DaveB
Long Jeep Fan
- Location
- Holladay, Utah
I am trying to fix a friends 99 Grand Cherokee that they toasted the motor in. The original motor was run out of water after a bad head gasket leak. I took the head off and found water in all but one cylinder. One cylinder had obviously been sucking water for a while since it was steam cleaned and had a shiny piston with no carbon on it. That cylinder also is showing scuffing on the cylinder wall so I think the piston is starting to go. The engine has also had water in the oil but I don't know for how long.
After finding all this I found a low mileage 4.0 from a 2001 XJ to swap into it. Last night as I was pulling things apart to do the swap when I realized that I had a problem. The 99 4.0 in this Grand Cherokee has different motor mount bolt pattern on the block
and the 2001 motor won't bolt up . I have looked at every 4.0 that I own which includes an 87,89,92,96,99(TJ), and this 2001 and they are all the same but this 99 Grand 4.0 is different. Why would they make a 99 Grand motor different than a 99 TJ motor ?
What years of Grand Cherokee motors will fit this thing ?????
After finding all this I found a low mileage 4.0 from a 2001 XJ to swap into it. Last night as I was pulling things apart to do the swap when I realized that I had a problem. The 99 4.0 in this Grand Cherokee has different motor mount bolt pattern on the block
and the 2001 motor won't bolt up . I have looked at every 4.0 that I own which includes an 87,89,92,96,99(TJ), and this 2001 and they are all the same but this 99 Grand 4.0 is different. Why would they make a 99 Grand motor different than a 99 TJ motor ?What years of Grand Cherokee motors will fit this thing ?????
