Hi everyone, has anyone swapped a engine out of an 89 to a 92? If so what problems did you run into?

 

Well in sure we'll be adding alot to this post as in currently swapping a 91 into a 93.

 

That should be a lot easier. The wiring should all be the same especially if you're going to and from the same transmission. The main changes to these trucks were between 89-90.5. I all ready have mine swapped and driving but i'm running into all kinds of electrical gremlins most stuff just isn't working. The weirdest part is sometimes they will work intermittently.

 

I think that's 89 to 91.5.

 

Yeah, I'm going from a non ic truck with no computer to an intercooled truck with computer. I plan on running the intercooler on this motor that i picked up with my ve pump a while back

 

I might be able to shed some light for ya. I swapped a 90 Non I/C motor into a 92 RC and used all 1992 harness's to use a PCM for the gauges and a factory tach. I believe I have some of the swapped parts shown in the build thread.

Very subtle differences. You need to swap a 1992 damper, crank sensor, and intake plate for air temp sensor. The I/P's are the same EXCEPT for the KSB's. The non I/C has its wax pallet inside the KSB while the I/C versions use an external. That's what controls timing in the pump depending on temperature. I simply ran a jumper wire down from the FSS to power it.

 

Very good info sir, thank you

 

I have to correct a couple small things....the IP's are a little different. There is the KSB difference as mentioned, but the delivery valve housings are longer on a Non-IC motor, compared to the IC units...so the injector lines will need to be swapped as well. I do not believe the Non-IC injector lines will clear the IC motor intake plate and the associated hardware. Also internally the re is some slight differences...but not enough to make a difference in the running of the motor.

 

I'm running a non intercooled pump on my intercooled motor. All i did was swap the pump out. Didn't change anything else. When i had it rebuilt i sent an intercooled ksb with the pump so they swapped it out while rebuilding. I might be one of the lucky ones though.

 

Yeah you can probably get away with going with longer DV from a Non-IC motor onto a IC injector lines.....just pushes back a bit. Might be tougher going the other way though?

 

Very true. You've got me wondering T, would the difference on the internals of the 2 pumps contribute to my relentless haze?

 

Cows I didn't mention the bigger DV's in the pumps as he wasn't swapping pumps. He asked what was needed to swap the complete motors from a 89-mid 91 into a 92/93 truck. DV's don't need to be changed since he isn't swapping one pump to another engine.

Also to swap the intake plates a slight adjustment to #1 line was required to miss the sensor. A picture of this plate installed on the 90 motor is shown on page #2 on my build thread. Now all lines and plate sensor placement should be the same but slight modifications may be needed if previous owners messed with the lines or something similar.
https://www.dieseltruckresource.com/...-279787/page2/