what 2B engine do I have?

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So when EXACTLY did B-series engines change their injection timing from 10 degrees BTDC to 14 degrees BTDC?

The August 1980 B-series Engine Repair Manual (pub # 36047) applies to August 1980 production models of BJ40, 42, 43, 45, 46 and 60 cruisers and it clearly states 14 degrees:

B2B3B14degrees.webp

While the 1977 B/2B Engine Repair Manual (pub # 98260) clearly states 10 degrees:

B2B10degrees.webp

But I can narrow it down further because my July 1979 BJ40 left the factory with a sticker on its valve cover saying 10 degrees BTDC:

DecalOriginal3.webp

So the change from 10 to 14 must have occurred between July 1979 and August 1980.

Can anyone narrow it down further?

:beer:
B2B3B14degrees.webp
B2B10degrees.webp
DecalOriginal3.webp
 
Folkert said:
are you sure about the 46? since that model is 1982-1984... would be interesting if that one was mentioned already in 8/1980.. ;)
Click to expand...

You can read it here yourself Folkert ...

Definitely includes the BJ46 model in the Aug 1980 engine manual:

Foreword.webp

:meh:

PS. However mine is the 4th edition printed in Feb 1982:

PrintDate.webp
Foreword.webp
PrintDate.webp
 
I was going to say that... they edited the manuals when they were using the same technology but the models changed. That is why some people have a different electrical section in their body and chassis manuals. Ones I have seen with the 40 stuff are pretty rare while the 60 series stuff is very prevalent here in the states.
 
Actually I'd hazard a guess that the change in injection timing (10 degrees to 14 degrees) occurred EXACTLY when the 3B engine was introduced (which coincided with the publication of the new B-series engine manual ........ that is, the publication of 36047FSM to replace 98260FSM).

So my guess is that August 1980 was the introduction date for 14 degree injection timing for B and 2B engines while the 3B engine never had anything else other than 14 degree timing. (Prior to this date, I believe the B and 2B engines had 10 degree timing.)


And.................:hhmm:

This all really takes us back to post #9 of yours Folkert where you said this ....

Folkert said:
hi daryl, thanks for the very usefull info,
in my FSM of 1977 it says 10 degrees BTDC for a 2B.. so that must indicate the change of timing setting to 14 degrees BTDC was before august 1980 or at least from aug 1980 on...
Click to expand...

So we probably should have ended the thread there at that post ...


.... Still ...... continuing it has kept myself and others amused for a good time now. :D

And I often take a long time to be convinced about things too.
 
Just to confirm the August 1980 change for the 2B; I found the following in the EPC.

There are two different valve cover stickers (plate, engine caution & engine name) for the 2B:

11293‑57020: 2/1979 to 6/1980 for BJ41

11293‑57030: 8/1980 to 9/1982 for BJ41

Unfortunately, the EPC illustration does not show the details on the sticker but it does confirm a change in the sticker on 8/1980, which appears to correspond with a change in the timing.

My 2B was manufactured on 6/1981. While the valve cover sticker is gone, there is a data sticker on the hood that says 14 degrees for the timing; in line with the post 8/80 change.
 
great info!!! thanks... unfortunately I never received the 2B decals from cruiserparts.net supplied by shane...

shane can you help me out with this one..?. cruiserparts.net does not reply to my emails anymore, already ordered these decals somewhere end of august..

Scopedog said:
Just to confirm the August 1980 change for the 2B; I found the following in the EPC.

There are two different valve cover stickers (plate, engine caution & engine name) for the 2B:

11293‑57020: 2/1979 to 6/1980 for BJ41

11293‑57030: 8/1980 to 9/1982 for BJ41

Unfortunately, the EPC illustration does not show the details on the sticker but it does confirm a change in the sticker on 8/1980, which appears to correspond with a change in the timing.

My 2B was manufactured on 6/1981. While the valve cover sticker is gone, there is a data sticker on the hood that says 14 degrees for the timing; in line with the post 8/80 change.
Click to expand...
 
I sent you the full size photo of the sticker. I also sent you a photo of the sticker below. On my vehicle, it is located on the the hood next to the other sticker, above the master cylinder. Looks like it pertains to the brake system as it mentions DOT3.
IMG_0068a.webp
 
Ha Ha, sorry about the dirt.

The sticker background is silver, similar to the color of the data plate on the firewall but they are stickers and not a metal plate.
 
Not that I don't agree with everyone's research, but is there any way to know if your truck is timed correctly? I have never set the timing so I am still not sure what's involved.

I am saying this since Toyota is known for having mixed parts over the changeover in designs and that means that there might be some 2Bs that need the 10deg even after 8/80.
 
Just to further validate what was already determined here, I found the same sticker on my hood that Scopedog did, and the 14 is barely visible below the RPM specification. BTDC is also barely visible to the right of the 14.

06d81101-9ccb-4387-aaf1-f067597d57c6_zps9492ae8b.jpg


My BJ41 is a 1981 model that was produced in 12/80. Narrows the gap a little bit. The valve cover sticker is not present any longer.

lostmarbles said:
You can read it here yourself Folkert ...

Definitely includes the BJ46 model in the Aug 1980 engine manual:

View attachment 554758

:meh:

PS. However mine is the 4th edition printed in Feb 1982:

View attachment 554761
View attachment 554758View attachment 554761
Click to expand...

I wonder why they never mentioned BJ41 in any of the FSM's that are supposedly good for the 2B engine?
 
Last edited:
thanks wes!! this indeed validates our theory!

the bj41 (and 44) are never mentioned in English FSM's since they are JDM only, so only appear in japanese manuals. The bj46 was also sold in other countries and the 2B engine appeared in other vehicles too (like coaster) and where also available in other countries, so data about these we do see in english FSM.







Wes said:
Just to further validate what was already determined here, I found the same sticker on my hood that Scopedog did, and the 14 is barely visible below the RPM specification. BTDC is also barely visible to the right of the 14.

06d81101-9ccb-4387-aaf1-f067597d57c6_zps9492ae8b.jpg


My BJ41 is a 1981 model that was produced in 12/80. Narrows the gap a little bit. The valve cover is not present any longer.



I wonder why they never mentioned BJ41 in any of the FSM's that are supposedly good for the 2B engine?
Click to expand...
 
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