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Author Topic: Duramax LB7 Injectors  (Read 1040 times)

Offline BeWitty

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Duramax LB7 Injectors
« on: June 11, 2019, 09:02:06 PM »
I bought an 03 Duramax and it needs new injectors. Wondering if anyone here has done this repair themselves and if so, how difficult was it and how much time did it take?

Iím also interested in the best place to purchase the injectors (which injectors?) and installation kit? Cost is a factor. Has anyone used a local shop to have Duramax repairs that they would recommend that are fair and reasonably priced?

Iím not 100% sure Iíll be keeping this truck so I donít want to spend top dollar on this repair. Thanks for the help.

Online HntnFsh

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Re: Duramax LB7 Injectors
« Reply #1 on: June 12, 2019, 08:22:41 AM »
 On the 03s you have to pull the valve covers on both sides. Its pretty involved. Ive heard book time is 8 hrs. For a DIY a couple days wouldn't surprise me. Go over on the Duramax forum. Tons of good info.

Offline JJB11B

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Re: Duramax LB7 Injectors
« Reply #2 on: June 12, 2019, 08:35:48 AM »
people I work with just payed $4k+ to have their 03 Duramax injectors changed
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Offline trophyhunt

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Re: Duramax LB7 Injectors
« Reply #3 on: June 12, 2019, 08:38:24 AM »
How dare you post this on draw day!!    You realize nothing else matters today right????     





 :chuckle: kidding!!  I have an 06, wonder how much longer I have on my injectors?? I put a fuel additive in every few tanks.
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Offline BeWitty

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Re: Duramax LB7 Injectors
« Reply #4 on: June 12, 2019, 09:00:40 AM »
people I work with just payed $4k+ to have their 03 Duramax injectors changed

Where did they have it done? The research Iíve done shows that you can pay anywhere from $1500 (remanufactured)-3000 (new) for a set with installation kit. $1500 sounds about right for labor.

Also, considering just selling it AS IS so I donít have to hassle with it. Iím replacing some small things that have been neglected on it already.

Offline trophyhunt

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Re: Duramax LB7 Injectors
« Reply #5 on: June 12, 2019, 09:03:54 AM »
Coach on here is a heck of a mechanic, I had him replace my injector pump on my 06, did a great job and was reasonable. Not sure what his business's name is, he's just north of Seattle I think.  @coach. Or. #coach
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Offline JJB11B

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Re: Duramax LB7 Injectors
« Reply #6 on: June 12, 2019, 09:23:22 AM »
 
people I work with just payed $4k+ to have their 03 Duramax injectors changed

Where did they have it done? The research Iíve done shows that you can pay anywhere from $1500 (remanufactured)-3000 (new) for a set with installation kit. $1500 sounds about right for labor.

Also, considering just selling it AS IS so I donít have to hassle with it. Iím replacing some small things that have been neglected on it already.
they had it done in NE Oregon where they live, I think that was all they had done, but maybe there was something else they did while they were at it. $4k sounds steep, I did the injectors myself in my '99 Powerstroke but that was pretty easy. I think I got Reman. injectors for $400 each through a buddy. again way different pickup
"Pain heals, chicks dig scars, glory lasts forever."
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Online HntnFsh

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Re: Duramax LB7 Injectors
« Reply #7 on: June 12, 2019, 09:33:08 AM »
people I work with just payed $4k+ to have their 03 Duramax injectors changed

Where did they have it done? The research Iíve done shows that you can pay anywhere from $1500 (remanufactured)-3000 (new) for a set with installation kit. $1500 sounds about right for labor.

Also, considering just selling it AS IS so I donít have to hassle with it. Iím replacing some small things that have been neglected on it already.

From what Ive read the recommendation was to stay away from rebuilt.

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Re: Duramax LB7 Injectors
« Reply #8 on: June 12, 2019, 09:36:10 AM »
How dare you post this on draw day!!    You realize nothing else matters today right????     





 :chuckle: kidding!!  I have an 06, wonder how much longer I have on my injectors?? I put a fuel additive in every few tanks.

