Chevy/GMC Duramax 01-04 LB7 Discussion of Chevy and GMC Trucks with LB7 Duramax Turbo Diesel Engines

Torque spec for fuel injection lines

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Old Feb 25, 2010 | 09:52 AM
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Default Torque spec for fuel injection lines

What is the torque for the injector feed lines that go thru the valve covers. THANX
 
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Old Feb 25, 2010 | 10:41 AM
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i believe its 30lb ft using a crows foot.
 
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Old Feb 25, 2010 | 06:57 PM
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Thanx for the reply! How critical is it to torque the feed & return lines? I don,t have a torque wrench.
 
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Old Feb 25, 2010 | 09:22 PM
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too loose and it will leak and the high pressure lines will leak disel fuel into the oil. too tight and you can torque the injector so hard it will twist and it will mess up the return line seal.

the return lines too loose and it will leak, too tight and you will strip the bolt.
 
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