It sounds like the inside of the engine is so sludged up that the entire top of the head is covered.
You will have no problem with that switch over.
is your timing off? are you getting any spark at all?
To turn the engine over.
There is absolutely no advantage of any Cherokee Jeep over any Toyota Highlander. I've had both. The Jeep spent more time in the shop than on the road.
doesen't have one. Have to do everything from the over flow.
check the crankshaft sensor
To answer your question, no...it's not overheating. Is yours?
All over the engine.All over the engine.
Yes it will, unless the Grand Cherokee has the V-8, otherwise it is a direct fit and bolt up. The basic block is the same,the accessories are different, you will have to switch everything over
Does it turn over? Does it have fuel, spark and compression?
right side of eng over the starter get it from the top
probably crank sensor, they are famous for that