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Split fuel filter
- Thread starter 130253
- Start date
scott.lambert
New member
Wow.
No.
No.
pglaves
#13338
When BMW first came out with the K bikes the filters were stamped with part numbers - stamped into the metal as opposed to painted or printed on. The things split frequently. They went to printed marking.
Nonetheless, the filters do break occasionally in both K bikes and Oilheads.
Is that an OEM filter? If not, what is it?
Replace the filter. Then if it were my bike I'd give it a fuel pressure test by "T"ing into the fuel line from the pump before the regulator. I forget the spec - something just a bit under or over 40 psi for sure but I forget if it is 42 or 36 - one for oilheads and the other for K bikes. If it is much higher it is a regulator problem.
Nonetheless, the filters do break occasionally in both K bikes and Oilheads.
Is that an OEM filter? If not, what is it?
Replace the filter. Then if it were my bike I'd give it a fuel pressure test by "T"ing into the fuel line from the pump before the regulator. I forget the spec - something just a bit under or over 40 psi for sure but I forget if it is 42 or 36 - one for oilheads and the other for K bikes. If it is much higher it is a regulator problem.
pglaves
#13338
Probably a defect, but I would check the pressure, or have it done at a shop.
dieselyoda
Active member
Yep, what he said:
The filter will take almost 200 psi. I know that for a fact. It won't take any amount of water in the fuel to start the aluminum oxide corrosion, that you can see on the nipple of the filter in the picture.
It also can't take more than a few minutes of "surging" in the fuel system. Something like a chattering pressure relief regulator kills them pretty quick.
Best to get the system checked thoroughly. But, then again, I was a Bosch rep for the last little while dealing with warranty and yours is no real surprise. Bosch makes very little on their own. Most of Bosch is outsourced.
That is an old filter by the way. The stamping didn't contribute to the failure. "Buy Bosch, It's German Engineered", made in Mexico.
The filter will take almost 200 psi. I know that for a fact. It won't take any amount of water in the fuel to start the aluminum oxide corrosion, that you can see on the nipple of the filter in the picture.
It also can't take more than a few minutes of "surging" in the fuel system. Something like a chattering pressure relief regulator kills them pretty quick.
Best to get the system checked thoroughly. But, then again, I was a Bosch rep for the last little while dealing with warranty and yours is no real surprise. Bosch makes very little on their own. Most of Bosch is outsourced.
That is an old filter by the way. The stamping didn't contribute to the failure. "Buy Bosch, It's German Engineered", made in Mexico.
beemerphile
New member
One simple thing that can do that is if the supply hose isn't fully "clicked" at the disconnect. It would be pumping into a deadhead. But usually a hose blows off.
roger 04 rt
New member
When my hose split, same type of thing. Your cat turned bright red due to the mixture getting so lean it misfired, leaving gas and air to burn in the cat. Cost me a catalytic converter on my Xterra when it happened and I ignored it ...
happy wanderer
Day Dreaming ...
In case you pressure test.
R oilhead regulator: 3 bar or 43.5PSI
K bikes: 3.5 bar or 50.7 PSI
Not sure but I think if you measure pump side you'll see higher pressures than above.
Post regulator side should be close to spec.
I was toying with the idea of mounting a k bike regulator in my RT to see what would happen.
R oilhead regulator: 3 bar or 43.5PSI
K bikes: 3.5 bar or 50.7 PSI
Not sure but I think if you measure pump side you'll see higher pressures than above.
Post regulator side should be close to spec.
I was toying with the idea of mounting a k bike regulator in my RT to see what would happen.
