The Liberty used a VM diesel engine, the Grand Cherokee has used a Mercedes and a VM diesel engine.
VM Motori
How do you reset engine light on jeep liberty diesel
No, you cannot convert a gas engine to a diesel engine. A diesel requires much stronger parts.
JEEP xD
There is no 3.1 engine in any Jeep
The diesel engine in a 2005 Grand Cherokee is the OM 642 Mercedes 3.0L V6.
A version of the 3.0L diesel in the Sprinter is a available in certain Jeep Grand Cherokees.
Dodge
Briggs Diahatsu makes the 3 cylinder diesel engine for Kawasaki.
Combustion of instantly compressed diesel vapour or gas
Peugeot?
2100cc Renault Turbo diesel.- 85cv 2500cc VM Turbo diesel.- 116cv