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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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  #1  
Old 09-24-2013, 05:25 PM
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Default LB7 tear down

well guys it's time just put it in my dads shop we are tearing it down Thursday to replace all 8 injectors
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Old 09-26-2013, 10:20 AM
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so far two hours in
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  #3  
Old 09-28-2013, 08:34 PM
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got it all the way down ordering parts Monday after work
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Old 10-04-2013, 06:52 PM
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well I thought I would have ordered parts already but I ran it to a snag had to buy some tools anyway all 8 cups stayed in any idea of where I should get my injectors I was thinking about here Duramax LB7 Fuel Injector

also how do I do a egr delete on it?
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Old 10-04-2013, 10:22 PM
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I would do the cups while your there... save ur self the irritation of having to do it again ... cheep insurance policy .... and thier cheep enough
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Old 10-05-2013, 01:10 AM
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Originally Posted by 4x4manonbroke View Post
I would do the cups while your there... save ur self the irritation of having to do it again ... cheep insurance policy .... and thier cheep enough
that is debatable. many experts would likely agree that if they did not come out and not loose then no need to replace or reseat them.

for injectors, merchant auto is a good place.

this is another good one; Web Store - Lincoln Diesel Specialties

2004LB7's Sig:2004 LB7 Duramax, EFI Live with DSP5 upgraded Tune
stage 4 SC transmission,5" exhaust
160 lift pump, homemade dual fuelers
water injection, 305/70/16 tires
all built up from a salvaged vehicle by me
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Old 10-05-2013, 02:31 PM
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I need some more help guys. my turbo seems to be "throwing oil" into the boost tube on the drivers side and turbo looks covered in oil inside I just noticed today when I was cleaning parts to get ready to put it back together. what could this be bad seals failing turbo ect? and this is a Texas truck and has a egr should I delete it and if so how would I do it. I know how to on a gasser but no idea on a D-Max. also all 8 cups are crazy tight
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  #8  
Old 10-05-2013, 03:07 PM
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check for play in the shaft. in/out, side to side. there may be a little side play but should be virtually none on the thrust bearings. the seals can still be bad with out any play but if there is any play then you can be certain of it

instead of deleting the EGR, consider adding a blocker plate and tuning it out

as for the cups, looks like you can leave them alone. just make sure they are clean inside before putting the injectors back in
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Old 10-05-2013, 07:00 PM
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I broke down my LB7 most of the way this morning, but I have a couple questions. How did you pull the injectors without upsetting the cups? What tools did you use to disconnect the fuel QD's? I went with a set of injectors and glow plugs from Pensicola diesel. Reviews were pretty good and couldn't beat the price for the set and seal kit. Let me know how the reassembly goes.
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Old 10-05-2013, 10:51 PM
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alright I'll check my turbo tomorrow. how much would it be to tune the egr out? also I was thinking about porting the intake horn while i have it torn down. and is there any other mods I should consenter while it's torn down. thanks for the help 2004LB7

---AutoMerged DoublePost---

I used a kent more injector removal tool with a 2 foot breaker bar with a 3 foot cheater bar. the tool cost me $108. the fuel lines I used my dads fuel line kit idk what it's called but it slides into the quick canector and you just pull it lose. I'm only 16 so I'm not sure what the other tools are called I used some special tools tho for different things. it helps my dads a ret mechanic he had every tool I needed but the injector puller. as far as keeping the cups in it's grit your teeth and hope your lucky

Last edited by Walker.B; 10-05-2013 at 10:51 PM.. Reason: Automerged Doublepost
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