LLY #7 Injector replacement.

[@bradlav11]

Looking at duramax trucks to buy and this just sold me on an lly vs an lbz... great choice of music btw

[@thomasmolitor960]

LLy also has the largest turbo put on a duramax.

[@Nordic_Mechanic]

and better, mahle pistons

[@crwdavis]

Thanks for the video, getting ready to do #8. Good thing I watched it because I was ready to pull valve covers I didn't realize they switched to the external on the LLY.

[@tylershuff3283]

If you woulda pulled your vc and not noticed it

[@thomasbailey8306]

Thank You for the Video. My 05 just took a Shit. And I had Chevy dealer put it on Computer and They said I have 2 bad injectors. No2 and Im not sure of the other. They want 2400.00 dollars to put those 2 in. And naturally my warranty I bought for truck doesnt cover it. So Im going too do it. Thank you again

[@timt2tinsley]

Given the thorough nature of the ECM, I find it curious there were no codes directing you to #2 and #7 cylinders, and I find it even more curious it's the same two problem cylinders I read about all the time. ( including the chaffing/grounding at the alternator bracket.) The 3 local Stealerships near me were absolutely useless. I then searched out 3 independent "Diesel Only" shops only to hear "I don't know.....you shoulda bought a....." Thank goodness for guys like you taking the time to share your experiences on here, that's how I repaired mine ! Thank you for a good video.

[@tylershuff3283]

I've got codes for mine.. hell when it did it to me I shut cylinder 7 off with the scanner tool and just kept going

[@sheen127]

I got the main thing down on how to remove it. Just dreading the ones that are behind the steering shaft and the other one behind the wiring harness and the other dreaded one behind the intake up against the fire wall.

[@thomasmolitor960]

The fuel return lines are the hardest part to do. Making sure you do not lose the retainer clip or break the head of the plastic nipple. Before doing the job i would recommend getting a return line kit online. The dealer is $60 per side vs $15 online.

[@Mebob2001]

in all honesty man theres a snap on socket that costs 35 bucks that is designed for 19m injector line nuts, its WELL work the investment, it will lower the repair time hugely, ive got both tool's and i only had to remove the line off the rail and the holdown on the injector, pushed wiring out of the way and pulled #7 out, i had to do #2 all ready so i was trying to do it quickly, but awsome video!

[@kimsellers5833]

Turn off the RADIO!!!!!! So I can hear the video!!!!!🤬

[@albertbujanda7231]

Neat little tutorial. Thanks Thomas for taking the time to document and share. oh, and the music is great too! :-]

[@tylershuff3283]

I brand new one is not 700 unless it's 350%

[@thomasmolitor960]

If you are buying reman injectors yes $350. If buying new, expect around $700 for stock.

[@tylershuff3283]

@@thomasmolitor960 ummm no go to Lincoln diesel lol they sell oem NEW Bosch for way less then that but also I've been quoted 1200 for just one as well

[@thomasmolitor960]

Glad i could Help Martin. Currently doing another video on doing the number 6 Injector. Will be up soon, but ran into some issues. If you break the fuel return line expect to be sitting for a few days as no where carries the part in stock. If you do need one its $57.99 at auto stores. Auto zone, Napa, Orielly's carry it but Advanced does not.

[@Nordic_Mechanic]

Gm has the return lines IN STOCK at 285 $ per side lol. Told them to keep them. I bought the dipaco set. A little cheap, but at 17$ a side, I bought 3 sets and you can individually change the ones you break

[@zx6tr82]

I ordered my return lines at xtream diesel performance for 17.99 per side

[@joshshank3449]

Great video showed the way to do it at home without seeing all the people pulling the cabs for this nice video.

[@redin575]

Good instructional video. You should get paid by Kobalt for your advertising.

[@thomasmolitor960]

That's would be nice, but I work for s living.

[@StyleGT]

im still fighting deciding between an LBZ or LLY....... im not a super tuner i just want a truck that has a bed, good MPG, and reliablity............ im aware of getting an EGR block and exhaust and edge insight to get it runs very smooth... the only thing i haul is 2 motocross.. should i go LLY since their cheaper a bit?

