Replacing one injector? - Chevy and GMC Duramax Diesel Forum

01-04.5 LB7 Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

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post #1 of 17 (permalink) Old 12-08-2012, 07:43 PM Thread Starter
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Replacing one injector?

Just bought a good truck a while back it has a slight blue white haze once in a while took it to 2 different shops had balance rates checked and a po. 304 code came up number 4 miss fire and balance rates came back good except this one was higher. You can feel it miss fire once in a while when sitting at intersections then it clears up and seems to be good. I was wondering since its so close to xmas I was thinking of changing just the one for now. Would this fix my smoke issue for the time being both shops wanted 3500-4000 to change all four on that side seems a bit high? Thanks

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post #2 of 17 (permalink) Old 12-08-2012, 07:49 PM
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With the amount of work required to replace injectors on an lb7 I would do all 4 while your in there. I wouldn't want to tear it down again a few miles later to do the other 3.

Jacob
2008 SLE GMC C/C.
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post #3 of 17 (permalink) Old 12-08-2012, 07:54 PM
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X2 atleast do one bank but obviously would be best to do all 8

2004 lb7 ccsb 4x4. Efi live tuned by Rob at ATP, Built trans by Brad at Calvins Auto, Wehrli custom fab s475/stock twin turbo kit, ARP head studs, tie rod sleeves, cognito idler/pitman arm braces, cognito traction bars, airdog 165, turbo horn, LML driver side manifold, cat fuel filter adapter 1r-0749, installed cab lights and tow mirrors. NBS back seats. 6 inch zone offroad lift lowered down and running 305/55/20, optima red tops, Mbrp 5 inch turbo back straight pipe exhaust.

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post #4 of 17 (permalink) Old 12-08-2012, 07:54 PM
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For that price most shops do all 8. I have seen people do 1 at a time, but afterone is replaced another goes within a few weeks to months. Its alot of work so it would be cheaper to do at least 1 side if not both.

-Aaron-
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post #5 of 17 (permalink) Old 12-08-2012, 08:05 PM
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If you cant swing all 8, it's best to replace a bank.
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post #6 of 17 (permalink) Old 12-08-2012, 08:11 PM
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Quote:
Originally Posted by Hondarider552 View Post
If you cant swing all 8, it's best to replace a bank.
X2 at least do all 4 on one side that the bad injector is on


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post #7 of 17 (permalink) Old 12-09-2012, 07:01 AM
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Bosch Remans can be had for $200ea, for what it'll cost you in labor you should at least do that bank for another $600.
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post #8 of 17 (permalink) Old 12-09-2012, 07:13 AM
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Do the whole bank...
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post #9 of 17 (permalink) Old 12-09-2012, 07:36 AM
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So a full injector job would be 7 to 8k! Fire up those 7 cylinders & drive south....just keep driving south.
Seriously though you and a buddy could print a DIY & knock it out for 800 plus the return line seals. Spend that money on your family, it's Christmas!

cc/sb lb7, lowered, cut & delipped, lbz rods, keyed, balanced, ati, so cal flex, studded, +40 nozzles, going 360/480 from SDP
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post #10 of 17 (permalink) Old 12-09-2012, 07:57 AM
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Were it mine, and the injectors have been done about 80,000 miles ago, I would do just one. So long as I can be sure which injector it is, it is only going to cost $200 for the injector and a few bucks for gaskets and seals. Most of these gaskets are reusable and so you don't need to replace them anyhow. If you do buy the $200 gasket kit, you wouldn't have to buy it again for the next one. From everything i have read, you chances are about the same of a reman injector going bad as they are of a good injector doing the same. I'll take the gamble, but I do all my own work. If I was paying for labor I would have the whole bank done, it at least gets you some sort of warranty.

Walker,

2002 GMC Sierra 4x4 with a Duramax
250,000 miles
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