random 2f/3fe engine question.

[Roastchestnuts]

If you have a 3fe Block can you put a 2f head on it and make it a 3f ish? I kinda want to buy another engine block to rebuild as a project/back up engine. ANd honestly to keep me busy. The 3fe blocks seem to be cheep. Its kinda the opposite of what people seem to do though. This is more of a curiosity I guess Not looking to why or why nots just can it be done and it run?

 

[MOTOV8R]

Search “2fe”

Post in thread '1969 fj40 3fe cylinder head on 2f block project'
1969 fj40 3fe cylinder head on 2f block project - https://forum.ih8mud.com/threads/1969-fj40-3fe-cylinder-head-on-2f-block-project.1299365/post-14709458

 

[Roastchestnuts]

Search “2fe”

Post in thread '1969 fj40 3fe cylinder head on 2f block project'
1969 fj40 3fe cylinder head on 2f block project - https://forum.ih8mud.com/threads/1969-fj40-3fe-cylinder-head-on-2f-block-project.1299365/post-14709458

Yeah but I want to know opposite of that. a 3fe block with a 2f head. I guess if the 2f block works with a 3fe head it should work the way I am thinking?

 

[MOTOV8R]

Yeah but I want to know opposite of that. a 3fe block with a 2f head. I guess if the 2f block works with a 3fe head it should work the way I am thinking?

Sorry didn’t read your post carefully enough. Not sure on the answer to your question.

 

[Roastchestnuts]

Sorry didn’t read your post carefully enough. Not sure on the answer to your question.

its a wierd one I hope somebody could answer. I know you could find a 3f carb head and put it on the 3fe block. but the 3f heads are hard to come by.

 

[Living in the Past]

The 3F block is shorter. Because of that I believe the reason why Toyota raised the RPM red line up 500 when the FJ62 started in the US 8/87. Other markets the carbureted 3F started 11/84. Those were FJ62s not FJ60s. If the 3F Carburetor intake manifold and exhaust manifold could be source would probably make a decent engine. Not sure how it would work with a 2F manifolds. But with the short stroke 3F block might be better than 2F on the pavement.

 

[cruisermatt]

yes if it is an +85 head that would be a 3F. +85 2F head is the same as 3F. You'll want to use the accessory drive and water off the 3F/3FE for all the belts and pulleys to work like stock.

 

[middlecalf]

ANd honestly to keep me busy.

Ocean is that way ——->

Bring surf board, camera(s), fishing pole, snorkel, etc.

You sound like me, rather than doing things like fishing, hiking, making photos I’m chasing cows around like a half-baked cowboy wannabe .

Yeah, that wasn’t any help, was it?

 

[Roastchestnuts]

Ocean is that way ——->

Bring surf board, camera(s), fishing pole, snorkel, etc.

You sound like me, rather than doing things like fishing, hiking, making photos I’m chasing cows around like a half-baked cowboy wannabe .

Yeah, that wasn’t any help, was it?

Hahaha you are not wrong! I like tinkering on things and this just popped in my head the other day because I was thinking about my old 3fe fj80 and wondering about carberation on it. then that led into looking at 3fe blocks. then I thought it would be cool to build one with a 2f head (where the question came from). they seem to be easier to find than the 2f engines. - witch this all came from me thinking about seeing a fj55 with a blown engine for cheep.

 

[Roastchestnuts]

yes if it is an +85 head that would be a 3F. +85 2F head is the same as 3F. You'll want to use the accessory drive and water off the 3F/3FE for all the belts and pulleys to work like stock.

Thanks @cruisermatt this is the info I was searching for.

 

[cruisermatt]

Personally I would just run the 3FE fuel injection, it’s great for a 40/55. Super simple and reliable.

 

[Mark W]

The 3F block is shorter. Because of that I believe the reason why Toyota raised the RPM red line up 500 when the FJ62 started in the US 8/87.

But with the short stroke 3F block might be better than 2F on the pavement.

Actually the opposite is true. I am too lazy right not to type it all out yet again, but look at some of my posts in the 2FE threads. There is, IMHO, no reason at all to chose a 3F shortblock over a 2F. and some important reasons not to if performance is your goal.

Mark...

 

[Living in the Past]

Actually the opposite is true. I am too lazy right not to type it all out yet again, but look at some of my posts in the 2FE threads. There is, IMHO, no reason at all to chose a 3F shortblock over a 2F. and some important reasons not to if performance is your goal.

Mark...

