4JB1T Swap

[Airplanedoc]

I’m wanting to put an Isuzu 4JB1T in my S10 which currently has a C223 with a T5, I’m hoping to find someone who has done this before or has some insight on what it would take any information would be appreciated

[Duck]

I'm not sure but I think The C223 and the 4jb1 have the same bolt pattern on the bell housing

[Airplanedoc]

That’s what I’ve been told, I’m not sure about the oil pan, engine mounts, flywheel and clutch. I haven’t purchased the 4JB1T yet so I can’t compare them, I want to have an idea of what it’s going to take before I purchase it

[gruff54]

I'm not too familiar with the C223 or diesel S-10's. Is the starter on the driver's side? That's the main problem swapping it in to 88+ Isuzu gas trucks, which have the starter on the passenger side. Means you have to have the diesel trans to go with the 4jb1. Also, common opinion is that the MSG may be a little weak for the 4jb1. But don't S-10's use a different tranny than the Isuzu's? Guess I really can't help regarding an S-10 swap. I'd get in touch with Jerry.

Mike

[JoeIsuzu]

He's trying to figure out if his T-5 with its C223 bolt pattern will bolt up to the 4JB1-T. I think so, and it should be plenty strong. But Jerry should know for sure.

Jack

[Airplanedoc]

Jerry tells me the transmission should bolt to it, he thinks the pan will have to be modified he also tells me someone has done the swap before that’s why I’m reaching out to see if I can get some feedback

[Duck]

I do know the flywheel on the c223 has 6 bolts and on the 4jb1 has 8 bolts.

[Airplanedoc]

Does anyone know if the pressure plate off my S10 will work on the 4JB1T flywheel?

[arrowmntdiesel]

Does anyone know if the pressure plate off my S10 will work on the 4JB1T flywheel?

I was told by Mr JLemond to find myself a 2.6L gas with a manual transmission and to use the flywheel from the 2.6L on my 3.1L TD and that will get me to a very common and easy to find clutch kit when needed in the 2.6 kit. I cannot confirm that this worked because I still haven't needed a clutch in the 3.1L diesel yet. I did get the flywheel though.

Mark

[gruff54]

Mark, re: the 2.6 gas flywheel and clutch. In addition to having a more available clutch, the lighter flywheel allows quicker revving, right? Any problem with the clutch slipping?

Mike

[arrowmntdiesel]

Mike,

Sorry, I re-read my own post and I did not make it clear. I have not installed the flywheel or clutch yet, due to not needing it yet. I am still running the clutch that came with the 3.1 engine. What is that 4JG1-T? So I really can't answer your question.

Mark

[gruff54]

Mike,
Sorry, I re-read my own post and I did not make it clear. I have not installed the flywheel or clutch yet, due to not needing it yet. I am still running the clutch that came with the 3.1 engine. What is that 4JG1-T? So I really can't answer your question.
Mark

Mark,
I re-read it also and I just assumed you'd replaced it. I've heard Jerry say you could use the 2.6 flywheel/clutch on the 2.8 4JB1-T. I've yet to complete my own swap, but I had the original flywheel resurfaced and the clutch rebuilt. While the lighter flywheel make make for a better road vehicle, I think a heavier flywheel would be better suited to my needs.

Apologies to Airplanedoc for the hijack as this info doesn't help to answer his question.

Mike

[Airplanedoc]

Mike,

No worries, did I understand correctly you’re doing a 4JB1T swap?

Conrad

[joeshmoe44883]

I can confirm the c223 and 4jb1 will bolt to the same transmission. Also, the 2.6 clutch will bolt up to the 4jb1t flywheel, just enlarge the dowel pin holes in the pressure plate. I did this, i bought a centerforce dual friction clutch for the 2.6 and it fits perfect onto the 4jb1t after enlarging the dowel pin holes.

[gruff54]

Mike,
No worries, did I understand correctly you’re doing a 4JB1T swap?
Conrad

Yep, been trying to find the time to swap a 4JB1-T into an '88-'91 Trooper for way too long.

Mike