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| Water in fuel question http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=27797 |
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| Author: | GilaMonster [ Fri Dec 21, 2007 5:57 pm ] |
| Post subject: | Water in fuel question |
I'm getting a strange vibration/hesitation between 45-55 during acceleration. I seemed to remember that some were getting air in their fuel system and that might be what is causing my experiance. I bleed the fuel filter head about 2 shot-glasses full of fuel and there is an amount of water on the bottom about the size of a quarter. Due to this, I unscrewed the water drain on the fuel filter (not really reading anything, just doing it like an idiot). Then I proceed to bleed the filter head again. Just barely a drop of water at the bottom of the fuel sample of the same size. What I'm wondering is if the bleeder is upstream or downstream of the fuel filter from the fuel tank? I did not get a WIF indicator, so I'm hoping the bleeder is before the filter from the fuel tank and that is why I found water without getting any WIF. Or, is my fuel filter so full of water that it passes through? Can anyone please clarify this for me? Thanks and Merry Christmas! |
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| Author: | Joe Romas [ Fri Dec 21, 2007 6:17 pm ] |
| Post subject: | |
The bleeder screw is on the clean side, pump side, of the filter element and the water drain is on the dirty or input side of the filter. To get water out of the bleeder screw and not have the WIF light on worryies me about the ability of the WIF detector to detect water  I've purposly left out up stream/down stream to eliminate confusion 
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| Author: | retmil46 [ Sat Dec 22, 2007 3:21 am ] |
| Post subject: | |
Joe Romas wrote: The bleeder screw is on the clean side, pump side, of the filter element and the water drain is on the dirty or input side of the filter. To get water out of the bleeder screw and not have the WIF light on worryies me about the ability of the WIF detector to detect water
I've purposly left out up stream/down stream to eliminate confusion Beg to differ. Bleed screw on the stock filter head is on the dirty/fuel tank/inlet side of the filter. |
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| Author: | onthehunt [ Sun Dec 23, 2007 8:06 pm ] |
| Post subject: | |
Quote: Beg to differ. Bleed screw on the stock filter head is on the dirty/fuel tank/inlet side of the filter.
Joe is right. No way the filter would bleed otherwise. |
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| Author: | Goglio704 [ Sun Dec 23, 2007 8:17 pm ] |
| Post subject: | |
Bleeder is on the dirty side. I just checked my old unit with the burned up heater. I can post pics if anyone wants to see 'em. |
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| Author: | gmctd [ Sun Dec 23, 2007 9:40 pm ] |
| Post subject: | |
Posting the pics would be very illuminating - the air-bleed tap is usually post filter, such that the entire element can be completely purged WIF drain is dirty side, with the water separation pre-filter element. |
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| Author: | Goglio704 [ Sun Dec 23, 2007 10:12 pm ] |
| Post subject: | |
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| Author: | BlackLibertyCRD [ Sun Dec 23, 2007 11:39 pm ] |
| Post subject: | |
A picture is worth a thousand words. |
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| Author: | gmctd [ Mon Dec 24, 2007 12:35 am ] |
| Post subject: | |
Still not clear - let's work thru this logically - The cannister is empty, having just been changed, or somebody ran out of fuel (snicker!) You press the prime pump - the one-way inlet valve from the tank closes, pump volume is displaced thru the open one-way outlet valve to the CP3 - release the pump, the one-way outlet valve to the CP3 closes, the one-way inlet valve from the tank opens, and atmospheric pressure pushes fuel from the tank into the now lower pressure in the fuel head - fuel enters the 'dirty side' under atmospheric pressure, only (pre Cummins, of course) Continue pumping till the filter and head fills and is pressurized - time to bleed the compressed air volume to allow the head to top up - there is pressure in the head, the feed line to the CP3 is pressurized - there is no pressure in the feed line from the tank - where is the one-way inlet valve located? If it is in the inlet port from the tank, then the entire head is pressurized, even the dirty side, and air may be bled from the dirty side |
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| Author: | Goglio704 [ Mon Dec 24, 2007 9:44 am ] |
| Post subject: | |
The discharge check valve is visible in this pic. It is the silver disc opposite the bleeder. There is an intake check valve visible way back in the inlet port. Sorry, no way to photograph it. 
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| Author: | gmctd [ Mon Dec 24, 2007 1:52 pm ] |
| Post subject: | |
That'll work - thanks - the fuel inlet appears to directly feed the prime pump - the prime pump feeds the large area above the heater puck - the bleeder port is located in the top side of that area, which should allow fuel fill to above puck level. I had plans to drill\tap that flat on the front of the head for a permanent pressure guage - now plans are to replace the head with the Cummins version, but I can now see that flat would not have been a good location, as the guage would have been in the 'dirty' pre-filter side - much better for longevity to be in the post-filtered side |
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| Author: | GilaMonster [ Mon Dec 24, 2007 10:21 pm ] |
| Post subject: | Thank You |
Goglio704, thanks for posting pics to clear the matter up. It is reassuring to know that the bleeder is on the dirty side after finding some water like I did. Thanks to all for information on this and all matters I ask about at this great forum. Merry Christmas! |
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