Ah, memories. Did my 03, CA LB7 (w/EGR) last summer...over many more days than I care to admit 😀. Had to smile when your guy lifted off the upper valve cover. As you know, many folks struggle mightily at that point and I found a large block of wood and a 5# hammer popped both sides off easily (strike down from the valley side). I also appreciate your insight on not trusting balance rates alone as a diagnostic tool. That Tech 2 check of injector on time told the whole story. Looks like you did a lot of work to isolate return lines from each bank for a return flow test. A trick I learned is to break into the main return line just ahead of the tank and check there. You will obviously not get bank-by-bank but the total should tell you what you need to know. I doubt you would ever recommend injector R&R on ones bank anyway. Another important point is in regard to those pesky, shallow head hex fasteners under the covers. Mine all came out fairly easily (also the many other hex on this job) because I was careful to deeply seat my tool into each upon removal. I bought new, deeper hex for under the VC's. On valve adjustment, think I may have gone a bit tighter than you did (10 thou?) which quieted the engine dramatically. I was amazed that clearances were all over the map (high). I snugged up the serp tensioner with a blocked breaker bar and used the alternator nut to turn the engine. As I rookie, I bagged and tagged all my bits and wrote a step-by-step log of everything I did, then went through in reverse when putting things back. Only a few leftover items (which didn't look too important 😀) and the beast fired on the third series of cranks and has been excellent for 2500 miles with no leaks. So, on that injector job I'm guessing what, 4-6 large? Best.
I've got two questions. What did you put on the copper crush washers to keep them in place right before installing them? Second is could you give the specifics of installing the cups? what type of Loktite and where the loktite goes thank you for any input you could give,
Blu Morgan not sure if you still need the advice but nothing needs to to be put on the copper washers. Just put them inside the cup after you install the cup. You will need red loktite 272. The end and shoulder of the cup that goes into the head needs the loktite.
So i can just buy them and replace them and check balance rates and im good to go. No programing needed Thank you for replying so fast much appreciated @Dmaxstore
If you get 60 overs your truck will need to be tuned accordingly but you won't have to program flow rates or anything into the ecm like the newer trucks. But your custom tuning will need to be modified
What if you ignore the haze, and it starts knocking and smoking really bad. I didn't know my injectors were bad. Is the knock possibly a washed out cylinder that now has a loose piston ?
I was getting antifreeze in my oil and everyone said it was a blown head gasket, I got the heads off today finally and there’s no sign of them leaking anywhere, where else might my problem be? Please please, any advice in appreciated.
Dmax Store , thanks sir, the heads are at the shop right now being pressure tested and milled. It was also antifreeze in my oil, not the other way around, do you still think that might not be the culprit? Guess I’ll check the oil cooler next then, thanks, both shops I talked too after my problem was discovered said it was definitely the head gasket and it would run around $6,000, I’m 10000% sure they’d have charged me that, even if it wasn’t the problem.
I ordered a head gasket and fuel injector kit (I didn’t order them from you, i didn’t know. I think it was Lincoln)and it came with five little tubes of loctite, im not sure what it’s for, I’ve got my heads back on and installed the injectors today, are you supposed to put loctite on the banjo washers on the fuel return lines that screw on the injectors (LB7). Thanks for any advice.
Hey Shane, the only place we use the loctite is the injector cups but I think you are already past that point, Please give us a call if you have any other questions. Thanks! 877-469-3629
Travis Edwards thanks a million Travis, I was wondering about those banjo washers and if I messed up by not using loctite. You just gave me some piece of mind.
Hey that intake heater controller module near the fire wall on the gmc I'm trying to figure out where the ground white goes too i hooked all three wires right but I out have a black wire left which is the 4th black wire I forgot where it bolts too it's an 2003 gmc 6.6 diesel 2500 I did the injectors
My high pressure fuel injector line failed and is leaking. Im going to replace it. My question is.... what is the torque on these lines or are they just snug tight? Also, do I have to bleed they system after replacing the line? If so, how is that done?
