I love a good episode of Mechanical Mystery Theater! :) The STC valve had means and opportunity, but no motive. The injectors are looking very suspicious, but they keep their internal operations well concealed. Tune in to the next episode where (we hope) misbehavers will be brought to justice and order will be restored!
Cummins also call it two adjustments one is inter Circle and outer circle adjustment. I been told never try rebuild a STC valve, cause the engine can run a way. And on a out of around adjustment you use a 5in lbs to all values. I hope I'm right it's been a long time for when I did one.
Thank you for the schematic.of the STC system. Visual aides-I guess I am more of a visual learner-really helps me understand technical jargon just as you laid out in this video.
I worked at a pre owned truck dealer, we bought out a fleet of old Ford L9000 quad axle dump trucks from a local contractor. They were time capsules. All powered by L10 Cummins backed w 8LL. The phone rang off the hook about those trucks until the last one was gone. I sold one to this old timer, he “tuned” the injection pump in the parking lot with his pocket knife just before he took off. The L10 Cummins will always remind me of those old Fords and that old guy
Wes, NO unqualified person should disassemble a STC injector nor any other injector for that matter due to “class fit” tolerances being observed in a clean room. If the STC valve is working as you showed and all injectors are bypassing air except a clogged injector then the Cummins procedure is to R & R the injector(s) as necessary. I was laughing when you did your initial testing but, I was very glad to see you found your mistake. Then you stumbled on the injector check valve issue while explaining and thinking. Your a good mechanic man and don’t talk bad or second guess yourself, your a very thoughtful and read the theory of operation type of guy.
Nice detective work Wes👍. That stuff is testing and brain twisting at times. Always makes sense after a good hard look and some rest. I'm not sure I could have controlled myself. That injector would have been in pieces on my bench. Keep up the videos. 👍
Umm... Somehow that cap jumped off the top of the injector and I had a look inside. There is some wear in the tappet. It also appears that the hole was not machined correctly and the passage was never open. So who knows...
Used to have several Mercedes straight trucks at Roadway Express Atlanta GA. Those diesels covered the loading dock like fog during the winter while idling a couple of hours before dispatch. They were brutal
I looked the boxes at Menards over pretty good and the Harbor freight ones seem better. We have guys in the shop with both and the harbor freight one feels more rigid. This is only on the big boxes. The 44" box at menards was better built than the HF in the store. The Kenworth dealer was the cheapest place for me to buy Cummins parts. Typically I find the recons are cheaper than getting what I have fixed.
I don't like the drawer configuration on the Harbor Freight. It has one long drawer, which is what I currently have. The Menards box has 3 long drawers. Nothing cheap about Cummins parts, recon or not.
@@WatchWesWork a couple guys at work have the bigger menards boxes and they have definitely held up im not sure on how well they roll our shop doesnt require much moving, a box could sit for 10 years. But they like them
I know this is an old video and shipping would be a long way but I can't tell you enough good things about a place here in texas called M&D distributors formally texas fuel injection...they can rebuild any injector I've taken them so far and even Bosch fuel pumps.
Use a butterfly impact on the exhaust studs. It doesn't have enough power to break them but it may shake the rust out. It worked on 7 of 12 for me. I had to buy a set of twelve point sockets when I came across a 12 point bolt.
Great video I have no thought on the tool box we have 5 models around here maybe 6 and they each have a purpose for us of course you need to hold more stuff then these two micro-machinists. I like to understand this diesel mechanical work as we have no diesel knowledge so we are all eyes learning everything we can. We do know a good truck when we see one your truck is something we would love to have one of for personal use (pick up small vintage machines) only of course.
@@WatchWesWork Hey you are right about having things laying around for that day you need them costing money, We normally do not write a reply to a reply because we know and see you are busy but thought I should share something important. We are actually marveling at your skills Wes you see we watch you change wheel bearings/oil leak in a Clark Forklift rebuild some cnc machines and find them homes service a diesel truck so to us you are really a great mechanical guy and that is why we watch you even if in the diesel topic it was not what we are doing so thank you and have a Merry Christmas.
I don't like the idea of a 24" deep toolbox. Very easy to tip if you have a few drawers open. 30" deep is better. Looks like the ultimate toolboxes are made in the usa. Just my thoughts. Keep up the great videos you have a great channel.
Near me is a company called Stor-loc who make tool boxes that are very deep. But, I don't like the drawer layout. I'd think a 30" box would be hard to maneuver.
