2h 12ht
Posted: Mon Aug 23, 2004 5:43 pm
what needs to be done to fit a 12ht fuel pump and head fit onto a 2h block?
Hey
u need the pistons and rods aswell. Maybe even the crank, but i dont think so.
Andrew
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Posted: Mon Aug 23, 2004 7:54 pm
Posted: Tue Aug 24, 2004 2:07 pm
Why dont you just get the whole thing
Posted: Tue Aug 24, 2004 7:53 pm
have hole in side of engine can get cheap 2h block. want to know if I can use 2h block or are they different. 
Posted: Tue Aug 24, 2004 8:04 pm
They are thesame, sure of it.
So r 1hz and 1hdt blocks....
Andrew
So r 1hz and 1hdt blocks....
Andrew
Posted: Tue Aug 24, 2004 9:10 pm
block are crank are the same, just about everything else is different.
Posted: Tue Aug 24, 2004 9:49 pm
the block is the same pattern
howver there are subtle differences
Like piston skirt cooling (12HT not 2H) and also you will find that the oil holes for the turbo on the passenger side of the block are not drilled either(would have been easy to test oil pressure if they had been!). This will make oil lines for the turbo a pain, probably need to tap into the alternator oil line, or even drill and tap the holes into the gallerie while youve got the block stripped. The water line for the turbo is drilled and tapped on my 2H.
i myself was exploring an upgrade of the 2H to direct injection and ofcourse turbo, but by the time you collect all the manifolds etc it wasnt worth it, for me at least. If you already have everything then it shouldnt be real difficult to use a 2H block.
howver there are subtle differences
Like piston skirt cooling (12HT not 2H) and also you will find that the oil holes for the turbo on the passenger side of the block are not drilled either(would have been easy to test oil pressure if they had been!). This will make oil lines for the turbo a pain, probably need to tap into the alternator oil line, or even drill and tap the holes into the gallerie while youve got the block stripped. The water line for the turbo is drilled and tapped on my 2H.
i myself was exploring an upgrade of the 2H to direct injection and ofcourse turbo, but by the time you collect all the manifolds etc it wasnt worth it, for me at least. If you already have everything then it shouldnt be real difficult to use a 2H block.
Posted: Wed Sep 01, 2004 11:11 am
having downloaded the toyota 2H repair manual (also covers the 12HT) it would appear that it would indeed be very easy to use a 2H block for a 12HT.