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

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How long and difficult will it be to replace the injector cups? I'm under the assumption that 1 or more is leaking coolant and pushing it through the lower valve cover...anyone ever heard of this? Sent from my HTC Liberty using Tapatalk... JOIN NOW TO REMOVE TRACER

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  #1  
Old 01-01-2012, 01:08 PM
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Default Injector cups

How long and difficult will it be to replace the injector cups? I'm under the assumption that 1 or more is leaking coolant and pushing it through the lower valve cover...anyone ever heard of this?

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sutie's Sig:1996 Dodge 2500 4x4: Ext Cab, long bed, 1 Ton Dana 80 Axles, Bull Dog 150, P7100 19.5* advanced, modified plate, Full Cut DV's, 4GSK, Haisley HD valve springs, Hilux Street Cam, 80HP Injectors, 3 Piece AFE manifold, AFE Intake Plennum, AFE Intercooler,64/71/14 over S480 Compound Turbos, 5" Turbo back, triple disk converter, billit input/output shafts, 84" Trac Bars, Bilstien and Carli Suspension mods with BDS Steering kit.
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Old 01-04-2012, 03:20 PM
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The same time involved for changing injectors

I would check balance rates first so if you have one or two injectors going south you can kill two birds with one stone.
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Old 01-04-2012, 03:20 PM
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If you've done it before 8-11 hours depending if you have egr or not.
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Old 01-04-2012, 03:21 PM
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Took me most of a weekend my first time.
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Old 01-04-2012, 03:59 PM
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should take 4-6 hours, what makes you think the cups are leaking?
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Old 01-04-2012, 04:45 PM
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Do you get fuel in your oil? And in the cooling system? You should also have some what sweet smelling white smoke if they are bad enough. And im with fox2boost. i would make sure the injectors test out well before you do the cups to kill 2 birds at once. And if they test out good then you can get new cups and use a merchant install kit like this one below.
Merchant Automotive 10058 - 01-04 GM LB7 DuramaxLB7 Injector Install Kit

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Old 01-05-2012, 10:26 PM
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Injectors are all good, I got them replaced about 6 months ago. I'm thinkingn that one of the cups isn't seated right now and its causing coolant to leak. Just recently I noticed a little by the egr cooler, so I think I'm gonna block off or remove the cooler completely and see if this fixes it. Any suggestions???

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Old 01-07-2012, 01:38 AM
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Originally Posted by MillerBoyzDiesel View Post
should take 4-6 hours, what makes you think the cups are leaking?
I would really like to see you torque everything correctly and have it back together in 4-6 hours.
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Old 01-10-2012, 10:31 AM
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well stop by sometime and ill show ya
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Old 01-10-2012, 04:19 PM
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Keep typing.
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