Hilux 2L and 3L Head Differences

Ther is sweet bugger all difference between the 2LT, 3L, 5L internally as far as strength goes, they share the same block, head. The only difference is the bore/stroke and boost compensator fitted to the 2LT's injection pump. The 3L will handle a turbo fine, it all depends how it has been treated its whole life and what condition it is in prior to fitment and wat other precautions u take to look after it. U cant just throw a snale on at 10psi, wind the fuel up and hope it lasts. I think half the time they r ready to die and let go after fitment due to the owner abusing them more because they have more power to burn.

6-7psi with moderate fueling (3/4 turn on adjustment screw) would have to be the most frequent setup and is reliable as is. If u wind the boost up further to say 10-12psi ur going to have to wind the fuel up more to get the mix right and benefit from that boost, this is where intercoolers, larger mandrel exhausts and boost comensators come into play as ur exhaust gas temperatures and intake temps start to become undesirable as well as ur puttin more heat stress on the whole cooling system so bigger radiators and oil coolers can be looked at. The best guages u can fit are boost, aftermarket engine coolant temp and pyrometer, with these u can c when ur overfueling and wind down accordingly to u get it just right. turbo diesles r the opposite to petrol turbos, they hate running rich and will melt components internally if a pyro around 700c is run frequently, A petrol will do the same when running lean.

My 3L is 350000km old and has run 7psi with an aftermarket turbo since new, I have recently upped to boost to 10psi and it is loving it, I will most likely be rebuilding it when it dies so am not to fussed to find its limits. Also recently fitted a 10psi rollerbearing garret to a mates 3L which is 240k old and it is running better then ever. The engine will only last as long as u look after it with frequent 4-5000km oil/filter changes and TLC. Cheers


where i got some info.

about half to 2/3's down page...

another page
specs on various motors

oh also to new head bolts, as the old ones are stretched and stuffed.