1B Diesel Engine Rebuild + Turbo (1 Viewer)

[OffRoad911]

Hi,
My 1984 BJ40 is currently being restored. I have upgraded the 4 speed gearbox and installed a 5 speed H55f with the correct 40's top plate. The engine rebuild commences this coming Sunday and I need to make a decision on adding a Turbo kit to the 1B engine.
I would love to hear from anyone who has mated a Turbo charger to a 1B diesel engine. Would like to learn of the pros and cons and what are the real benefits.
This is an image of my rebuilt and restored H55f.

 

[roma042987]

sorry no insight on turboing the B diesel the 3b responds to them quiet well. That is a good looking trans and tcase combo. Does that vacuum pot for the 4wd fit between the bj42 frame rails?

 

[gerg]

I've done it several times. Tune the egts to like 1000f max pre turbo as the B doesn't have piston squirters. Other than that it's alot like a 3B but do take the lower displacement into consideration when sizing. None of the B series pistons seem to fail but still good to be conservative.

 

[jim land]

Can you post a pic of the engine
I thought that all 84 came with 3b

 

[OffRoad911]

Can you post a pic of the engine
I thought that all 84 came with 3b

It's definately a B1 engine and it is a 1983 production vehicle. Models that were supplied to Asia probably had a mixture of specs.

 

[cruiserpilot]

I see a manual shift transfer case linkage. Why go vacuum? If the linkage is intact?

 

[MauricioR]

Do not go higher than 10PSI on your turbo, I will highly recommend you to use a Top Mount Intercooler (easier to install and work).
If you go higher than 10PSI, you will need to upgrade your exhaust, clutch and add a oil cooler, not sure how well the 1B pistons handle more than 10PSI.
I have been running 8PSI for 3 years with no issues.
Turbo on a B engine (1978 BJ40) (With Intercooler)

I used a CT12 turbo, if I were you I would use a CT20 which is smaller and helps alot on low RPMs which is exactly what this engine needs.

 

[roscoFJ73]

It's definately a B1 engine

I think its just a B engine. There is an 11B which is a direct injected engine found in Dynas and Toyotace. It would be on that aluminium plate under that gentlemans arm in the last pic or molded into the block.
You are right about the specs, the parts manual shows the B engine being used until at least 84 in GEN markets.

What condition is the body in?

DESTINATION:	GEN:	GENERAL COUNTRIES
ENGINE:	B:	3000CC DIESEL
GEAR SHIFT TYPE:	4F:	MTM, 4-SPEED FLOOR SHIFT
BUILDING CONDITION:	CBU:	COMPLETELY BUILT UNIT

Search Results
������������

VIN*	Model code	From	To	Frame		Characteristics
..	BJ40L-KC	08/1980 -	09/1984	BJ40		GEN	TP	LHD	B	4F	CBU	WORB	TPC
..	BJ40L-KCJ	08/1980 -	09/1982	BJ40		GEN	TP	LHD	B	4F	CBU	RB	TPC
..	BJ40LV-K	08/1980 -	09/1984	BJ40		GEN	VAN	LHD	B	4F	VLS	CBU	WORB
..	BJ40LV-KC	08/1980 -	09/1984	BJ40		GEN	VAN	LHD	B	4F	VKC	CBU	WORB
..	BJ40LV-KCJ	08/1980 -	09/1982	BJ40		GEN	VAN	LHD	B	4F	VKC	CBU	RB
..	BJ40LV-KJ	08/1980 -	09/1982	BJ40		GEN	VAN	LHD	B	4F	VLS	CBU	RB
..	BJ40R-KC	08/1980 -	09/1984	BJ40		GEN	TP	RHD	B	4F	CBU	WORB	TPC
..	BJ40R-KCJ	08/1980 -	09/1982	BJ40		GEN	TP	RHD	B	4F	CBU	RB	TPC
..	BJ40RV-K	08/1980 -	09/1984	BJ40		GEN	VAN	RHD	B	4F	VLS	CBU	WORB
..	BJ40RV-KC	08/1980 -	09/1984	BJ40		GEN	VAN	RHD	B	4F	VKC	CBU	WORB
..	BJ40RV-KCJ	08/1980 -	09/1982	BJ40		GEN	VAN	RHD	B	4F	VKC	CBU	RB
..	BJ40RV-KJ	08/1980 -	09/1982	BJ40		GEN	VAN	RHD	B	4F	VLS	CBU	RB

 

[OffRoad911]

I see a manual shift transfer case linkage. Why go vacuum? If the linkage is intact?

Sorry I don’t get your question. Not familiar with the tech language and certainly don’t understand what going vacuum means .

 

[OffRoad911]

I think its just a B engine. There is an 11B which is a direct injected engine found in Dynas and Toyotace. It would be on that aluminium plate under that gentlemans arm in the last pic or molded into the block.
You are right about the specs, the parts manual shows the B engine being used until at least 84 in GEN markets.

What condition is the body in?