JOHN EBBS you need to put red loktite 272 on the end and shoulder of the cup, push it back in then put the copper ring inside the cup and next put the injector inside. If you do this I recommend to get SoCal diesels billet hold down clamps, the factory ones flew under high boost and the bolts stretch. SoCals keeps the cup and injector from moving, so you wont have any coolant blow by also comes with ARP studs instead that get torqued to 55lbs.
Wow i was very impressed with the information provided and the quality of this video. Explained many things with great detail and it wasn't 2 whole minutes of umm and uhh. He had it down all the way through straight to the point.
That upper valve cover sure came off easy 😀. Instead of prying, I used a block of wood and a mallet to pop mine loose. Only one cup came out and I cleaned everything and reinstalled. Also, is Bosch even making “new” injectors. I contend all LB7 injectors are remans of the improved (better bodies and return seats) units. And hey, it says right on the FICM “don’t power wash”. Otherwise, excellent video 👍👍👍.
I’ll tell you what you guys look like real professional your shop is clean your fluid in your video too bad you’re not closer to me in my town I got LB7
Thank you Kyle! We take pride in our shop and strive to bring the best information and service to Duramax Owners. If you ever have any questions about your LB7 feel free to reach out to us and we would be happy to give you advice and/or recommendations
We recommend the brand new injectors and have had the best success with those. That being said, we do have good success with the remanufactured injectors from Bosch, not quite as good as the brand news but still very low warranty rate.
My truck is hazing pretty bad now only thing I can see is balance rates and I only have one out of spec at -5.9 the rest are under 2 . It starting to smoke bad can I get away with replacing that one since it’s in the easy side of the passenger side or what sir 😊
I have a 2001 lb7 101000 miles no smoke no miss starts easy cold n hot runs like new. But I'm getting crank case filled with fuel. Is that injector body cracked?
I have the same thing. Been told cracked injector bodies, bad seals on the injectors, or it is the return lines leaking. Either way I'm getting new sticks and all gaskets/orings along with any lines that may be bad.
@@ivanbaires5727, you're lucky it's not an engine "thing" with that kind of fuel in the oil. Like my old lady says, "Pull that damn dipstick out once in a while".
For one there's nothing wrong with pressure washing an engine long as you're not stupid and don't hang out at the harness connections too long and two what does let alone a diesel have to do with it.....I'm curious where you're coming from here cuz if anything you're better off pressure washing a diesel cuz they don't have coils and spark plug wires and cap and rotors to deal with not getting wet.....
I have an LB7 that smokes at idle and my Balancing rate are averaging out to -2.62 but only my number 5 cylinder is reading +15 could this be an injector harness I have replaced all injectors but the #5 is the only one that has not changed has stayed the same??
A +15 balance rate is the maximum that the truck will read, there is likely another issue with the motor as the injector is trying to balance out the engine. It is rare to see a failed injector with a +/- 15 balance rate.
LB7 Life baby!! You guys are the best.
Great video guys. You should do more of these .
Thank you for the LB7 content! I'm gearing up to do the injectors on mine this Spring 😀🤘
What can I expect to pay a reputable shop to do this?
Ah, memories.
Did my 03, CA LB7 (w/EGR) last summer...over many more days than I care to admit 😀. Had to smile when your guy lifted off the upper valve cover. As you know, many folks struggle mightily at that point and I found a large block of wood and a 5# hammer popped both sides off easily (strike down from the valley side).
I also appreciate your insight on not trusting balance rates alone as a diagnostic tool. That Tech 2 check of injector on time told the whole story.
Looks like you did a lot of work to isolate return lines from each bank for a return flow test. A trick I learned is to break into the main return line just ahead of the tank and check there. You will obviously not get bank-by-bank but the total should tell you what you need to know. I doubt you would ever recommend injector R&R on ones bank anyway.
Another important point is in regard to those pesky, shallow head hex fasteners under the covers. Mine all came out fairly easily (also the many other hex on this job) because I was careful to deeply seat my tool into each upon removal. I bought new, deeper hex for under the VC's.
On valve adjustment, think I may have gone a bit tighter than you did (10 thou?) which quieted the engine dramatically. I was amazed that clearances were all over the map (high). I snugged up the serp tensioner with a blocked breaker bar and used the alternator nut to turn the engine.
