15B into a BJ42. I'm doing it now!

[håvard]

I was planning to put a 1HDT in my 42, but for many reasons i will not go into in this thread i ended up with a 15B (real name 15BF). I excpect most of you know what engine im talking about, but for those who dont know. Its a 4.1 litre inline four, 16 valves, direct injection and a rotation diesel pump.

Not alot of info is avalable on these engines, and even less info about what fits and wont fit when it comes to transmission and clutches. Im gonna solve it in this thread.

I said im doing it now, thats partly true. I baught the engine yesterday, but i have an extra H55 transmission to do some testing. I wont put the engine in the car until late fall, but the main problem is fitting a transmission and clutch (atleast thats what most people think).

So i went to Denmark and baught one. Denmark- if you plan to go there, dont. there is nothing there to see (maybe if you are into big citys, but i aint). My engine is a 1999 model from a Dyna. 109K (kilometers)

Today i tried to mount the transmission and clutch. Good news!
Solved issues :

1. The stock bellhousing from a BJ42 fits.

2. The actuall clutch disc has the same amount of splines as my stock BJ42 disc. Im not saying they are the same discs, but the 15B clutch disk enters my BJ42 21 splines. By the way. the 15B disc is 275mm, not 300mm as many others say it is. But there may be other configurations out there, i dont know.

3. I also tried to mount the transmission and bellhousing together. Everything fits perfectly, but there is two minor issues..

Issues

1. The plate between the bellhousing and engine does not fit with the starter. To solve this you can either modify the plate, or just use the one from your stock B or 3B engine. Problem solved.

2. The pressure plate is a bit bigger, not much byt slightly bigger. It builds a little more outwards towards the bellhousing. Tomorrow (if im not hang over) ill "massage" the pressure plate and bellhousing with a grinder. i Think that will do the trick. The last solution here is to try a bellhousing from a 70 series cruiser. A friend of mine has a 70 series housing i can try, but first ill try some grinding.


Other

Ill also test the clutch fork and make sure the clutch engages and disengages properly pretty soon.

There are some space issuies because of the integrated vacuum and powersteering pumps, but i wont know that before i start to put the engine in the car.

Ill keep you posted and it is my intention to update this thread so that other people can do the same. There has been some threads about 15B but i dont think no one of them topics has been solved.

Here is some evidence so far


Untitled by dieseldragon, on Flickr


15B (F) Engine in BJ42 by dieseldragon, on Flickr


15B (F) Engine in BJ42 by dieseldragon, on Flickr


15B (F) Engine in BJ42 by dieseldragon, on Flickr

 

[lowenbrau]

Cool project.

Did you try to stuff the starter into the bellhousing? I suspect you'll have interference issues with the injector pump. A later model aluminum bellhousing and would likely work with the original tin plate and starter that originally came on that motor.

Keep updating this thread. I love this stuff.

 

[håvard]

Cool project.

Did you try to stuff the starter into the bellhousing? I suspect you'll have interference issues with the injector pump. A later model aluminum bellhousing and would likely work with the original tin plate and starter that originally came on that motor.

Keep updating this thread. I love this stuff.

The plate ans starter that came with the 15B will not fit (as i mentioned). But you can use the stock 3B plate and starter instead, then everything fits. And yes as you say and i mentioned. If i gett another bellhousing from a 70 series (aluminum) i suspect it will fit. But ill take the easiest way since i have a stock 3B plate and starter.

 

[Tapage]

see turbo in your future ..

 

[håvard]

see turbo in your future ..

Of course I have a turboed 3B in my car now, ill put a turbo on the 15 also, but i wan to try it without first, just to see how it works. i actually wanted a non turbo engine because of the compression ratio. I do alot of offroading and i want that monster torque from 600RPM (im not talking about peak torque). Even the 3B is superior to many other engines when it comes to low low RPM. I wheel with alot of Defenders, Jeeps and Nissan Patrols and no one beats the B engines in low end torque.

 

[wongtsenhin]

From my knowledge, the oil pan doesn't not fit into 40 series. Must be from the cruiser series, not dyna truck. Good try! We have heaps of 40 series with this engine mounted into their cruiser. Keep us dated!

 

[crushers]

subscribed

 

[wongtsenhin]

15b into 40 series

Here is a few sample photos

 

[Lost]

git'r done!

good luck

 

[Volcano cruiser]

I wanted to do this swap but couldn´t find the engine in my region. I wish you luck. Subscribed.

 

[Dougal]

Subscribing.

BTW you're not the first to say that about Denmark. But they make Lego so it can't be all bad. Nice hilux, 1KZ or 1KD?

 

[håvard]

The hilux is a 2.5 D4D engine, im not sure what the real name of the engine is. Its a daily driver, i dont even change the eninge oil myself The HiLux is chipped- its an awesome DD

I think ill update my original post as this project goes on, so all the info is in one place. I know alot of people have done this engine swap before, especially in Malaysia, but the info is no out there (atleast not in english), thats why i do this thread.

a 15B engine aint impossible to get hold of. The company i baught the engine from has sold some 15 and he also had two 14B engines when i was there.

Im so extremely curious about how this engine performs, even without a turbo. I dont think ill get that kick i would from the 1HDT, and it certainly will not rev as much as the HDT. But for offroading i think and hope it will be the s*** And some wheelspin on dirt roads would be nice

Now its breakfast time, and then ill do some grinding on the pressure plate and bellhousing. ill keep you posted!

