75 series 2H to 12HT conversion?

[pjb75]

Im thinking about replacing my 2H with a 12HT & am just after some info.
Can I use existing engine mounts,alternator,power steer pump,radiator/fan shroud and do I need a vacuum assist clutch master cyl?
Whats involved in changing the engine stop from electric to vacuum & also what is involved in setting up the pre heat screen, (can it be wired through the glow plug relay?) I havent seen anyone do this conversion on a 75 before but ive heard its possible. Any help would be great.

[sco_aus]

I know its a bit late mate, but give me a couple of days and i'll answer as much as I can. I have just done this conversion in my troopie and would to post it up for anyone who has been in our boat.

[nilla60]

sco_aus, did you get to see inside your 12HT? I've heard a lot about how it's supposed to differ from the 2H, but never heard any first hand accounts.

[sco_aus]

Unfortunately not. I know they have a different head and I believe a slightly different stroke and imagine different compression, but I dont know the details. I'll ask when at the workshop on Wednesday as i'm curious too. It will be on Wednesday that I find out the rest of the info too.

[oliver]

g'day gents

Any posts on the 12HT certainly get my attention. Gotta love that engine. Rebuilt mine in the garage at home about 18 months ago. Bit sad when I got it, as it had a broken piston, seized bigend and was all sludged up. Picked it up for a grand at the wreckers out of an HJ61 manual. Now its powering the shorty real nice. Still kicking myself that I didn't take any pics at the time - too concerned about getting it right the first time ($$$). Some installed engine pics on the FJ40 Thread tho.

After stripping and rebuilding it myself, imho a fantastically strong and beautifully made engine. Bulletproof. Regarding the pre-heat screen - I never bothered as it just seemed too hard to wire into the 40's electrics. Turned out I've never needed to pre-heat it anyway, as being a direct injection engine, it always starts first kick whatever the outside temp! No probs at all on a frosty morning using HPR Diesel (treacle) - don't know about snow tho.

cheers
Oliver