Thew OP was thinking of doing this for cost not performance. The 3FE head and 2F block is popular. This leaves 3F blocks and 2F head in lower demand.

 

[Hugh Heifer]

This is useful tech as I have an 87 head and a 3FE short block just laying around.
@Roastchestnuts Did you tackle this?

 

[Roastchestnuts]

This is useful tech as I have an 87 head and a 3FE short block just laying around.
@Roastchestnuts Did you tackle this?

I didnt I was just curious. still rocking the 2f. I just wanted a cheep engine that I could build as a back up. Cheep and land cruiser dont seem to go together though.

 

[Hugh Heifer]

I didnt I was just curious. still rocking the 2f. I just wanted a cheep engine that I could build as a back up. Cheep and land cruiser dont seem to go together though.

I was thinking about giving it a go.
Hole in the 2F.

 

[Hugh Heifer]

While I very much respect @Mark W as his acumen for such things goes much farther back than mine but I like experiments and this could be one of those silly more money or time than sense ones. And to @Roastchestnuts : I hope you do not mind a thread hi-jack.

Back story - I received both of these engines from friends in trade. The 2F is an 87 from a US FJ60. It has a hole in the block (yeah I know - the head could be warped or cracked). It was a package deal with a car haul trailer. A sorta, "throw that pile of garbage in and you have deal." The 3FE is of unknown condition from a parts truck that was sitting at @jynx place. Traded for a bare 80 front axle and an old Craftsman tool box I did not need. Oh, and a weekend of silliness.

The 2F has a hole in the block (I believe from oil starvation) but it sat outside and the rockers pretty toasted. I am almost embarrassed to post pics. The rocker shaft and rear most springs are a a rusty mess due to how it was laying in the yard. The cam and lifters are rusted in place. I had to beat the pistons out as they were also mostly rusted in place. Strangely, the carb seems ok, the thermostat housing is in very good shape and the intake, exhaust and EGR all seem good. I have stripped it completely and the block will either be yard art or go off to recycle. Probably the crank as well but I have not decided. The bearing spun on the bade cylinder. I have not measured it and I would not be surprised if it was worthless. The pistons and rods may become desk clocks. As I was taking it apart and wondering why I was wasting another day, it occurred to me that even German tanks found sunken in swamps were occasionally restored and gotten to run.

The fuel injection on the 3FE is not complete and the wiring is all cut so I just do not think it is worth it to me to try to figure all that out. I have yet to pull the top or even the valve cover off the 3FE so maybe I am getting ahead of myself.

So that is a starting point to build a Franken-3F. I have never built an engine before and if I wreck this without it costing me too much other than time, well, you get the idea. (My mother, rest her soul, would say it keeps me off the streets, others might say my time is better spent elsewhere.)

Anyway, due to the water damage in the valvetrain attached to the 2F I went in to ToyoDiy.com to compare the part numbers of the stuff connected to the two different heads (2F v 3FE). Low and behold almost everything transfers over.
The part number exceptions are: Exhaust valves, exhaust valve retainers, exhaust valve springs, rocker support studs on which the valve cover attaches, the pushrods and lifters. This means that all the damaged garbage on the 2F head can go to the scrap yard and be replaced with stuff from the 3FE head which is no doubt in better condition (all with the above exceptions.)

The question will be what lifters and pushrods I need to use? I assume the 3FE lifters as they are seated in that engine but I do not know what the difference is in the pushrods. The 2F ones were an absolute rusty mess.

Any insight on the differences between the 2F pushrod 13781-61010 and the 3FE pushrod 13781-61020? @cruisermatt maybe?

On a final note, I have like six ongoing projects so this will not be happening quickly. If you know any of the boys over at the STLCA they will tell you I work on my projects at the speed of smell.

 

[cruisermatt]

Any insight on the differences between the 2F pushrod 13781-61010 and the 3FE pushrod 13781-61020?

Easy. The block height is different. 3FE pushrods are shorter.
Can I just sell you a good 2F short block for cheap?

 

[Hugh Heifer]

Easy. The block height is different. 3FE pushrods are shorter.
Can I just sell you a good 2F short block for cheap?

Thanks for the quick response Matt

I actually have a complete 2F sitting in the shop from a buddy doing some Coyote nonsense to his old 40 so he gave it to me.
I know all this is probably pretty foolish.

 

[Hugh Heifer]

Making progress. The 3FE has been stripped of the "E" part of the nomenclature and found its way to a new engine stand.
And today I received 5 gallons of Evapo-rust
When I said slow and silly, I meant it.