[@thomasmolitor960]

LLY are not cheaper. They cost more, lb7 are cheaper due to the internal injectors. But are sought after because they are pre emissions. And if you are up to the challange and willing to throw money around lb7 is a good truck. Lly and lbz are going to be more dependable.

[@StyleGT]

Thomas Molitor thanks for the quick awnser! i said LBZ or LLY i really dont want an lb7 they look so trashed around from alot of owners and miles its crazy..... LLY are in more in my price point of a truck that haul 2 motocross...... i just want a bulletproof trucks that can be drive everyday... just sold my k1500 97 305 had it for a couple of years never ever did anything except oil changes and air filter... i need something like this ... do you think the LLY is worth the bet of my money?

[@StyleGT]

StyleGT the 305 was an heavy duty package with 6 lugs wheels and heavier chassis.. always believed for me it was better to get a 3/4.... and friends get decent MPG with their cummins and lb7 so im thinking of getting an LLY....

[@thomasmolitor960]

Sorry, was late when I read it and thought I'd seen lb7. But LLY is literally the same engine as the lbz. Difference is the lbz has a more aggressive factory tune, and a re designed turbo inlet pipe, they also did some slight re design for better engine air flow to keep it from over heating. So might as well go with the LLY, and I get 19.2 mpg in my truck.

[@StyleGT]

Thanks alot, better bottom and piston on LBZ right? I dont even have the truck yet, but the headgasket thing is scares me to death. truck has 180,000 kilometers.... i heard that you can check the upper radiator hose if its rock solid it mean headgasket bad right? Make the truck runs and check in coolant if there is bubbles... and on the dipstick for rare coolant leaks right? Thanks alot thomas i truly apreciate your help, its my first diesel truck... i would have like an LBZ but not much work thoses days so i guess ill make an LLY bullet proof (: first thing is Coolant change, LBZ mouthpiece, pcv reroute, mbrp exhaust, efi live v2 and edge insight cts all in that order ( i need some speakers and alpine setup too but meh thats the least of my worries )

[@KSA-uu8js]

turn the country pop off

[@thomasmolitor960]

Make your own video.

[@fossilknife]

did you make sure it wasnt the injector harness #1 and #7 are common to go because of the angle of the harness they make an upgrade kit for them.

[@thomasmolitor960]

To Rangerdangr, The injector showed signs of going out in a few ways. First was upon warm up the engine would rough idle, This can be several things besides injector. But While accelerating the engine would want to stall, along with alot of white smoke would billow out of the engine accompanied by a loud squeaking noise from the engine. If you are having injector concerns take it to a mechanic and have them do a balance rate tests on the injectors. Should be $50-$90 depending on place. They can tell you which injector is bad and which is still good.

[@Strunz0]

Also something to note, was that my stuck injector didn't throw a dash code but there is a code in there for the #4 injector when scanned. Having the Edge Insight monitor is definitely something I would recommend for everyone to have

[@douggardipee1292]

Rob Galles

[@Mebob2001]

hey man, this being an LLY have you changed out the inlet to the turbo? compare to whats on the truck to an LMM one you will see the huge change! and its a really really good idea!

[@thomasmolitor960]

I am aware of the turbo inlet change. Have been trying to find one off a lbz that isn't $200. Currently in the process of installing a race fuel plug. But removing the cab to do so. Will more thank likely make a video of how to do that.

[@Mebob2001]

ye i got the heads off an LLY right now pulled em off last night, good old blown head gaskets.. well really firing ring failure

[@ismellcastor]

Thomas Molitor The best price I found for the LBZ turbo inlet was Danville Performance...$99. I ordered mine from them and had it within 24 hours. www.danvilleperformance.com/lbz-mouthpiece/

[@thomasmolitor960]

ismellcastor Thanks for the link.

[@GrowingUpGarden]

When one injector starts to go bad will the truck strand you or will it make it home

[@joejames4264]

My number 5 just went bad. It didn't leave me stranded. Just ran like crap from a stop and smoked bad.

