:humm: Fuel line leaking :humm: well what do you know.........keep us posted :c:
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Originally Posted by tiremann9669
(Post 978749)
:humm: Fuel line leaking :humm: well what do you know.........keep us posted :c:
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Let me just say this....if its leaking fuel, its more than a 90% chance its sucking air. Thats the reason why when you test things for leaks, you use a regulated air source. Air will find holes that liquids wouldn't think about coming thru.
In these older trucks, if in doubt, replace it. If a fuel line in hard, replace it. If its got dry cracks in it, replace it.... If you see a dry cracked rubber brake line going to your front brakes, you'll replace it, right? Do the same for the fuel lines.... Check valve in the return line is a +. I replace all the mechanical lift pumps I can get with quality electric pumps. A busted diaphram will pump your crankcase full of diesel. Plus when old, you loose pressure. A electric pump will prime your filter faster pressurizing your line with the switch being turned on, plus I wire them into a Hobbs Switch. You loose oil pressure, it kills your motor...simple, safe insurance. |
Originally Posted by Screamin' Metal
(Post 979634)
Check valve in the return line is a +.
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A check valve in the return line should stop air from leaking back into the system if the return line is not submerged in the tank.
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Originally Posted by blackduck
(Post 979644)
A check valve in the return line should stop air from leaking back into the system if the return line is not submerged in the tank.
Have you ever seen an injector taken apart? Good place for a check valve is about three inches BEFORE the VP inlet. |
Originally Posted by NadirPoint
(Post 979691)
Hmmm, interesting. You know injector pop pressures run in the thousands of psi, right?
Have you ever seen an injector taken apart? Good place for a check valve is about three inches BEFORE the VP inlet. |
MMMMM my bad, I did not know the ONLY return line came from the injectors.
And yes I have had injectors apart, put back together and run. |
Originally Posted by Screamin' Metal
(Post 979634)
Let me just say this....if its leaking fuel, its more than a 90% chance its sucking air. Thats the reason why when you test things for leaks, you use a regulated air source. Air will find holes that liquids wouldn't think about coming thru.
In these older trucks, if in doubt, replace it. If a fuel line in hard, replace it. If its got dry cracks in it, replace it.... If you see a dry cracked rubber brake line going to your front brakes, you'll replace it, right? Do the same for the fuel lines.... Check valve in the return line is a +. I replace all the mechanical lift pumps I can get with quality electric pumps. A busted diaphram will pump your crankcase full of diesel. Plus when old, you loose pressure. A electric pump will prime your filter faster pressurizing your line with the switch being turned on, plus I wire them into a Hobbs Switch. You loose oil pressure, it kills your motor...simple, safe insurance. |
Originally Posted by Screamin' Metal
(Post 979696)
I used to work at a shop reworking pumps and injectors....25+ years....for diesel trucks and cars.
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