Hi--
My 80amp alternator on my mid 90's 4JG2T is make the classic 'bad noise'... it's losing a bushing. Since I'm in the states... trying to find an 80A alternator for a 4JG2 is rather hard, but the 4BD1 version LR170-418 off a NPR truck in the same vintage "appears" be the same or very similar. The mounting holes are in the same spots, the vacuum pump looks the same... the output is slightly different at 70A.
Any one tried this? It's only $100ish on Amazon... and pics look pretty much identical.
The 4BD1 alternator off amazon:
http://www.amazon.com/Alternator-Isuzu-3-9L-Lr170-418-Lr170-418B/dp/B0081SB3GS/ref=sr_1_1?ie=UTF8&qid=1419292697&sr=8-1&keywords=LR170-418
The 4JG2 alternator off alibaba:
http://jdhco.en.alibaba.com/product/970189232-218337751/80_Amp_Alternator_for_3_1_d_isuzu_bighorn_trooper_with_4JG2_engine_USB69_.html
Thanks,
Ron Story
Portland, OR USA