[@GrowingUpGarden]

I have been looking in to getting a c4500. how many miles were on the injector before it went bad

[@robertcampbell8313]

Why can't a person find the removal and replacement for LBZ 2007 duramax

[@MrRati4]

Awesome video, that helps out a lot! Is #5 injector just as easy to replace?

[@thomasmolitor960]

With the #5 Injector you need to remove the fuel filter and housing to get it out. But essentially the same. Injectors on the drivers side are a bit harder because of the disconnecting of wire harnesses ECT.

[@MrRati4]

Im not a happy camper right now. A local diesel mechanic told me #5 and #7 injectors were bad. After watchin your video I told myself I could do that, so I did. Turned it on, and my truck is still doing the samething. I'm thinkin he told the wrong injectors were bad. That S.O.B. any suggestions?

[@thomasmolitor960]

I dont know what your symptoms where before you changed your injectors. Did you buy brand new injectors or re-manufactured? Did you torque down the injector to the right spec? I actually had to do mine twice, The first injector i bought was faulty and had to be replaced with a seconded one. No extra cost just exchanged.

[@MrRati4]

It wouldn't go over 25mph and would have more white smoke than cheech and chung. It would spit and sputter.thats when I took it to the mechanic. I didn't torque them, you think that might be the cause? Do you know What the torque spec is?

[@thomasmolitor960]

rj freeman Fuel injector bracket bolt should be at 22ft lbs. And it definitely seems as though you had a bad injector.

[@hddm3]

sure it didn't need the upgrade to the wiring? just wondered. thanks

[@thomasmolitor960]

If it was the FICM then replacing the injector wouldn't have solved the issue. If you are having a FICM issue there is a "ice pic" method to fix that.

[@nickc2708]

No. Cleaning of the bore ?

[@thomasmolitor960]

I clean them out before I install the new injectors. Which is good practice. a Shot gun cleaning kit with the 12g brass brush works well.

[@martinlevi8612]

thanks my friend now i have an idea how to remove the fuel injector tomorrow, thanks for your video GOD BLESS

[@zackk695]

I see you did not have to remove the valve covers as another video on an 02' showed the covers having to be removed.I have an 05' and it would be nice if no covers had to be removed.How long would you say it would take to replace all injectors on a 05' LLY motor. thanks for the video and all your help! These videos make a difference

[@thomasmolitor960]

That is correct, the LLY motor does not need the valve covers removed. If you are going to change all injectors at one time. It will take the better part of a day. Assuming you have all parts tools and nothing breaks. Injectors 1,2&3 are the most difficult to remove.

[@zackk695]

Thomas Molitor Thanks so much Mr Tom

[@Rangerdnger]

How did you know the injector was bad? What were the symptoms?

[@GrowingUpGarden]

How often do you have to replace injectors?

[@thomasmolitor960]

100k to 150k.

[@nickc2708]

The crush washer can't fall through the nozzle hole

[@thomasmolitor960]

Obviously it will not fit through the injector nozzle hole. But it will fall back down into the injector cup.

[@sdwarrenwarren]

Thanks for the video brother! I plan on tackling #7 soon and #2 is reading high too. Great job 👍. Thanks again! Is there any calibration needs done on em or just get the new ones in and go?

[@timt2tinsley]

1 - What codes was it throwing ? 2 - How do you know it wasn't a weak connection at the harness at #2 and #7 ? 3 - Did you inspect the large wire loom coming off the FICM, where it crosses the bracket ? It's the first place to look for bare wires, and a good place for everyone to do some preventive work..... NOTE - the dealer wants $300 for a kit. A guy on Ebay sells the same kit for $180. Another guy on Ebay sells just the connector, (no kit) with an 8" pigtail, that will work on any injector connecter...$22 inc s/h

[@thomasmolitor960]

1. It was not throwing any codes or signaling the check engine light. 2. I had had taken the truck to my local GM dealer where they were able to do a Balance rate test. Upon increase and decrease of power on each injector They were able to create and fix the symptoms with the faulty injectors. ( you can do these tests yourself if you would like to spend 600+ for the scanner and program.) 3. I did a physical inspection of the connections and wires leading from the FICM to the Injectors. It is always a good idea to inspect the wire harness and connections before diagnosing faulty injector. The most common place for wire grounding is where the wires come across the Alternator bracket.