As I rookie, I bagged and tagged all my bits and wrote a step-by-step log of everything I did, then went through in reverse when putting things back. Only a few leftover items (which didn't look too important 😀) and the beast fired on the third series of cranks and has been excellent for 2500 miles with no leaks.
So, on that injector job I'm guessing what, 4-6 large?
Best.
Very clear information professionally done.
Thank you, glad it was helpful!
I've got two questions. What did you put on the copper crush washers to keep them in place right before installing them? Second is could you give the specifics of installing the cups? what type of Loktite and where the loktite goes thank you for any input you could give,
Blu Morgan not sure if you still need the advice but nothing needs to to be put on the copper washers. Just put them inside the cup after you install the cup. You will need red loktite 272. The end and shoulder of the cup that goes into the head needs the loktite.
My 03 is smoking, however my command rates are high. Stay Around .50 could this still be injectors?
Why was his coolant tank so dirty....leak in head gasket or egr cooler????
Where is the lb7 injector trim codes located on injector please help
LB7 injectors do not have trim codes. That is only 2006 LBZ and newer.
So i can just buy them and replace them and check balance rates and im good to go. No programing needed
Thank you for replying so fast much appreciated @Dmaxstore
@@Dmaxstorealso for example if I get 60 over no programing needed either just plug play and check rates?
If you get 60 overs your truck will need to be tuned accordingly but you won't have to program flow rates or anything into the ecm like the newer trucks. But your custom tuning will need to be modified
Ok thank you for info @@Dmaxstore
What if you ignore the haze, and it starts knocking and smoking really bad. I didn't know my injectors were bad. Is the knock possibly a washed out cylinder that now has a loose piston ?
There are a lot of variables from your description, if you know your balance rates and on times we can help you out over the phone. 877-469-3629
Compression test cylinder
I was getting antifreeze in my oil and everyone said it was a blown head gasket, I got the heads off today finally and there’s no sign of them leaking anywhere, where else might my problem be? Please please, any advice in appreciated.
Dmax Store , thanks sir, the heads are at the shop right now being pressure tested and milled. It was also antifreeze in my oil, not the other way around, do you still think that might not be the culprit? Guess I’ll check the oil cooler next then, thanks, both shops I talked too after my problem was discovered said it was definitely the head gasket and it would run around $6,000, I’m 10000% sure they’d have charged me that, even if it wasn’t the problem.
I ordered a head gasket and fuel injector kit (I didn’t order them from you, i didn’t know. I think it was Lincoln)and it came with five little tubes of loctite, im not sure what it’s for, I’ve got my heads back on and installed the injectors today, are you supposed to put loctite on the banjo washers on the fuel return lines that screw on the injectors (LB7). Thanks for any advice.
Hey Shane, the only place we use the loctite is the injector cups but I think you are already past that point, Please give us a call if you have any other questions. Thanks! 877-469-3629
Travis Edwards thanks a million Travis, I was wondering about those banjo washers and if I messed up by not using loctite. You just gave me some piece of mind.
Hey that intake heater controller module near the fire wall on the gmc I'm trying to figure out where the ground white goes too i hooked all three wires right but I out have a black wire left which is the 4th black wire I forgot where it bolts too it's an 2003 gmc 6.6 diesel 2500 I did the injectors
Where are you guys located?
diamond springs California it looks like. I went to their website and that is what it said at the bottom of the site
My high pressure fuel injector line failed and is leaking. Im going to replace it. My question is.... what is the torque on these lines or are they just snug tight? Also, do I have to bleed they system after replacing the line? If so, how is that done?
Helo guys I have a 04 kodiak whit the lb7 I have no fuel on the return line and no fuel in fuel rail
Injection pump
You didn't even show how to install the cups!
acdelco or bosch?
Genuine Bosch
hello, Could you help me with a P02146 code that goes in the limp mode.
we apreciate any help, thank you.
We can help you out, give us a call at 877-469-3629 and let us know what year truck you have to get started
Pressure washing the engine bay, of a diesel work truck. Is this roadkill? Facepalm
You never explained how the injector cups are installed.
