15b-ft or not to be? (1 Viewer)

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A grid heater, of course, makes perfect sense. In post #55 pic 3 the non turbo 15B-F has a butterfly valve, I wonder if it has been relocated behind the grid heater in the turbo version, there are some odd bulges. I guess there might be a MAF sensor in there too being an ECU controlled injector pump. I would love to get my hands on the manual.

Today I found a russian manual for the mega cruiser on line. The pictures show what looked like a gear driven vacuum pump, which I may just swap for an air compressor. I have never understood why light diesel vehicles use vacuum when compressed air or powersteering pressure are much better working fluids for boosting brakes and moving levers.

Comming back to the discusion earlier in the thread about flywheels, clutches and bell housings; am I corect in understanding that the 13B-T and 14B-T had 275mm clutches and a bell housing that mates with the H55 gearbox without modifications and the 15B-F and 15B-FTE had larger flywheels and bellhousings for a 300mm clutch? Does anyone know if a later cruiser gearbox mounts on this larger belhousing, eg H15O0 or H151. I know the bolt patern changed after the H55. I am quite happy to raid the entire Yota parts bin to build my ultimate 40 series.

One more for tonight; does anyone know what inline injector pump was used on turbo B series, I presume it was a denso. It looks like the 14B-T was supplied with both inline and rotary pumps for different applications and I have seen a photo of an inline pump on a 15B-FT. Is there a good website for information on denso pumps specs in english?

I promise I'll take lots of photos once I get my hands on one of these.

Dan
 
I have never understood why light diesel vehicles use vacuum when compressed air or powersteering pressure are much better working fluids for boosting brakes and moving levers.

I think it's the moisture issue. If you compress air it drops moisture out which has to be drained somewhere in the system. But with vacuum systems you can still get 12psi or so pressure difference with a simpler system.

That and vacuum accessories already existed from petrol engine versions.
 
There is no bell housing to suit a combo of 15B to H151/0:hmm:

That's a shame, having driven both the H55 and H151 I prefered the H151 and the later transfer cases had slightly lower lo range. So I guess the options are;

a) use the bellhousing from a 14B with a 275mm clutch flywheel

b) use the bellhousing from a 14B and grind out the internal web to accomodate the 300mm clutch flywheel (can anyone post a photo of how much needs to be ground away).

c) some form of custom job that uses the front half of the split belhousing off theBB50 coaster and mounts either the H55 or H151 gearbox.

d) the 'outside the box' solution; keep the 6 speed from the BB50 coaster and look at modifying the rear and tailshaft to mount a transfer case. So far all I can find is '6 speed manual' and the ratios (2 overdrives) but no name or part number. Not sure how realistic this option is, would depend greatly on the casting of the tail end having enough metal in the right places to mount a transfer case, plenty of people find ways to mate V8 plus automatic transmissions in to transfer cases so there's hope. And it could open up the posibility of using the only part Landrover ever made that was stronger than Toyota, the LT230 transfer case.
 
The most likely suspect for the 6 speed transmission in the BB50 coaster is the Aisin AH16, can anyone confirm this?
 
Dan

There is no bell housing to suit a combo of 15B to H151/0:hmm:

yes there is. The 15B is used with a non 4x version of the H15X trans. Just as there was a non 4x version of the H5x trans.

Ive researched this a bit and plan to use an H151 I have. with a 15B-FT that I have had for a while. It will either go into an 80 series or an Fj55 I have.
 
Hi Lynchmob

That's good news. Do you know what vehicle the 15B + H5x combo was used in or what size clutch disc it used? I'm guessing it could be the same bellhousing used on the 14B with a 275mm clutch but I'd love to be wrong about that. Mr Yota must have thought the 15B-FTE had too much torque for the old clutch because the BB50 Coaster and Dyna/Dutros in Australia all got 300mm clutches (as far as I can tell).

What did your 15B-FT come out of? Unfortunately they don't seem to be as common as the electronically controlled FTE. I've read that the later FTE's got some wider bearings but are otherwise identical to the FT's except for the injector pump, so I figure I can 'downgrade' an FTE if I can’t find an FT. I'm happy to give up a bit of power and torque to make it field serviceable. What injector pump is on the FT, rotary or inline, they seem to have used both? Is it a nippon-denso, does it have any reference numbers on it?

