't have the "hot" gas(temperature anyway) issue. It's possible that it can't take the heat.
Maybe an e-mail to purolator to ask about design running conditions?
_________________
Ride safe.



1995 K1100LT 0302044
2017 FLHTK Ultra Limited
Garmin StreetPilot 2820
Garmin Zumo 550
Garmin Zumo XT
"One who does not ask questions is ashamed to learn" Danish proverb
1997 K1100LT 0302488(R.I.P.)
1997 R1100RT ZC62149(sold)

[SugarHillCTD]

I wonder if when an OEM pump gets warm/hot it expands slightly. The usual rubber mount would allow expansion of the pump's outer "shell"

With the (pretty clever) design you came up with, I could imagine the relatively thin outer shell of the aftermarket pump needing to expand but your adapter not allowing it to do so.

This could possibly cause binding of the internals which might need to expand as well?

Lots of "ifs" there.....good luck with your problem. Let us know how it goes.

John
_________________
John & Cathy

'92 K100RS4V Pearl White SOLD
'04 K1200GT
IBA Several-SS1k, BBG, 50CC NYC to S.F.

[Ernie-NH]

Hi guys...

John: The aluminum insert design that he devised has a longitudinal split so that it is not completely a cylinder.. The body of the pump is "sheet steel" and since aluminum expands at a proportionally higher rate than does steel, it is unlikely that the aluminum adapter is creating "heat induced" circumferential pressure on the body of the pump due to the split ... more likely is the temperature of the medium ( gasoline ) being pumped that is out of range for this pump due to its internal component design and subsequent heat transfer.. OR that it is out of range simply because he does not have the heat insulator sheet between the engine and the tank... any other ideas ?? It could be that the "foam adaptor" sleeves are the best solution to this adaption problem (?)

Best regards.........// Ernie in NH
_________________
AMA,, American Deaf Bikers
Airhead Beemers Club
'11 G650gs
'95 K1100LT
'76 R100/7

[acftfliehr]

I just had a similar failure recently after about a year of installation/operation I used the NAPA 2P74095 pump

It was during a lot of stop and go and the fuel tank was defiantly heat-soaked! I agree with 1960mog, that these pumps are not designed to operate with the fuel temps being this high... Maybe the BMW unit is, or it could just be a coincidence.. I installed a spare BMW pump I had from a parts bike I bought, operation normal...

Of course if anyone has any info to the contrary (that the after market pumps are good in the high heat enviro of a K-Bike Fuel tank), I would welcome it as the BMW pumps are way to high in price.

Has anyone have a good source for the base P/N of the BMW pump (Bosh P/N 0 580 463 999)?

[awshucks]

Fwiw, I did a ton of research on this idea. This is the 1st failure I've read of, so my vote goes for a bad pump.

I'm glad you replaced it w/ same. I've read of guys having over 100k on them w/ [0] probs.

I'd contact Euro Moto and ask them the failure rate w/ rubber sleeve to eliminate alum sleeve concerns...........
_________________
'81 R 100T/S
'85 K 100 RS
gone but not forgotten:
'74 R 90S
'77 R 100S
'80 R 100S

[Hobbes67]

For what it's worth, I have about 1k on a Norris pump in very hot weather with no issues whatsoever. Significant price difference from the Bosch OEM as well.
_________________
________________
Rob, Chicago, IL
Rolling Broccoli Riders
'94 K1100rs

[1960mog]

Hi
I wish I had better news to tell after the first week on my new K11LT.
My first ride was 180 miles in the early morning with no problems.
A few days later I did the same trip in the opposite direction in the late afternoon in 100+ degree temperature.

After about 2 hours into the trip and 300 miles of total riding distance a new Purolator Facet FEP 2042 fuel pump in a Euro Motoelectrics Foam Adapter Sleeve failed the same way my first pump did 3 weeks ago in my K1.
The replacement pump I had with me, was the one that failed 3 weeks ago, and it got me home the last 50 miles with no problem.

The LT runs about 10° C. cooler on the Gage then the K1, but there seems to be more heat coming out of the fairing around the legs and even up to the handle bars.

The K1 has air ducts running from the radiator to the fairing vents on both sides. My LT has non.

Is there something missing on my bike?

What kind of heat shielding is available for the tank?

Any experience with fuel coolers?

I am thinking about taking the lower fairing of to allow more air flow over the engine.

Any thing speaks against that?
_________________
86 R80G/S
91 K1
93 K11LT