JOHN EBBS you need to put red loktite 272 on the end and shoulder of the cup, push it back in then put the copper ring inside the cup and next put the injector inside. If you do this I recommend to get SoCal diesels billet hold down clamps, the factory ones flew under high boost and the bolts stretch. SoCals keeps the cup and injector from moving, so you wont have any coolant blow by also comes with ARP studs instead that get torqued to 55lbs.
Flex*
When you have a truck like this,in mexico you throw nothing in the garbage.
So whats the cost of labor
If you have to ask, you can't afford it. / Confucius
Wow i was very impressed with the information provided and the quality of this video. Explained many things with great detail and it wasn't 2 whole minutes of umm and uhh. He had it down all the way through straight to the point.
That upper valve cover sure came off easy 😀. Instead of prying, I used a block of wood and a mallet to pop mine loose. Only one cup came out and I cleaned everything and reinstalled. Also, is Bosch even making “new” injectors. I contend all LB7 injectors are remans of the improved (better bodies and return seats) units. And hey, it says right on the FICM “don’t power wash”. Otherwise, excellent video 👍👍👍.
I’ll tell you what you guys look like real professional your shop is clean your fluid in your video too bad you’re not closer to me in my town I got LB7
Thank you Kyle! We take pride in our shop and strive to bring the best information and service to Duramax Owners. If you ever have any questions about your LB7 feel free to reach out to us and we would be happy to give you advice and/or recommendations
Do they make SAC 45 over microphones?
All I hear online is how horrible reman are. Do you guys sell a lot of reman? If so any issues?
We recommend the brand new injectors and have had the best success with those. That being said, we do have good success with the remanufactured injectors from Bosch, not quite as good as the brand news but still very low warranty rate.
My truck is hazing pretty bad now only thing I can see is balance rates and I only have one out of spec at -5.9 the rest are under 2 . It starting to smoke bad can I get away with replacing that one since it’s in the easy side of the passenger side or what sir 😊
We recommend replacing at least one bank (4) at a time. If one is bad the rest are likely not far behind
@@Dmaxstore ok anything I can do to try to fix that one -5.9 balance rate
Damn great video..I am sick 17k.2 years miles truck starting to smoke and the shop ..will not call me back
I have a 2001 lb7 101000 miles no smoke no miss starts easy cold n hot runs like new. But I'm getting crank case filled with fuel. Is that injector body cracked?
I have the same thing. Been told cracked injector bodies, bad seals on the injectors, or it is the return lines leaking. Either way I'm getting new sticks and all gaskets/orings along with any lines that may be bad.
I just got an 02 lb7 changed the oil today and it had over 4.5 gallons im scared its an injector thing
ivan baires it is. It’s either return line leaks or injectors
@@ivanbaires5727, you're lucky it's not an engine "thing" with that kind of fuel in the oil. Like my old lady says, "Pull that damn dipstick out once in a while".
@@tommyimalas2283 i changed my oil again more came out then what i put in sent a sample in for testing
Pressure washing a engine, let alone a diesel?? Oh no no no ya just lost me
Tommy Halcomb why shouldn’t you pressure wash an engine??
Yeah why shouldn’t he?
For one there's nothing wrong with pressure washing an engine long as you're not stupid and don't hang out at the harness connections too long and two what does let alone a diesel have to do with it.....I'm curious where you're coming from here cuz if anything you're better off pressure washing a diesel cuz they don't have coils and spark plug wires and cap and rotors to deal with not getting wet.....
Hello what happens if I connect an injector the wrong way?
Thank you so much!!!!!!
Awesome videos guys, thankfully I bought the warranty for injectors!
I have an LB7 that smokes at idle and my Balancing rate are averaging out to -2.62 but only my number 5 cylinder is reading +15 could this be an injector harness I have replaced all injectors but the #5 is the only one that has not changed has stayed the same??
A +15 balance rate is the maximum that the truck will read, there is likely another issue with the motor as the injector is trying to balance out the engine. It is rare to see a failed injector with a +/- 15 balance rate.
Injector connector terminal spread open and not making contact. Check injector connector terminal