Wes, what happened to the cool truck? I enjoyed your trips and it just disappeared. I saw or heard no comment about it. Guess you sold it…. Thanks for all you do and the way you do it. Mac
I sold back when the pandemic started. I had not used it in several months. It cost me around $3500 a year to keep it on the road. It just was not worth it.
Wes, Back on the truck repair. Is it running at idle on all cylinders? I'm surprised you didn't swap your good injectors with #5 just to troubleshoot, swapping is cheaper than throwing BIG $$$(Injectors) at a problem like that. BTW, My son is awfully rough(really) on his equiptment, his big Snapon box with wings has stood the test of time. Check with a dealer, you might get a good deal on a repo box. But there is no way too move big boxes when they are loaded, so you still need roll-carts.
It's not really a miss. I tested for a miss by holding each injector rocker arm down. I'll talk about it in the next video, you need a special tool. It's technically a timing issue. I estimate the engine has around 400,000 miles on it, so it's time for injectors regardless.
The Dr. Seuss method - when ya can't directly verify where the problem is, verify places it isn't. Eventually yer left with one thing. It has served me well over the years! How often do you fly out to a repair job?
I know this video is 2 years old and it's too late to help or save you now, but this masterforce is nothing like an extreme tools tool box! There's a reason the extreme tools box is three times as expensive. Extreme tools box is $1,100 pounds empty! You can stand in every drawer there's double drawer slides on every drawer Etc. The extreme tools tool box built stronger than any Mac Matco for Snap-on box for 1/3 of a price of one of those but definitely not the same Chinese tool boxes you find out a big box store.
I’m sure you’ve already answered this question but what is that flashlight you’re often using with the big folding cob. I’ve been trying to find it and there are many like it but I don’t think I’ve seen that one in any of my searching. Thanks.
I have a 91 Mechanical N14 and it smokes for about 10secs when I cold start it but when it warms up around 160-180 degrees it starts to blow alot of Blue smoke and it smells like fuel. I got my injectors rebuilt but no luck. I'm thinking it's the STC valve
Wes your close to the problem but, not quite there bud. I’m a cummins tech and I primarily work on common rail engines but, I’m the only guy at my shop that knows the earlier fuel systems. Honestly, all the way back to the mechanical engines including the V8 903’s and I work on anything from 2.8L to 19L engines. So pretty much everything that came in trucks or smaller. The old L10/10.8L, 855/14L and K19/19L STC engines which became the M11, N14 and K19 Celect engines. These engines all suffered this problem in variation and all had issues with the check valve in e top of the injector sticking. The fact you couldn’t stick a 0.040” wire in the injector lube Port is incorrect because, the check valve ball is what’s stopping the wire from entering the injector.
My brother, I ask you for your help. I have a Cummins ISL8.9 engine that does not start. I knock it on and it does not start, but if we do a little oil delegation to the hobby, it will work. There is a light on the dashboard called Warning. Please help. Thank you very much.
Hey Wes, really digging the vids and that you are back making em. If you gotta work alone, talking to us on a video must help a little to pass the time. Also, when you have to explain something, it really forces you to actually follow through and understand it yourself... Do you find that true about making your videos?
You should see the out takes! It's hilarious when I watch them. I'll say something that sounds real smart then I'll literally say out loud, "wait, is that true?" I know one thing, you don't want to be wrong on the internet... It definitely forces you to think before you open your mouth on video.
Not sure about the toolbox, sounds extremely pricy. You can get the chinesium ones in Germany with the same size, with a rubber working surface for 300 bucks including shipping and 2 years warranty. For 1.2 k you would get a toolbox manufactured in Germany by Hazet or Gedore, but granted, not in this size.
hola buenos días como es posible tener acceso a un manual del motor Cummins ALT 10 para reparación ibajuste en español por favor. abuela Macías Colombia
the thing most people don't get is Chinese products are only as bad as the person ordering them, they can make you state of the art for anything but the people buying the products in bulk to sell to us cheap out to make money out of us
I don't have access to menards where I live, but the Harbor Freight ones really do look good- i saw an impressive review of them vs. the home depot ones recently, and it might give you some idea of what construction details to look for: czcams.com/video/jZl7hVhD3Gw/video.html
Wes Wes Wes. The fuel line to the STC valve pushes on a basically a disc, only the clearance restricts the fuel pressure causing it to move, the fuel pressure goes past the disc equalizers and the Piston don't move, meaning the valve in the oil part doesn't function, I believe there's a return line on the STC valve that connects to the fuel return line back to the tank. Unless there's a blockage somewhere it should work, The oil pressure that doesn't drop off when you applied air to the valve had no effect without that return line on the STC valve. When it's working properly at approximately 70 psi fuel pressure the valve is supposed to relieve the oil going to the injectors causing them to collapse meaning the fuel is trapped and injected app 8 to 12 degrees later so at higher rpms the fuel isn't injected too early ( to much advance). Check for a fuel return line from the STC valve to the fuel return line back to the tank. HOPE THIS HELPS, there's a accorn nut on the STC valve to adjust the point where the valve functions, Cummins don't want you to know that. Good luck and all the best to you SIR.
