I cannot answer this question.
yes some 4jb1 has belt type
valve clearrince 260 kb
6.9kms/liter
The head bolts on an Isuzu 4JB1 engine are usually rated at 57-67 foot-pounds new. The rods are rated at about 58-65 foot-pounds, and the mains are rated between 116-130 foot-pounds.
2.5l per kilometer loaded 20
You'd be lucky to get 30mpg tops
approx 5K per litre average
approximately 1L runs at 2kms depending on the weight of load or cargo
there is a plate on the firewall which has its identification engine should be 4jb1 (2.8 diesel) or 4ze1 (2.6 petrol)
0.40mm for both inlet and exhust when cold on 4jb1, 4jh1 engines
It is 0.40mm "Valve clearance (at cold) Intake mm(in.) 0.40 (0.0157) Exhaust mm(in.) 0.40 (0.0157)