Good day gents. I'm new to this forum and I'm here to ask a question that has been asked before how ever I haven't seen a good answer to it.
Before anything, i am aware the sohc is a superior engine in many way and it would be better to fix the sohc rather then swap it for the ohv. I'm aware of all that. However I'm just looking for answers.
I have a 2001 mazda b4000 which in all accounts is a ranger with a mazda emblem and cosmetic. It's a 4x4 cab plus with the 5r55a automatic transmission. Rebuild the engines top end, new chains, guides and tensioner. Engine has done well until now. Guides snapped out of place and i need to re do the timing and replace the guides. I can fix it or swap it. But i want to make an informative decision before deciding what i do. So My question is, what would I need to do to swap in the ohv? What year ohv will I need? Will the current ecu/pcm work with the ohv engine? Will the sohc engine mount be compatible for the ohv engine? Would i need the ohv harness. Would the engine bolt up to the transmission, frame, exhaust etc. I love pushrod engines due to simplicity. And Fuel consumption isn't a factor I care too much about and nor does torque or power. I won't get into personal preferences. It's for information. Thank you for your answers in advance.

 

The SOHC is superior in just about every way, aside from the early timing issues (which it sounds like you ran into). You are absolutely right in that it would be better to fix the SOHC: It would be easier (also likely cheaper) and in the end you'd actually have a more reliable engine. Never mind how slow the OHV will feel after driving the SOHC. (The OHV has torque down low, yes, but it barely gets a Ranger out of its own way and there's no comparison on the highway.)

Having said all that, yes, you could do it. Search the forums for the examples and more details- there aren't many but its been done. Some of the Explorer guys did it back in the day too.
Transmission bolt patterns are the same and engine mounts are the same.
Exhaust is different (different heads and manifolds).
You'll need the OHV computer and engine wiring harness from donor. You'll also want the EVTM's for each year vehicle so you can compare the wiring for each.
OHV was used in Ranger from 98-2000 and would be easiest. The changeover year from OHV to SOHC was 2000, so that will likely have the least wiring differences, if there are any.

SO: Minor wiring differences... possible fuel pump not sure, and PATS could be an issue (bring all the PATS stuff from the donor... and read up on the differences between 2001 and your donor!).
Frankly, if you want an OHV, I'd sell the 2001 and buy a 98-2000 with the OHV!

Good luck,
am

 

Can you please tell me what PATS stand for? I have the dumbs and could not decipher.