Do you think there is any chance there is a crack or loose fitting in the suction line to the oil pump sucking in the air? Second you might watch "Terry Chron" video Cummins L10, M11 & N14 Injector Troubleshooting czcams.com/video/JLjVFJpowbo/video.html he even offers free call in help Cheers John
I love a good episode of Mechanical Mystery Theater! :) The STC valve had means and opportunity, but no motive. The injectors are looking very suspicious, but they keep their internal operations well concealed. Tune in to the next episode where (we hope) misbehavers will be brought to justice and order will be restored!
Steve Canny, Your avatar is just awesome!
Exactly this!!
Cummins also call it two adjustments one is inter Circle and outer circle adjustment. I been told never try rebuild a STC valve, cause the engine can run a way. And on a out of around adjustment you use a 5in lbs to all values. I hope I'm right it's been a long time for when I did one.
Well said @Steve Canny
"if you said 100 dollars, you must work for cummins" giggled audibly at that one
Thank you for the schematic.of the STC system.
Visual aides-I guess I am more of a visual learner-really helps me understand technical jargon just as you laid out in this video.
I worked at a pre owned truck dealer, we bought out a fleet of old Ford L9000 quad axle dump trucks from a local contractor. They were time capsules. All powered by L10 Cummins backed w 8LL. The phone rang off the hook about those trucks until the last one was gone. I sold one to this old timer, he “tuned” the injection pump in the parking lot with his pocket knife just before he took off. The L10 Cummins will always remind me of those old Fords and that old guy
Wes, NO unqualified person should disassemble a STC injector nor any other injector for that matter due to “class fit” tolerances being observed in a clean room. If the STC valve is working as you showed and all injectors are bypassing air except a clogged injector then the Cummins procedure is to R & R the injector(s) as necessary.
I was laughing when you did your initial testing but, I was very glad to see you found your mistake. Then you stumbled on the injector check valve issue while explaining and thinking. Your a good mechanic man and don’t talk bad or second guess yourself, your a very thoughtful and read the theory of operation type of guy.
Menards is outstanding! I hauled many a load to their stores throughout the mid west.
Another great video Wes!!!
Great video again!!
Nice detective work Wes👍. That stuff is testing and brain twisting at times. Always makes sense after a good hard look and some rest. I'm not sure I could have controlled myself. That injector would have been in pieces on my bench. Keep up the videos. 👍
Me too, not that it would have been a good decision!
Umm... Somehow that cap jumped off the top of the injector and I had a look inside. There is some wear in the tappet. It also appears that the hole was not machined correctly and the passage was never open. So who knows...
@@WatchWesWork LOL, That's strange. Very possible it was never correct to begin with. It would be nice to know for sure.
Thumbs up 👍 great video and explanation.
I know this is a year late .. but ... 16:45 .. nothing on 5, nothing on 6 ... I thought I had somehow changed channels and started watching LPL!
Used to have several Mercedes straight trucks at Roadway Express Atlanta GA. Those diesels covered the loading dock like fog during the winter while idling a couple of hours before dispatch. They were brutal
If u can't fix it, it ain't broke!
Have a great holiday!
I looked the boxes at Menards over pretty good and the Harbor freight ones seem better. We have guys in the shop with both and the harbor freight one feels more rigid. This is only on the big boxes. The 44" box at menards was better built than the HF in the store. The Kenworth dealer was the cheapest place for me to buy Cummins parts. Typically I find the recons are cheaper than getting what I have fixed.
I don't like the drawer configuration on the Harbor Freight. It has one long drawer, which is what I currently have. The Menards box has 3 long drawers. Nothing cheap about Cummins parts, recon or not.
@@WatchWesWork a couple guys at work have the bigger menards boxes and they have definitely held up im not sure on how well they roll our shop doesnt require much moving, a box could sit for 10 years. But they like them
Last time I did a injector in a big cam 855 I had to go to town and buy a 3/8” 12 point socket
I know this is an old video and shipping would be a long way but I can't tell you enough good things about a place here in texas called M&D distributors formally texas fuel injection...they can rebuild any injector I've taken them so far and even Bosch fuel pumps.
