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Technical Info: 3rd Generation: NON-DRIVETRAIN Technical discussion of third generation (2003 - 2006) non drivetrain questions, solutions and upgrades. Please -- DO NOT post drivetrain discussions in this forum!
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Old 09-26-2006
CTD CTD is offline
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Default Fuel drain manifold line.

This is going to sound stupid but, what does the fuel drain manifold line at rear of cylinder head do on the CR trucks?
The rail and injecters are a closed system, yet located at the back of the block is the above mentioned line.

Any info woul dbe great.
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Old 09-26-2006
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Default Re: Fuel drain manifold line.



Just looking at the picture, I think it is supposed to drain off any leakage where the fuel supply tube contacts the side of the injector. Just a guess!!!
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Old 09-26-2006
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Default Re: Fuel drain manifold line.

great picture.
now it has got me wondering, are the tubes allowed to leak? This puts an end to the possible way that an undertorqued feed tube could allow fuel to leak into the sump.

So many more questions now, is this what it really is for, or is this a generic drain port for other fuel systems on these trucks?

If the tubes leak then you will have poor running conditions, a drop in psi as they will always be leaking.
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Old 09-27-2006
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Default Re: Fuel drain manifold line.

Could it be an overpressure relief?
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