DESTINATION:	GEN:	GENERAL COUNTRIES
ENGINE:	B:	3000CC DIESEL
GEAR SHIFT TYPE:	4F:	MTM, 4-SPEED FLOOR SHIFT
BUILDING CONDITION:	CBU:	COMPLETELY BUILT UNIT

Search Results
������������

VIN*	Model code	From	To	Frame		Characteristics
..	BJ40L-KC	08/1980 -	09/1984	BJ40		GEN	TP	LHD	B	4F	CBU	WORB	TPC
..	BJ40L-KCJ	08/1980 -	09/1982	BJ40		GEN	TP	LHD	B	4F	CBU	RB	TPC
..	BJ40LV-K	08/1980 -	09/1984	BJ40		GEN	VAN	LHD	B	4F	VLS	CBU	WORB
..	BJ40LV-KC	08/1980 -	09/1984	BJ40		GEN	VAN	LHD	B	4F	VKC	CBU	WORB
..	BJ40LV-KCJ	08/1980 -	09/1982	BJ40		GEN	VAN	LHD	B	4F	VKC	CBU	RB
..	BJ40LV-KJ	08/1980 -	09/1982	BJ40		GEN	VAN	LHD	B	4F	VLS	CBU	RB
..	BJ40R-KC	08/1980 -	09/1984	BJ40		GEN	TP	RHD	B	4F	CBU	WORB	TPC
..	BJ40R-KCJ	08/1980 -	09/1982	BJ40		GEN	TP	RHD	B	4F	CBU	RB	TPC
..	BJ40RV-K	08/1980 -	09/1984	BJ40		GEN	VAN	RHD	B	4F	VLS	CBU	WORB
..	BJ40RV-KC	08/1980 -	09/1984	BJ40		GEN	VAN	RHD	B	4F	VKC	CBU	WORB
..	BJ40RV-KCJ	08/1980 -	09/1982	BJ40		GEN	VAN	RHD	B	4F	VKC	CBU	RB
..	BJ40RV-KJ	08/1980 -	09/1982	BJ40		GEN	VAN	RHD	B	4F	VLS	CBU	RB

The body and chassis was in great condition but I have completely stripped everything, improved the chassis and realigned it. Body has been completely stripped, all minor rust spots have been repaired with new plate and converted soft top to a hard top body.

 

[OffRoad911]

Do not go higher than 10PSI on your turbo, I will highly recommend you to use a Top Mount Intercooler (easier to install and work).
If you go higher than 10PSI, you will need to upgrade your exhaust, clutch and add a oil cooler, not sure how well the 1B pistons handle more than 10PSI.
I have been running 8PSI for 3 years with no issues.
Turbo on a B engine (1978 BJ40) (With Intercooler)

I used a CT12 turbo, if I were you I would use a CT20 which is smaller and helps alot on low RPMs which is exactly what this engine needs.

Will speak to the mechanic tomorrow but so far from all the above comments it seems the turbo if not fitted with the correct output will in the long run affect the engine life. I am having the engine stripped and getting the blocked converted from B to B2 thereby adding another 200cc. I think I will leave adding the turbo kit for now and run the vehicle for a couple of years and then swap the complete engine for something newer. Thanks for your help.

 

[cruiserpilot]

Sorry I don’t get your question. Not familiar with the tech language and certainly don’t understand what going vacuum means .

In the picture of the rebuilt transmission transfer case, there appears to be a vacuum shifter which shifts from 2wd to 4wd.
Now I see in the picture with the original frame with engine installed with the transmission transfer case it is older style, manual shifter by the front driveshaft for shifting from 2wd to 4wd. Why did you rebuild it with the vacuum shifter attached? Is it not that original transfer case now? As also indicated, you might have trouble getting the transfer case to fit between the frame rails with the vacuum attachment as they are about 1”-2” wider and likely won’t fit.

 

[roscoFJ73]

Will speak to the mechanic tomorrow but so far from all the above comments it seems the turbo if not fitted with the correct output will in the long run affect the engine life

As long as you keep the EGT's below a certain temp you shouldnt have any problems.

 

[brownbear]

Literally any engine (within reason for a small engine) will love a turbo with a little pressure.

My 3B when I turbo'd it woke right up.

We are not really jamming boost into these, I don't feel an intercooler is worth it. Just run 7-10 PSI max and enjoy the benefits of lower EGT and an engine that breathes.

If I pushed greater than 10 PSI I would consider an intercooler, but I don't want higher boost as it's still a pre-cup engine.

 

[Jollopy41]

Will speak to the mechanic tomorrow but so far from all the above comments it seems the turbo if not fitted with the correct output will in the long run affect the engine life. I am having the engine stripped and getting the blocked converted from B to B2 thereby adding another 200cc. I think I will leave adding the turbo kit for now and run the vehicle for a couple of years and then swap the complete engine for something newer. Thanks for your help.

I think you mean from a B to 2B. I remember somebody from Mud posting the compatibility of interchangeable parts for a B, 2B and 3B engine. Currently speaking, I have a 2B engine on my 41. I'm pretty happy with it as a N/A diesel engine. But If I had the option of installing a Turbo, I would definitely go that route.

 

[Jollopy41]

Hi,
My 1984 BJ40 is currently being restored. I have upgraded the 4 speed gearbox and installed a 5 speed H55f with the correct 40's top plate. The engine rebuild commences this coming Sunday and I need to make a decision on adding a Turbo kit to the 1B engine.
I would love to hear from anyone who has mated a Turbo charger to a 1B diesel engine. Would like to learn of the pros and cons and what are the real benefits.
This is an image of my rebuilt and restored H55f.

View attachment 2008195

View attachment 2008196

Oh wow! Your h55a comes with a PTO system already in place. This is cool.

 

[RufusTheDufus]

In the picture of the rebuilt transmission transfer case, there appears to be a vacuum shifter which shifts from 2wd to 4wd.
Now I see in the picture with the original frame with engine installed with the transmission transfer case it is older style, manual shifter by the front driveshaft for shifting from 2wd to 4wd.

They aren't the same transmissions. The old one is a 4 speed and the rebuild is a 5.