Cheers

Dan
 
Sorry, what I wrote was not that clear

The early 3B etc versions of dyna used an H50 which is essentially a 2 wheel drive version of the H55.

For the 15B (at least the one I have) has a 300mm clutch and a two piece bellhousing like the UZJ engine. I believe its from a heavy Dyna 200 series and these use an H153 which is a 2 wheel drive version of the H15x. The main case of the trans appears to be the same so bellhousings should swap between applications. The main unknown for my situation is the input shaft of the trans.

Ive not researched H55 compatibility to the 15B at all. I dont have the engine here now so Im not help with numbers etc. Mine has a rotary pump.
 
That's is a good info!
Any links or pictures to what you have done to your research?
H55f will go perfect 15B with factory bellhousing.

yes there is. The 15B is used with a non 4x version of the H15X trans. Just as there was a non 4x version of the H5x trans.

Ive researched this a bit and plan to use an H151 I have. with a 15B-FT that I have had for a while. It will either go into an 80 series or an Fj55 I have.
 
Specialist manufacturer of manual transmissions, Aisin AI
List of Aisin transmissions - Wikipedia, the free encyclopedia
TLC FAQ - 8.1 Transmission & transfer Case Ratios (All :1)

OK, a lot of assumptions and guess work from the above links. But it looks like Aisin and Toyota transmission names tie up;

Aisin AH5 = Toyota H150/H151
Aisin AR5 = Toyota R150/R151

both of which were used in cruisers and have single piece bell housings. The H55 was probably a Toyota in house job.

Transmissions that may have been mated to the 15B-FT/FTE are the AM5, AM15 & AH15/16. From the photos the AM5 has a one piece bell housing and the others have split bell housings and it looks like the AM5 was replaced by the AM15 in 2003. The AM15 looks quite a different shape to the others. So from looking at the little photos it looks like the AH15/16 and the AH5 are the closest match to investigate either bell housings or mounting the transfer case on the tail end.

As I said at the beginning, lots of assumptions and guess work and I may be completely wrong, but I'm having difficulty finding any hard facts.

For my old BMW I have a dodgy DVD off ebay with all the factory service manuals, parts catalogues and wiring diagrams for every car they made, is there something similar for toyota? I looked at the TIS subscription but it's only for North American vehicles produced after 1990. Does the Electronic Parts Catalogue include commercial vehicles like Coaster and Dyna?

Can anyone identify the model of inline injector pump on the 15B-FT in post #117, or which vehicles it came in. Past bad experiences make me wary of rotary pumps.

It looks like the FTE is almost identical internally (I read wider bearings somewhere, but can't find it again) but a lot of the bolt-ons (manifolds, turbo, flywheels, etc) were different. For long term parts availability in Australia, I am thinking it would be better to 'downgrade' an FTE to a mechanical pump rather than use the older, less common factory FT model.
 
Specialist manufacturer of manual transmissions, Aisin AI
List of Aisin transmissions - Wikipedia, the free encyclopedia
TLC FAQ - 8.1 Transmission & transfer Case Ratios (All :1)

OK, a lot of assumptions and guess work from the above links. But it looks like Aisin and Toyota transmission names tie up;

Aisin AH5 = Toyota H150/H151
Aisin AR5 = Toyota R150/R151

both of which were used in cruisers and have single piece bell housings. The H55 was probably a Toyota in house job.

Transmissions that may have been mated to the 15B-FT/FTE are the AM5, AM15 & AH15/16. From the photos the AM5 has a one piece bell housing and the others have split bell housings and it looks like the AM5 was replaced by the AM15 in 2003. The AM15 looks quite a different shape to the others. So from looking at the little photos it looks like the AH15/16 and the AH5 are the closest match to investigate either bell housings or mounting the transfer case on the tail end.

As I said at the beginning, lots of assumptions and guess work and I may be completely wrong, but I'm having difficulty finding any hard facts.

For my old BMW I have a dodgy DVD off ebay with all the factory service manuals, parts catalogues and wiring diagrams for every car they made, is there something similar for toyota? I looked at the TIS subscription but it's only for North American vehicles produced after 1990. Does the Electronic Parts Catalogue include commercial vehicles like Coaster and Dyna?

Can anyone identify the model of inline injector pump on the 15B-FT in post #117, or which vehicles it came in. Past bad experiences make me wary of rotary pumps.

