2013 MaxxForce 7 viscous Engine Fan

This was a curious question I had on these viscous engine fan drives that are very stiff and run even when the diesel engine is cold. The Horton fan clutch design is beautiful because it does not move an inch until the engine temperature reaches the proper reading. I went on Youtube and found this… Continue reading 2013 MaxxForce 7 viscous Engine Fan

MaxxForce 7 Engine Code 3055

This MaxxForce 7 diesel engine gave us a bit of a challenge with intermittent engine shutdowns. The engine code 3055 (high pressure fuel pump related) led us to a solution in the way of a TSB (technical service bulletin). Apparently the wiring harness to the high pressure oil pump was causing a lot of headaches… Continue reading MaxxForce 7 Engine Code 3055

2013 MaxxForce 7 Diesel Engine Code 3055 Will Not Run

It all started back in 2013 when we purchased 8 International conventional school buses with the Navistar V-8 diesel engine known as the MaxxForce 7. I personally have never experienced a reliable V-8 diesel engine. Maybe it’s the designing around a V-8 engine block that makes it weak in some areas. One failure that was… Continue reading 2013 MaxxForce 7 Diesel Engine Code 3055 Will Not Run

MaxxForce 7 Running Check Engine Code

This problem was pretty straight forward using the Navistar Engine Software that led us directly to the problem. The engine code was the fuel rail pressure sensor. Most times it’s the sensor but due diligence is in order here just in case there’s a bad wire end or poor connection down the line. This engine… Continue reading MaxxForce 7 Running Check Engine Code

MaxxForce 7 Diesel Engine Forced Regen

It’s hard to believe that the MaxxForce 7 diesel engine regenerating in this video is manufactured by Navistar. Constant issues with these engines have cost us down time and expense over poorly designed components. I know everybody involved with the manufacturing of these models feels bad for the customers out there who are dealing with… Continue reading MaxxForce 7 Diesel Engine Forced Regen

2013 MaxxForce 7 Diesel Engine Performance Update

The eight 2013 MaxxForce 7 diesel engines we purchased for our fleet have proven to be a royal pain in the …well you know how that phrase ends. After five years half of the diesel engines needed to be replaced due to being totally worn out. All of them were repaired / replaced under warranty… Continue reading 2013 MaxxForce 7 Diesel Engine Performance Update

International MaxxForce 7 Diesel Engine Miss

I’ve heard of the rocker arm failing on the maxxforce 7 diesel engines and when I got a call from one of the drivers saying they were driving and suddenly had a power issue with a very rough running engine the rocker arm issue was on my mind. The bus limped back to the yard… Continue reading International MaxxForce 7 Diesel Engine Miss

MaxxForce 7 Diesel Engine Air Compressor Failure

The one advantage to a belt driven air compressor is the minimal labour to change it out. In this school bus with a MaxxForce 7 diesel engine built by Navistar the Bendix air compressor failed after three years. The oil went as far as the air tanks so this was a severe level failure. The… Continue reading MaxxForce 7 Diesel Engine Air Compressor Failure

DPF Replacement MaxxForce 7

Servicing a diesel particulate filter (DPF) is part of the maintenance involved with an emission controlled diesel engine. Our shop has to periodically clean or send the DPF out to be cleaned depending on it’s condition. Sending it out for cleaning runs around 500.00 and there’s no guarantee it’s going to pass the flow test… Continue reading DPF Replacement MaxxForce 7

MaxxForce 7 Diesel Engine DPF Failure

The video shows all the damage to the DPF (diesel particulate filter) on one of our MaxxForce 7 International diesel engines. This is the second diesel particulate filter that has failed this way. It seems to me this DPF has a definite weak spot. Only three years old and this “catastrophic failure” as the dealer… Continue reading MaxxForce 7 Diesel Engine DPF Failure