The 06 LBZ is cheaper and easier. You can replace whichever injectors are bad. They are on the outside and way easier to get to. The earlier model Duramax engines they recommend replacing them all at once because they are so labor intensive to get to. My LBZ is still running strong on original injectors with 225,000 miles on them.

Offline CamoDup

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Re: Duramax LB7 Injectors
« Reply #9 on: June 12, 2019, 09:39:41 AM »
Have you tried cleaning them yet?



I did this on my 06 lbz and noticed a difference. They dont make the AcDelco stuff anymore but I found it on ebay. The lb7s are known for bad injectors. I think when they first came out they had a recall for them. Good luck

Offline Tikka300wsm

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Re: Duramax LB7 Injectors
« Reply #10 on: June 12, 2019, 09:54:56 AM »
Check out Lincoln Diesel for good prices on Bosch injectors. Thats where I bought mine for my lb7.

Offline huntnphool

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Re: Duramax LB7 Injectors
« Reply #11 on: June 12, 2019, 10:07:34 AM »
I did mine on my 7.3 Powerstroke, these guys were great to deal with. https://www.thoroughbreddiesel.com/2003-chevy-silverado-2500/ipmm190986435502t/?HideOptionsEditButton=True

 They have many different injector options too, I just posted up their 24 month warranty OEM.
The things that come to those who wait, may be the things left by those who got there first!

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Re: Duramax LB7 Injectors
« Reply #12 on: June 12, 2019, 10:50:43 AM »
I did mine myself many years ago. It was a big job but I just took my time. If you are going to do it yourself I would strongly suggest Lincoln Diesel. Then you can call them with questions if you run in to any snags. I did and it was a great help. I took my time and finished it in about a week. Truck ran great afterwords and no more white smoke at idle.
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Offline wadu1

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Re: Duramax LB7 Injectors
« Reply #13 on: June 12, 2019, 11:07:53 AM »
Coach on here is a heck of a mechanic, I had him replace my injector pump on my 06, did a great job and was reasonable. Not sure what his business's name is, he's just north of Seattle I think.  @coach. Or. #coach
As trophyhut said Coach (Cory) is very good and reasonable. His company is called Automotive Inc, they are in Kenmore 206-522-6100. He even delayed a hunting trip to get my daughters Blazer on the road before heading out.
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Offline TriggerMike

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Re: Duramax LB7 Injectors
« Reply #14 on: June 12, 2019, 11:40:32 AM »
'01 Duramax here  :hello:

I ordered mine from https://www.injectorsdirect.com/ as it was the best deal and my buddy replaced them for me. You'll also need to get the little cups they sit in as well as all the gaskets and high pressure lines. IIRC it was close to 4 grand for everything. Are you positive they need to be replaced?

Offline BeWitty

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Re: Duramax LB7 Injectors
« Reply #15 on: June 12, 2019, 11:54:10 AM »
Yeah they need to be replaced. JET chevy ran a diagnostic on them a few months ago for the guy I bought it from and they said the #8 injector was bad and since then the white smoke has gotten worse so Iím assuming another has cracked as well.

It sounds like injectorsdirect arenít a bad source  as long as you buy the Remanufactured and NOT the refurbished. And agreed, for a job this involved you replace them all at once.

I was told the injectors were originally replaced at 90k miles and now the truck has 190k so it seems about time to do it again. Thanks for the responses.

Offline BeWitty

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Re: Duramax LB7 Injectors
« Reply #16 on: June 18, 2019, 07:54:50 PM »
I have decided to sell it without doing the repair. I realize Iíll get significantly less because It wonít pass emissions as is and needs to do that in order to get current registration. Itís an 03 with 196k 4x4 crew cab. Very clean inside and out, spray in bed liner with matching canopy. Leather and Bose speakers.

Whatís is worth as is? $9-$10k? I see others 03s with similar miles go for $15/$16k.

Offline Whitpirate

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Re: Duramax LB7 Injectors
« Reply #17 on: June 18, 2019, 09:53:00 PM »
Coach on here is a heck of a mechanic, I had him replace my injector pump on my 06, did a great job and was reasonable. Not sure what his business's name is, he's just north of Seattle I think.  @coach. Or. #coach

Automotive Inc, Kenmore, WA
Coach-- Corey Wisner. 206-522-6100

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