13bt 24-12 convert

[Muddchucker]

Hi there wondering if anyone has done a 24v to 12v swap on a 13bt as im takin the 13bt out of my 70 series and putting it into my BJ42 the only problem i could guess would be with the diesel pump ?? And all the sensors
Cheers

 

[ozcrusier]

Should be plug and play on the engine and gearbox swap if your keen you could even swap the harness over but it's not needed the electrics are the easy part.

 

[John Galt]

As well as all the sensors to be changed there will be 'challenges' with a 12v starter and the glowscreen circuit on a 13B-T

 

[Muddchucker]

Cool yea iv got a 3b in the bj42 thats 12 volt so im gonna swap the alternater and starter onto the 13bt and i wanna chuck my 5 speed out of my 70 series into it as well it should all bolt up aye ??

 

[ozcrusier]

I have never done the swap but both engines have the same mounts so should be smooth sailing there but not sure with the 5 speed box you might have a problem with the chassis cross over brace best climb under with your tape and have a good look.

 

[Muddchucker]

Yea sweet thanks man

 

[CruiserBoy]

Hi Muddchucker, I've done this swap. I have the 13B-t red block and that is a strait plug and play on my 1981 BJ42 with stock 4 speed. All I had to do was swap my 3b starter and alternator over. I've added a 12v-24v converter to connect the VSV vacuum switch that shuts off the motor as my VSV is still 24v. Also you need to add a fuel return line back to the fuel tank. I haven't connected the glow screen yet, I will do that later. I've been driving it like this for more than a year without any issues. It takes a bit longer to start during the winter. I also have a 5 speed that I was to put in next year.

 

[OffRoad911]

Hi Muddchucker, I've done this swap. I have the 13B-t red block and that is a strait plug and play on my 1981 BJ42 with stock 4 speed. All I had to do was swap my 3b starter and alternator over. I've added a 12v-24v converter to connect the VSV vacuum switch that shuts off the motor as my VSV is still 24v. Also you need to add a fuel return line back to the fuel tank. I haven't connected the glow screen yet, I will do that later. I've been driving it like this for more than a year without any issues. It takes a bit longer to start during the winter. I also have a 5 speed that I was to put in next year.

Hi,
I have a BJ40 with a B1 Diesel engine and a H55f. I wish to swap my engine with the 13BT. My vehicle is currently 12v. What changes do I need to make to run it on 12v? Also will I too have starting problems in winter?

 

[cruiserpilot]

Hi,
I have a BJ40 with a B1 Diesel engine and a H55f. I wish to swap my engine with the 13BT. My vehicle is currently 12v. What changes do I need to make to run it on 12v? Also will I too have starting problems in winter?

Input shaft on transmission might be an issue. The 3B and 13BT have same input shaft. I don’t know about the B engine. Perhaps someone could chime in?