It looks like the FTE is almost identical internally (I read wider bearings somewhere, but can't find it again) but a lot of the bolt-ons (manifolds, turbo, flywheels, etc) were different. For long term parts availability in Australia, I am thinking it would be better to 'downgrade' an FTE to a mechanical pump rather than use the older, less common factory FT model.

In terms of parts and diagrams I would look hard at :
http://www.toyodiy.com

There are also threads etc out there on the various sources for the EPC and FSMs that cover the 15B and all of it's variants in theevent that you don't alread have one.

I'm a little confused on your mention above that for parts availability in Australia you want to go with a 15B FT instead of a 15B-FTE. In all my months of trying to hunt down a 15B, Australia had at least one of each version available as used engines and the wreckers there had most of the major parts. I never actually found a source for these engines that would have been as easy as Australia. I actually didn't go with one because of the cost to ship it to my location back then. Maybe I misunderstood.:confused:
 
Finally, i am doing the starting tests on the 15B-FT.

The starting engine is runing good and the flywheel is spining well.

The Vacuum system is runing good, and also the intake air warmer

But i am runing problems with the diesel injection bomb!

I Can not see diesel in the diesel injection pipes, althougt it was bleeded on the fuel filter.

Another thing is that diesel is runing on the diesel injection return pipe.

Can anyone help me finding the problem?

YouTube - 15B-FT Starting Test 1

YouTube - 15B-FT Starting Test 2

YouTube - 15B-FT Starting Test 3





15B's normally starts on the first cylinder when fuel is injected. Sounds like there's no fuel going into the cylinder chamber. You need to constantly supply 12V (or 24V, depending on the variant of your engine) to the solenoid on the fuel pump itself to open the valve within.
Though this is an old thread and probably you've managed to sort the starting problem. Just in case there are some who's still wondering.
 
This is what I have and this is what I want

I have a 78 BJ40 24v with a "B" engine, 4speed (H41 I think) all stock.
Shortly, I will get a 15BE (16valve) (paid for) shipped from Manila.
Here's the questions
1. Can I use the bell housing for the "B" ?
2. If so will grinding the inside allow for the flywheel clearance?
3. If all this is a bust what is the best way to accomplish the swap?
I would like to use the H41 if possible as I have no need of a 5 speed. I would like to go with the 12" flywheel and 300 mm clutch if possible as I will use the truck in the mountains of the Philippines. I have the abilty to make adapters if needed as there are many mom and pop machine shops here. Drive shaft (propeller shaft) length is not a problem as I can cut or lengthen at will. The 15BE I got at a good price, its from Japan and does not have the transmission with it (hence the good price) and at this moment I do not know if the flywheel and pressure plate are with it. From this forum I know I can use a 300mm Isuzu clutch plate but am having trouble figuring out the rest. Any help would be greatly appreciated.
Lee
 
It is possible ti use H41 4 speed gearbox directly to engine block(remove aluminium clutch housing and flywheel from 15B_FT), bud mast to change flywheel. Mast to use flywheel from 13BT(6 bolt) and 275mm clutch. Original B or 3B Flywheel is with 5 bolts and slowest diameter clutch.
 
It is possible ti use H41 4 speed gearbox directly to engine block(remove aluminium clutch housing and flywheel from 15B_FT), bud mast to change flywheel. Mast to use flywheel from 13BT(6 bolt) and 275mm clutch. Original B or 3B Flywheel is with 5 bolts and slowest diameter clutch.


Is this what you mean?

It is possible to use H41 4 speed gearbox directly to engine block(remove alloy clutch housing (bellhousing) and flywheel from 15B_FT), but must change flywheel. And do I have to use a flywheel from 13BT(6 bolt) and 275mm clutch?
Original B or 3B Flywheel is with 5 bolts and smallest diameter clutch?

Ive heard of other owners using the 3B bellhousing with the larger clutch. But they had to grind off some small parts on the inside to get it to fit.
 
Know this is an old thread to revive but can someone please help me about the torque and horsepower figures of 14BT engine? No info could found, only 14B specs are available.
 
Know this is an old thread to revive but can someone please help me about the torque and horsepower figures of 14BT engine? No info could found, only 14B specs are available.
Based on the other B series NA vs turbo I'd expect 15-20% power increase over the NA 14B. I doubt you'll find the correct published figure for the application your engine was removed from, but perhaps you could try asking someone fluent in Japanese to broaden your search?
 

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