[@codystrong8016]

Hey Tomas, Just watched you video and it was great. I have a 07 classic with the lbz and have a ticking issue right now. it still has great power, starts with ease, and has 0 smoke or haze. To me it sounds like it is a rocker arm issue, but I am no diesel mechanic. Or maybe some kind of exhaust leak. (seems loudest on driver side near the rear of engine and the top of the head,and under boost) . any thoughts? And is changing an injector on the lbz about the same as what you did in this video? Thanks in advance.

[@thomasmolitor960]

Ticking could be almost anything. Injectors to lifters to the manifolds to Pistons to the injector hold down bracket not tight or warped. I would have it diagnosed before throwing money at it. And the LBZ motor and the LLY are one in the same. Some differences but none that are going to effect replacing the injector.

[@tduguid1961]

Serious dude.... You could not make an instructional video without playing music over your instruction. Good God.

[@deanomatic5129]

Why didn't you replace the head gasket on the other motor? I've been told that after you do the new gasket and studs those are bullet proof.

[@thomasmolitor960]

You are probably referring to the upgraded ARP stud kit. Which I would have done if I indeed had to do it. But the dealer I purchased the vehicle from had written me a IOU to fix low coolant light issue. Which turned out to be the head gasket. They decided to swap the motor. I am now 60k into the "new" motor and all is well.

[@stealthcon6975]

where did u get urs

[@thomasmolitor960]

Local Place close to me called Badger Diesel

[@mangravy2000]

Hold the music on instructional videos. Great vid otherwise.

[@randycollison635]

kinda needed to see if its hard to go back in to the motor

[@AZdirtdog]

I just replaced my plug, very common #2--#7 my buddy had the same problem so I was ready

[@Strunz0]

Are you absolutely sure it wasn't just a bad injector harness? You mentioned #2 and #7 which are prone to having the harnesses lose connection. It will shut down that bank of cylinders and run rough or shut off. I appreciate the video because my #4 injector just went out and is showing that it's stuck wide open. Balance rates are +15 on that injector so I'm going to replace it. Hopefully going to test the return tomorrow just to be sure

[@ricardorodriguez-se7tp]

I thought you had to replace the hard fuel line

[@thomasmolitor960]

You do not have to replace them. If you can not get it to seat properly then you will have to.

[@jacktora2460]

enough with the music..totally ruined your video

[@thomasmolitor960]

Sorry I don't work on my truck in silence.

[@yeetyeetskeetskeet5132]

you should of done all 8.

[@thomasmolitor960]

I did end up doing all 8.

[@bouchee2007]

i love people who say, "should have done all 8" can i borrow a few grand?

[@nickc2708]

bouchee2007 I'd you can't afford maintenance on a diesel don't own one. If you need all 8. You GET all 8

[@bouchee2007]

boost lord by your logic, if you can't afford to drop a transmission in a car, down own one. Or the other high priced one. If you can't afford a headgasket, don't own any automobile. Good try though

[@nickc2708]

bouchee2007 you make zero sense..

[@eftupworld]

thanks!

[@limitlessmentality5741]

please do one for number 5 thats what i need to fix on mine lol

[@thomasmolitor960]

I have a video up already of 5-1

[@thomasmolitor960]

kzbin.info/www/bejne/gaSYpn2Fn76sf5o

[@limitlessmentality5741]

+Thomas Molitor thanks man i going to do the work myself im not a mechanic hopefully i do it alright..... thanks

[@thomasmolitor960]

+aggressive bello if you have any questions message me. I know it can be frustrating if you break a part or something.

[@limitlessmentality5741]

+Thomas Molitor i will sir thanks

[@robertcampbell8313]

Do you have to drain the coolant. Next time you make a video turn down the music so you can be heard

[@JoHuGi]

Thumbs up for the background music.