 

[wongtsenhin]

The hilux is a 2.5 D4D engine, im not sure what the real name of the engine is. Its a daily driver, i dont even change the eninge oil myself The HiLux is chipped- its an awesome DD

I think ill update my original post as this project goes on, so all the info is in one place. I know alot of people have done this engine swap before, especially in Malaysia, but the info is no out there (atleast not in english), thats why i do this thread.

a 15B engine aint impossible to get hold of. The company i baught the engine from has sold some 15 and he also had two 14B engines when i was there.

Im so extremely curious about how this engine performs, even without a turbo. I dont think ill get that kick i would from the 1HDT, and it certainly will not rev as much as the HDT. But for offroading i think and hope it will be the **** And some wheelspin on dirt roads would be nice

Now its breakfast time, and then ill do some grinding on the pressure plate and bellhousing. ill keep you posted!

2.5 D4D commonrail engine is 2KD.
15B hp is not behind 1HDT if properly tuned. This engine performs far more than you expected in all the Toyota diesel engine. Is lighten than 1HD and performed well when going for competition. Just kind of bit noise than 1HD.

 

[Falco80]

Cool conversion - subscribed!
I'd love to get my hands on a 15B-FT sometime in the future....

 

[crushers]

my understanding:
HDT max rpm (factory) is 4700
all B series engines max rpm (factory settings) is 4200

if that is the case a simple turn of the screw and you are sitting at the 4700 but, seriously, how often will you rev either out to the max RPM?

i would LOVE to take the 15B(T) for a spin, i suspect a LOT of torque hidden inside that puppy.

 

[håvard]

my understanding:
HDT max rpm (factory) is 4700
all B series engines max rpm (factory settings) is 4200

if that is the case a simple turn of the screw and you are sitting at the 4700 but, seriously, how often will you rev either out to the max RPM?

i would LOVE to take the 15B(T) for a spin, i suspect a LOT of torque hidden inside that puppy.

Max and min values is one thing. I meant real world throttle response. I have driven B engines for many many years- the inline 6es generally have a much more responsive feel from 1200-3000 RPM. But hey, neither you or me know this yet. Time will show

Ill try to not do any guestimations in this thread. Thats is what bugs me most about the internet- there is alot of "believing" about what fits and wont. Im not takling about any specific users here, just in general. And i certainly aint talking about you Crushers - i thank you for all your input.

We have a Norwegian saying "You can do your believing in church". Ill only post reallife experience and facts about the conversion here. (i think Scandinavians is the least religious people on this planet)

 

[crushers]

you are right, i have zero experience with the 15B (subscribed for a reason).
i do have decent experience with the 1HZ, 1PZ and the generic B, 2B, 3B and 13BT. i have found the 1HZ to have a smooth torque curve that "feels" good over a more broader range but the 3B+T is wicked and the 13BT has very quick throttle response, tons of snap but not my favorite for off roading. i think the 15B would be an engine i would be very interested in swapping into my FJ75.

"you can do your believing in church" ... love it, sig line material right there.

what vehicles did the 15B/15BT come equiped in industrial vehicles? i "might" be able to source a used one locally ...

 

[wongtsenhin]

you are right, i have zero experience with the 15B (subscribed for a reason).
i do have decent experience with the 1HZ, 1PZ and the generic B, 2B, 3B and 13BT. i have found the 1HZ to have a smooth torque curve that "feels" good over a more broader range but the 3B+T is wicked and the 13BT has very quick throttle response, tons of snap but not my favorite for off roading. i think the 15B would be an engine i would be very interested in swapping into my FJ75.

"you can do your believing in church" ... love it, sig line material right there.

what vehicles did the 15B/15BT come equiped in industrial vehicles? i "might" be able to source a used one locally ...

Mega cruiser or dyna truck.
15B is a very responsive engine.

 

[håvard]

Ok. More updates.
Today i grinded the pressure disc, and i also did some minor adjustments to the bellhousing, just to be on the safe side of clearance.

At first i tried to remove about 2mm on the pressure plate, but that was not enough. I trimmed of about 5mm on the most critical spot. I cant se any reason why this should make the pressure plate weaker, so im pretty confident that removing some steel is more than strong enough.

Anyway, now the clutch, bellhousing and gearbox mounts perfectly. The "hard part" is done. Next, i have to get hold of the clutch release fork, and test that disengaging the clutch works as it should. A friend of mine has a fork, so ill probably test that tomorrow.

A couple of pics of the engine (yes i will prettify it)


15B-F into BJ42 by dieseldragon, on Flickr


15B-F into BJ42 by dieseldragon, on Flickr


15B-F into BJ42 by dieseldragon, on Flickr


15B-F into BJ42 by dieseldragon, on Flickr

Here is the problem, the pressure disc interferes with the bellhousing (before grinding)


15B-F into BJ42 by dieseldragon, on Flickr


15B-F into BJ42 by dieseldragon, on Flickr

I did a couple of try and fit before i ended up with a total of about 5mm trimming. I used tape to check for contact


15B-F into BJ42 by dieseldragon, on Flickr

The grinded pressureplate

15B-F into BJ42 by dieseldragon, on Flickr


15B-F into BJ42 by dieseldragon, on Flickr


15B-F into BJ42 by dieseldragon, on Flickr

Its hard to see, but if you look closely i grinded a little of two of the "fins" inside the bellhousing, it might not be necessary, but i wanted to be on the safe side.

15B-F into BJ42 by dieseldragon, on Flickr

 

[fat wagon]

very l conversion I alway thought it wouldn't be too hard to put a 15bft in a cruiser. here in australia we get the 15bfte engines in dyna trucks and coaster buses some early dynas had 15bf with mechanical pumps but all the coasters have either a 1hz mechanical or a 15bfte electronic pushes a coaster 10 times better than a 1hz

Cheers

Fat wagon