weight of a 2F engine compared to 12H-T

[amauri]

Weighed the old 2F engine I pulled out of a US spec 1987 FJ60 for a comparison with the 12H-T that's going in.

Both engines are complete with all mounts and accessories, but no clutch, belhousing or starter.
My scale is pretty accurate, had it tested after I bought it from a local pawn shop nearly 20 years ago.


2F = 650-lbs
12H-T - 780 lbs

 

[DanS HJ-45]

Interesting. I would have guessed that the 2F would have been closer to 750lbs, so I'm surprised to see that big of a difference between the 2F and the 12HT.

Dan

 

[ozwallaby]

Have to say that seems to be a very big difference considering the similarity between the two..... Not that I have any evidence to put up... Gut feel is something is amiss tho......

 

[amauri]

The 12H-T operates with more than twice the compression ratio of the 2F, therefore all the parts have to be thicker/stronger to handle the combustion pressures.

Heavier cyl head, block, pistons, rods, etc...

I was surprised to see there was only 130-lbs difference between the two.

 

[ticoman]

I too am impressed with the weight of the 2F there is a lot of metal there for a gasser. They usually weigh a good bit(200 LB ) less than a comparable diesel.

 

[Flight2k5]

Everything I have ever read about the weight of the 2f, it's been right around 800 pounds.

 

[amauri]

Unfortunately, there is a lot of misinformation circulating around via hear say.
Not talking about this forum specifically, it is a problem everywhere you look these days.
I’m a skeptical old fart and just don’t believe anything anyone tells me, I have to see it for myself.

Landcruisers are my hobby, my full time job is working as a mechanic responsible for preparing racing motorcycles competing in AMA Professional Racing.

The bikes are scrutinized at each event and must meet minimum weight requirements set by the rules.
I use this same scale to weigh every race bike I build and have never failed a pre-race tech inspection with the official AMA scales.

My weight readings for these motors are accurate.

 

[ticoman]

where did you find the 12H-T I thought they were like hens teeth in the u.s. Is it going in an 80?

 

[amauri]

This is the fourth 12H-T conversion I've done since my first in 1992, I've had it in storage since I got it from Marv about 10 years ago.
A nice low mileage motor from Japan.

 

[rick_d]

The original poster is the grand dad of diesel conversions to land cruisers in the US folks.

an EXPERT at what he does.

 

[ozwallaby]

The 12H-T operates with more than twice the compression ratio of the 2F, therefore all the parts have to be thicker/stronger to handle the combustion pressures.

Heavier cyl head, block, pistons, rods, etc...

I was surprised to see there was only 130-lbs difference between the two.

Oops.. my bad on this one...I read it as 2h not 2f.....

 

[torfab]

Last month I lifted a 12HT/H55/Split case combo into a BJ74, and it weighed the forklift boom down quite a bit. I actually thought it would have been a bigger difference, and not just a wife's weight between the two.