Very good ser
Use a butterfly impact on the exhaust studs. It doesn't have enough power to break them but it may shake the rust out. It worked on 7 of 12 for me. I had to buy a set of twelve point sockets when I came across a 12 point bolt.
The good news is that these are pretty easy to get to.
The masterforce toolbox is really well worth the money
Great video I have no thought on the tool box we have 5 models around here maybe 6 and they each have a purpose for us of course you need to hold more stuff then these two micro-machinists. I like to understand this diesel mechanical work as we have no diesel knowledge so we are all eyes learning everything we can. We do know a good truck when we see one your truck is something we would love to have one of for personal use (pick up small vintage machines) only of course.
It's handy, but not a cheap toy to have around.
@@WatchWesWork Hey you are right about having things laying around for that day you need them costing money, We normally do not write a reply to a reply because we know and see you are busy but thought I should share something important. We are actually marveling at your skills Wes you see we watch you change wheel bearings/oil leak in a Clark Forklift rebuild some cnc machines and find them homes service a diesel truck so to us you are really a great mechanical guy and that is why we watch you even if in the diesel topic it was not what we are doing so thank you and have a Merry Christmas.
Area Diesel Service is the BOMB
I don't like the idea of a 24" deep toolbox. Very easy to tip if you have a few drawers open. 30" deep is better. Looks like the ultimate toolboxes are made in the usa. Just my thoughts. Keep up the great videos you have a great channel.
Near me is a company called Stor-loc who make tool boxes that are very deep. But, I don't like the drawer layout. I'd think a 30" box would be hard to maneuver.
Thumbs up 👍 knowing knowledge Learning
Wes, what happened to the cool truck? I enjoyed your trips and it just disappeared. I saw or heard no comment about it. Guess you sold it…. Thanks for all you do and the way you do it. Mac
I sold back when the pandemic started. I had not used it in several months. It cost me around $3500 a year to keep it on the road. It just was not worth it.
Next time checkout Midwest fuel injection I believe they have several locations in IL
SHE GOT A CAM IN ER! Hehe, all engines have a cam unless they ring or brap...
This episode is very intriguing 🤔 @Watch Wes work
Wes, Back on the truck repair. Is it running at idle on all cylinders? I'm surprised you didn't swap your good injectors with #5 just to troubleshoot, swapping is cheaper than throwing BIG $$$(Injectors) at a problem like that. BTW, My son is awfully rough(really) on his equiptment, his big Snapon box with wings has stood the test of time. Check with a dealer, you might get a good deal on a repo box. But there is no way too move big boxes when they are loaded, so you still need roll-carts.
It's not really a miss. I tested for a miss by holding each injector rocker arm down. I'll talk about it in the next video, you need a special tool. It's technically a timing issue. I estimate the engine has around 400,000 miles on it, so it's time for injectors regardless.
Is it sad or awesome that I could sit and watch that exhaust flapper go for like an hour straight and be perfectly content?
It's awesome. :)
It’s awesome.
It's sure as hell better viewing than the updated Equalizer.
Im wondering will this truck fall under theJ1708 are J1939 So did you throw any misfire Are injector codes if it’s an electronica engine
The Dr. Seuss method - when ya can't directly verify where the problem is, verify places it isn't. Eventually yer left with one thing. It has served me well over the years!
How often do you fly out to a repair job?
I haven't been on a plane in over a year.
0:03 mint, mint, mint….
I know this video is 2 years old and it's too late to help or save you now, but this masterforce is nothing like an extreme tools tool box! There's a reason the extreme tools box is three times as expensive. Extreme tools box is $1,100 pounds empty! You can stand in every drawer there's double drawer slides on every drawer Etc. The extreme tools tool box built stronger than any Mac Matco for Snap-on box for 1/3 of a price of one of those but definitely not the same Chinese tool boxes you find out a big box store.
I’m sure you’ve already answered this question but what is that flashlight you’re often using with the big folding cob. I’ve been trying to find it and there are many like it but I don’t think I’ve seen that one in any of my searching. Thanks.
It's a Braun I think from Harbor Freight here in the USA.
Ah. I hadn’t thought about Harbor Freight.
I have a 91 Mechanical N14 and it smokes for about 10secs when I cold start it but when it warms up around 160-180 degrees it starts to blow alot of Blue smoke and it smells like fuel. I got my injectors rebuilt but no luck. I'm thinking it's the STC valve
Wes your close to the problem but, not quite there bud. I’m a cummins tech and I primarily work on common rail engines but, I’m the only guy at my shop that knows the earlier fuel systems. Honestly, all the way back to the mechanical engines including the V8 903’s and I work on anything from 2.8L to 19L engines. So pretty much everything that came in trucks or smaller.
The old L10/10.8L, 855/14L and K19/19L STC engines which became the M11, N14 and K19 Celect engines. These engines all suffered this problem in variation and all had issues with the check valve in e top of the injector sticking. The fact you couldn’t stick a 0.040” wire in the injector lube Port is incorrect because, the check valve ball is what’s stopping the wire from entering the injector.
I believe that I have the same problem
My brother, I ask you for your help. I have a Cummins ISL8.9 engine that does not start. I knock it on and it does not start, but if we do a little oil delegation to the hobby, it will work. There is a light on the dashboard called Warning. Please help. Thank you very much.
Hey Wes, really digging the vids and that you are back making em. If you gotta work alone, talking to us on a video must help a little to pass the time. Also, when you have to explain something, it really forces you to actually follow through and understand it yourself... Do you find that true about making your videos?
You should see the out takes! It's hilarious when I watch them. I'll say something that sounds real smart then I'll literally say out loud, "wait, is that true?" I know one thing, you don't want to be wrong on the internet... It definitely forces you to think before you open your mouth on video.
Yes, yes I should see them! Someday you may have enough for a blooper reel, and I will make popcorn...
@@WatchWesWork ಠ_ಠ We know about the outtakes.
Easy, someone fitted a rally cam to that boy. Take to 3 grand and feel the powah!
They a ok tool box better than a Milwaukee they are not America or other tool trucks quality toolbox but for the money they're great
Not sure about the toolbox, sounds extremely pricy. You can get the chinesium ones in Germany with the same size, with a rubber working surface for 300 bucks including shipping and 2 years warranty.
For 1.2 k you would get a toolbox manufactured in Germany by Hazet or Gedore, but granted, not in this size.
Harbor freight toolboxes actually made very well and decent price look up comparison video versus husky toolbox
Harbor freight!
hola buenos días como es posible tener acceso a un manual del motor Cummins ALT 10 para reparación ibajuste en español por favor.
abuela Macías Colombia
the thing most people don't get is Chinese products are only as bad as the person ordering them, they can make you state of the art for anything but the people buying the products in bulk to sell to us cheap out to make money out of us
I don't have access to menards where I live, but the Harbor Freight ones really do look good- i saw an impressive review of them vs. the home depot ones recently, and it might give you some idea of what construction details to look for: czcams.com/video/jZl7hVhD3Gw/video.html
I sure do miss Menards. Home depot sucks.
Wes Wes Wes.
The fuel line to the STC valve pushes on a basically a disc, only the clearance restricts the fuel pressure causing it to move, the fuel pressure goes past the disc equalizers and the Piston don't move, meaning the valve in the oil part doesn't function, I believe there's a return line on the STC valve that connects to the fuel return line back to the tank. Unless there's a blockage somewhere it should work, The oil pressure that doesn't drop off when you applied air to the valve had no effect without that return line on the STC valve. When it's working properly at approximately 70 psi fuel pressure the valve is supposed to relieve the oil going to the injectors causing them to collapse meaning the fuel is trapped and injected app 8 to 12 degrees later so at higher rpms the fuel isn't injected too early ( to much advance). Check for a fuel return line from the STC valve to the fuel return line back to the tank. HOPE THIS HELPS, there's a accorn nut on the STC valve to adjust the point where the valve functions, Cummins don't want you to know that.
Good luck and all the best to you SIR.
Do you think there is any chance there is a crack or loose fitting in the suction line to the oil pump sucking in the air? Second you might watch "Terry Chron" video Cummins L10, M11 & N14 Injector Troubleshooting czcams.com/video/JLjVFJpowbo/video.html he even offers free call in help
Cheers
John
I'm going to check both. The sump is attached to the pan, so it can't really rattle around. I'll have to check that guy out.
Здравствуйте Подскажите как отрегулировать STC в верху регулировачный винт есть
Masterforce tool box might be okay but their power tools suck.
LT 10 Cummins most bad engine Cummins ever build. It is broken if it not making smoke and a lot of smoke.
Must have been really bad since Cummins stopped making them after 40 years...
Sounds like a 70 year old taking a poo.
Tool box junk get stappon or matco