dr who? wrote:...the spindle into the injector pump is pissing diesel out!! ...
the seal and shaft are available as a unit from toyota or aftermarket for about $30. Any diesel specialist will be able to supply the parts, fitting is about 2 - 3 hours, and it is quite possible to DIY without pulling the pump off. It is necessary to take the top cover off the pump and be very careful about matching up all the bits that come off, it's fiddly but not difficult.
i also suspect that the head is cracked too, its not too keen at starting in mornings and puffs greyish smoke when it finally starts, hmm im talking myself into an engine change arnt i!
as already suggested, it's probably just glow plugs, they are also pretty cheap and very easy to replace. test them first - take off the busbar and check for continuity, their resistance is very low and when they fail they go open circuit.
a cracked head will manifest one or more of: mysterious coolant leakage, mysterious cooling system pressurisation, oil in the coolant, coolant in the oil, overheating especially on hills, rough running at idle, possibly hydraulic locking after standing overnight, steam in the exhaust.
as for engine swaps, if you're going to do it you have to really, really, really love your LJ70 - the gearbox, axles and chassis will not cope with much more power/torque than it has now - if you 'fix' the engine by up-rating it, it's not rocket science to see how you'll have to 'fix' everything else. Coupled with the appalling, pitchy ride and patheitc off-road articulation, it's hard to understand why anyone would want to persevere with such a vehicle (I am a 3-time bundera owner), unless you are dedicated to also swapping in a proper gearbox and full sized rear axle.
I don't know where your 2L-T is at (nor which variant it is), however no matter which flavour it can have a few more ponies squeezed out of it without compromising engine life. Intercooling and fitting a better turbo yields impressive results and fitting an EGT and keeping the temps below 600C with boost around .8 - .9 bar is safe, and will keep you in top gear up most hills even with 35" tyres.
in the end it's your vehicle and you decide, but look at what else you could do with the same cash you think you'll spend on the conversion (include axle and gearbox, you'll have to do it sooner or later) plus the price you might get fromt he sale of the bundy, if you don't hink you can live with the mighty 2L-T any more.
cheers
DD