Silverado Duramax Injector Cleaning 

As you have no doubt come to realize, inferior VCO injectors on our LB7’s are prone to not shutting off properly, causing leakage and coking of the nozzle tips 😟. Look into SAC’s which are available in OEM delivery rates. That type was used with much better reliability on all Duramax after LB7.

can you post a link to this stuff, or a part#. I've heard about people mistakenly running something designed for gasoline engines..

Damn that sucks!

I didn't replace fuel filter and didn't have any issue. I suppose it wouldn't be a bad idea, especially considering they aren't terribly expensive.

Bryan, I cant honestly say. All injectors a few months prior were within specs. I did notice however after the clean out, the idle was smoother. I did not check the balance rates after as I didnt have my buddies checker.

That I am not sure of

No.

Absolutely it did. It also smoothed out the idle.

Na most of the ac delco shit I beleive I’d diesel with extreme additives, it burns like idling diesel

If you have an injector leaking....or hung open, it would be dumping more diesel into the combustion chamber and I believe you would get excessive black smoke.

The BMW diesel injector cleaner is reported to be a very close replacement. Amazon link: CLEANER www.amazon.com/dp/B00TMV4A2W/ref=cm_sw_r_cp_api_glt_fabc_J1MDHS2VYDVHV2D434SH

Jacob, I would just turn the key to the run position. It should activate the fuel pump....I think

J. James Sr. Diesel fuel rated lines. That is what these are

Using rubber lines temporarily would be ok as long as they are heavy enough and rated for auto use, my 1/2 inch line was rated for fuel and my 3/8 was a coolant hose.

MTroughneck83 nope. I didn't anyway. Wasn't a need

No, different product altogether. The AC Delco stuff is a concentrated bottle of cleaner. You can buy on Amazon. I ran Diesel Kleen at times, however I preferred something a little more powerful and lubricating. Stanadyne Lubricity was one a few others.

Nope. Once disconnected from the rail, there is no suction or anything on the lines to draw fuel. I also do not have a lift pump mounted anywhere between the tank and the fuel rail either.

@@paulthewxguru5899 ok. Yea I found some of the cleaner but not paying what they want for it.

Spraying where it connects to the rail or have you got a fuel line spraying at the fuel filter housing? If it is spraying at connection to the rail, it isn't clipped on properly or the crimped fitting is damaged.

Do you have a lift pump? 🤪

Sorry just seeing this, yes the entire bottle gets used

The clacking sounds like an injector hung open. Any smoke with it? It you get a constant tick at idle, it very well could be a blown head gasket. Check your coolant hose after it has completely cooled. If it is still pressurized, you likely have an issue. The good news is, the 2007 as far as I know all came with the riveted head gaskets. My 06 LBZ still had the crimped design, but it changed mid build on the 2006 to the riveted designs.

Paul the Wxguru yes I have a tick at idle I’m hoping it’s just dirty injectors getting some injector cleaner tomorrow I hope that will fix the problem if it’s a head gasket I don’t know what to do I don’t know how much they are but anyway sometimes when I drive my truck some days it’ll run smoother than other days it’s weird like it’ll run good one day and the best day it will run rough I don’t know hope it’s not a head gasket or I better have a deep pocket

@@gamerbeastboy1842 that sounds like injectors are worn out. How many miles on truck? On the LBZ a shop will charge about $2600-3000 for injectors and install as a package. I had head gaskets done and had them replace all of the rubber hoses while they were working on it....and clean the EGR. Total was about $3900.

Paul the Wxguru I’m probably just gonna get an EGR delete kit and thanks for all the help I’ve really been wondering what was wrong and I checked the coolant hose and pressed on it it’s all good so I don’t have bad head gaskets or anything sounds good man again, thank you for all the help oh and the truck almost has 198,000 miles on it

@@gamerbeastboy1842 with 198000 your injectors probably are getting a bit worn out. Regardless of the EGR delete kit....get the cleaner and run like the video here. Then get a bottle of the Stanadyne blue or gold label (most expensive)....and dump the entire bottle in a tank of fuel. That is not typical....but it will help also. After that, run the Stanadyne Lubricity formula (purple label) with each fill up.

When disconnecting the fuel lines like this, the lines that are connected and in the jug are full of air. Priming the lines draw fuel from the jug thru the lines and into the filter. Had I not primed it, it would have died due to drawing air. The filter is drawing off the jug at that point for the duration. Same concept still applies.

brian k I believe so because you are hooking these lines straight to the fuel rail where you have pulled the primary fuel lines. I would just make sure whatever container you do this from is 100% clean and dry. I used a purified water container that was empty, and dry. No grit or anything in it. Wouldn't want to chance sucking something like dirt grains or sand into an injector...that would suck the big one.

Thanks for that tip!

The entire bottle

This product is a fuel injector cleaner. If you buy the bottle in the video....it should do the trick. DO NOT add it to the tank. It must be mixed in a container like I did and run from the fuel lines in the engine bay. Both gas and diesel use fuel injectors and this product do not state gas vs. Diesel injectors. Check around on some diesel forums if need be for peace of mind.

Paul the Wxguru completely understand but I can’t find bottle at any local parts stores out here only gm dealers carry it but won’t sell it cause it states in there system that acdelco bottle is for gas engine only due to that reason they won’t sell it to me ...

@@leonmatos5367 I would check around Ebay, amazon, other places. Apparently they discontinued this product and went to a different product....likely to try and capitalize on the diesel market. Bet they create a product soon targeted at diesel applications.

But they most likely had your injectors and filter and a mechanic ready to take your money why would you go to a dealer stealer just punch the numbers on ebay and the name of the product

Yep you can....I would clean it while you have it out. If you get a new injector it would need to be programmed into the ECM before installation I believe so everything works right. But since it is same injector just pop it back in.

You don’t have to program new injectors necessarily

AirborneTejano Some people do this every oil change. Now that I hit 200K last month, I probably will do mine every 7500 miles. That gets expensive but injectors cost alot more in the long run!!

How much do you use for each cleaning?

AirborneTejano the full bottle. You mix with atleast a half gallon of diesel

Need to be using fuel grade lines yes. I would not use clear.

Gary Campbell I had a blown head gasket at one point. This was just a cleaning to try and take care of the injectors since they were up around 200,000 miles.

@@paulthewxguru5899 So how much did it cost to fix the head gasket? I have an 05. Not sure if it has a blown head gasket or not but I see a puff of white smoke once in a while.

@@ozziecrosby2092 I had them preface both at same time and use Grade C gaskets. I also had all of the rubber hoses replaced while they had top torn off, clean injectors and clean egr. Total with everything was $3,700...and that was a labor rate of $75 which is a bit below average for hourly rate. I was fortunate to have a great diesel mechanic close who didnt gouge

@@paulthewxguru5899 delete egr.they kill engines

It was running well when I sold it. Had 212,000 on it and going strong