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Old 08-14-2009, 12:44 AM   #1 (permalink)
brightnow
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leaking diesel filter housing 6.5

6.5 turbo diesel, 94 chevy truck

I smelled diesel at first, couldn't see anything though. Then, I drove the truck a few miles and smelled it again, I looked underneith and it was dripping diesel pretty bad under the truck.

I looked around a while to see where it's dripping so much from. I think it's the diesel filter housing but can't verify yet. I don't think it's the fuel line's but It could be, but does'nt look like it.

Does anyone have experience with this?

thank you.

David in Florida.
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Old 08-14-2009, 12:59 AM   #2 (permalink)
matuva
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Probably the fuel filter housing as you bet.
The culprit is very often the seal at the bottom. That seal is mounted to ensure leak proof at the fuel heater element which is going in the center tube of the fuel filter housing, less often, this is the heater element itself..
Quick fix, just a few messy when fuel filter housing is mounted with short hoses.
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Old 08-14-2009, 02:12 AM   #3 (permalink)
tigert
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filter leaks

Lots of stuff here on that ! your 94 needs new flex lines anyway, make the new lines longer. Mount filter on standoffs and then you can see/feel the problem ,IE leaking out of heater wires, leaking from water sensor, put some 2/6 planks across the fenders, remove the 15mm bolts to the filter and replace all the lines to and from the filter. I used metric lag bolts, some washers, on 6"by1/2" aluminum tubing. get diesel and or biodiesel rated lines!!! The planks will help get to the line to the injector pump once the filter is out of the way. mine had a 5/16 hose clamp at the pump which I removed with a ratchet wrench (kelsey Hayes brake tool) Tite fit but one can snake under the intake to reach the clamp, going from the back forword. I also put a tee in the line and a fuel pressure gage under the dash while I was there, (surplus center.com $20.00) not pretty but now have no doubt as to where to start troubleshooting. 2 years later all is well. Good luck!
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Old 08-14-2009, 12:32 PM   #4 (permalink)
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Did you just change the filter or something? or it happened all of a sudden.

Check if the filter is seated properly first.
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Old 08-14-2009, 04:28 PM   #5 (permalink)
sirdiesel
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Try the simple stuff first

Mine leaked also and it was a stripped hose clap on one of the fuel lines. My bet it is something similar or a break in one of the fuel hoses. Once you get the bolts off to the fuel filter it is an easy inspection. Good luck.
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Old 08-14-2009, 07:08 PM   #6 (permalink)
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mine was a o ring that seales the heater on the bottom of the filter
Just get a new o ring and you are back in business
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Old 08-14-2009, 09:02 PM   #7 (permalink)
monkeywrench14
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Mine did the same thing. I pulled the filter housing and the inside of it was rusted and the seals were bad. I ordered a new unit from gm parts direct.
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Old 08-15-2009, 01:38 PM   #8 (permalink)
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So have you found out where your leak is bright?

I'm going to be looking into my leak today lol... It is either coming from a leaky line, leaky connection at filter housing, or something leaking on the housing. Only leaks when the truck is off and I lose pressure after sitting... Leak isn't big enough to suck in to much air to stall truck (yet) but does cause hiccups every once in a while... Just glad I don't need to take off my intake to run the new lines .
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