fuel leak
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Lead Driver
Joined: Sep 2005
Posts: 9,399
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From: Norco,CA
fuel leak
After going to the mountains in my 2004 CC LB 4x4 set for three days I have a big fuel leak. It sets on top of the motor and runs down. Anybody have any idea's? I just looked after getting home two days ago and don't see it now. But it leaked big time just driving a mile to my dad's house. When we got home from work and looked for the leak, it didn't leak after setting four hours. It is a 6.0 diesel.
Fleet Owner
Joined: Nov 2003
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Turning the key on will activate the fuel pump for a bit (15-20 seconds or thereabout). Look for the leak then (ie do not crank the engine).
Also, why would it leak just sitting there? There is no pressure on the fuel system after shutting the engine down.
Also, why would it leak just sitting there? There is no pressure on the fuel system after shutting the engine down.
Fleet Mechanic
Joined: Jul 2018
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From: Jacksonville Florida
Sounds like it's not leaking unless under high pressure. I'd look for signs of fuel around filter housing and check line connections and go ahead and put a new Blue spring upgrade in.
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Lead Driver
Joined: Sep 2005
Posts: 9,399
Likes: 188
From: Norco,CA
Thanks guys but I couldn't feel it or see it once it set for four hours. But just driving a mile to dad's it leaked good. I guess I am going to have to drive it then try to find it. It's running down the back but the top was full of diesel.
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Fleet Owner
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I just think the idea of driving with a significant fuel leak (he stated that it leaked "big time" and "the top was full of diesel") is not prudent. I also think that a person should be able to find a leak of any significance without the minimal heating that goes on (California truck). As for vibration, I don't see a typical engine to have that much, but I guess it could (it would be abnormal). Anyway, a person can add movement manually (with minimal prybar action) if a line or a regulator cover is loose. It appears that the OP hasn't even tried the "key on" attempt to keep pressure on the system long enough to find this "big leak". Maybe an inspection mirror would help - who knows!
Afterall, a person can't observe the engine when driving, so eventually the inspection will take place with a stationary truck. Clearly the method of "driving it and then observing the mess", hasn't proved successful so far.
As you said - just my 2 cents as well.
Afterall, a person can't observe the engine when driving, so eventually the inspection will take place with a stationary truck. Clearly the method of "driving it and then observing the mess", hasn't proved successful so far.
As you said - just my 2 cents as well.
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Lead Driver
Joined: Sep 2005
Posts: 9,399
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From: Norco,CA
No I haven't tried the key on yet, I just let it idle for a while. As far as driving it then inspect, I haven't done that either because of time when it happen. Going to work. I will try these in the next couple of days and report back what I find. So far, there are fuel lines that run to the front of the engine to banjo bolts, and banjo bolts on the back of the head. Seems to me it has to be fuel filter lid or something to do with that or fuel lines. I say that because of fuel on the top of the valley.