The Cummins 8.9 ISL was made from 1999-2007.
Owners have reported these problems:
- Turbo hose falls off
- Water pump fails
- EGR cooler breaks
- Grid heater plugging
- Camshaft Failure
- Crankshaft Failure
- Lifter/Roller Failure
- Connecting Rod Failure
- Spun Crankshaft Bearings
- Cracked Cylinder Head
- Scored Pistons and Liners
- Over Fueling
- Lack of oil or oil pressure
- Extreme Blow By
- Dropped Valves
- Overheats going uphill
The engine uses 24 qt of 15-40W or 10W30.
It is used in buses, trucks, and motorhomes.
It sounds like this:
Specs:
6 cyl diesel engine turbo charged
8.9 L (541 ci)
bore 114mm, stroke 145mm
16.6:1 compression
280 – 400 HP
700 to 1255 ft-lbs
Weighs 706 kg dry
Cast iron cylinder head and block
8 MPG in city
There are 3 versions of the 8.9:
ISL 1999-2007
ISL9 2007-2017
L9 2017+
