We’re looking at an EGR valve on a Mercedes MBE 900 diesel engine. It isn’t working properly as shown in the video using the Mercedes DDDL 7 diagnostic software to check it out. By pulling it off of the intake it’s easy to see the valve open and close. Commanding the EGR with the software… Continue reading EGR Valve Troubleshooting
This particular Mercedes diesel engine model is a 2008 and emission controlled. I can say for sure that any exhaust leaks on an emission controlled engine will create not only an engine code but also derated performance. Once the code shows it’s ugly icon on the dash nothing really feels different until over time it… Continue reading Mercedes Diesel Engine Exhaust Leak
The Cummins ISB diesel engine is a great piece of machinery and my first choice any day. It comes with the Allison 2500 series automatic transmission in our conventional buses and they work together extremely well. Those 2 components have given us minimal breakdowns. I shouldn’t say breakdowns more like minor inconveniences. The 250 horsepower… Continue reading Cummins ISB Diesel Engine
NOTE: So no one will think I was just dumping coolant on the floor and in to the city drain system and with respect to the EPA….The video showing the leak in question is draining water on to the floor. It’s not coolant since it was all lost (somewhere on a barren logging road) at… Continue reading Coolant Leak MaxxForce 7 Diesel Engine
The EGR cooler on this MBE 900 diesel engine developed a massive exhaust leak. The cause was the rear elbow at the cooler had worked it’s way out of the housing which caused the problem. This produced a lot of wear at the EGR cooler housing where the steel sealing rings sit. There’s not going… Continue reading Mercedes MBE EGR Cooler
This particular problem is on a 2009 Cummins ISC diesel engine. This model is an inline 6 8.3 Liter running in a Thomas HDX pusher school bus. The amber light presented itself on a field trip but did not cause any running problems mainly because it was an emission code. When the onboard computer does… Continue reading Cummins ISC Diesel Engine Code 1899
It’s true oil samples can find an issue way ahead of the obvious which means it’s usually too late to save an engine from catastrophic failure. If the driver comes to me with an engine noise complaint I always hope it’s a loose charge air clamp or fan belt. The difference between finding engine wear… Continue reading Oil Sample Reports Valuable
It’s a great feeling to find a problem on a diesel engine and repair it without any comebacks. In the mechanic’s trade a comeback is a dirty word. Sometimes it can’t be helped but it still happens. However when you get a win it makes up for any negative occurrences. The diesel engine in this… Continue reading Diesel Engine Code Elimination
I phoned the representative for this mobile EGR system cleaning machine called the DFS 910. At first I wasn’t interested but thought about the actual labor involved to remove EGR system parts just for cleaning purposes. When adding everything up it was worth a try to get hooked up with this machine and see if… Continue reading Diesel EGR System Cleaning
If you have ever worked on a diesel engine with emissions you’ll recognize the part featured in the photo. It’s a sooted up DPF (diesel particulate filter) cartridge. This one was giving us some trouble with an engine code that pops up when the turbo boost is not at the proper level. The cause of… Continue reading Diesel Engine DPF Replacement
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