The Cummins ISX diesel engines are used in RVs and trucks.
Owners have reported these problems:
- Leaking EGR valve
- Camshaft flattened
- Cracked and Dropped cylinder liners
- Turbocharger lags
- excessive oil consumption
- Excessive smoke, white, blue, black
- Timing wedge fails
- Rough idle
- Lack of power
Video explaining various issues:
isx12 Specs:
6 cyl
11.9L
385 – 650 hp
1450 – 2050 lb-ft
bore 130mm, stroke 150mm
2660 dry weight
48 qts of 15W40 oil
isx15 specs:
6 cyl
14.9L
400 – 450 hp
1450 – 1750 lb-ft
bore 137mm, stroke 169mm
18.9:1 compression
50 quarts of 15W40 oil
dry weight 3186 lbs
You can change the oil with these tools:
1/2 inch wrench to remove drain plug
funnel
drain pan
It is a solid engine that can last for 300k miles or more with a rebuild. One owner has reported 1.5M miles.
The ISX is used in Monaco Signature and American Eagle Motorhomes.
It looks like this:
