The 2.2 diesel are built like tanks...
I have done a head job on mine and the parts are very costly...
Here is something..when searching for parts you can also ask for parts to 82-87 isuzu pup diesels....they have the same motor and most parts store will list the same exact part cheaper under the isuzu pup as opposed to a luv...its kinda weird....
A head kit for my truck listed under a 81 luv...was almost 350 dollars.....
Looked for the same kit under a 82 isuzu pup and got the same kit and same part numbers for 150.00.....its weird
My luv currently gets about 42 mpg last time a checked.....