98 motor in a 95 suburban

[adamt]

Hello all. I have looked on the forum and searched for an answer to this so if it has been asked just push me in the right direction. I have owned a few 6.2 diesel suburbans in the past and have decided to upgrade to the 6.5td. Picked up a 95 k1500 suburban with new 4l80 trans and 165,000 miles on the cheap but it had no motor. Found a wrecked 98 k2500 and got the motor complete minus starter for 400. Putting the motor in and most everything seems to plug right up. What issues will I run into with using the newer motor in the older truck? It seems the 98 motor has a few "extra" connectors that the 95 harness does not. Will these make a difference out will it just run as an obd1 without these? Any issues that would cause the vehicle not to run? Any help or advice would be greatly appreciated. I am aware of the pmd issues and will be installing a remote mounted pmd with heat sink. This will be our next family vehicle (replacing 02 Montana) so I don't need a lot of power mostly shooting for reliability over anything.

[trbankii]

As you note, the difference is OBD-I to OBD-II. The block is the same, though, so you should be able to just hook it up as an OBD-I setup. You may have to replace some of the sensors, though. Someone more familiar with the differences can likely chime in with the particulars.

[adamt]

Cool, that is what I thought. I guess we will see here soon. Thanks

[Robyn]

Swap all your sensors to the 98 engine along with the wiring off your engine as well.
The bell housing bolts are metric on the 98 and the 95 is standard 3/8-16 thread.

The only issue I see possibly causing trouble is that the injection pump is different on the 98 (2500 truck vs 1500)

The computer may not be happy with this

The 1500 truck has EGR and the 2500 may not, and if the computer on the 1500 does not see an EGR it "may" not like it.

Basically you need to keep your truck OBD1 for everything to be happy and work properly.

No matter, any issues are going to be minor and a fix will be relatively easy.

[trbankii]

Picked up a 95 k1500 suburban with new 4l80 trans and 165,000 miles on the cheap but it had no motor.


Swap all your sensors to the 98 engine along with the wiring off your engine as well.

Note that he has no engine in the ’95 to swap from. The EGR and injection pump are issues I had not thought of.

If the ’95 had a engine - seized, cracked, or otherwise - it would be a simple matter of swapping the required pieces.

[adamt]

Have been real busy this week so haven't been able to do much with the suburban. Got a little time today to work on it. So far there are only two sensors that dont seem to be supported. The red one was plugged in at the bottom of the power steering pump. The other is still plugged in with the remainder or the 98 harness on there and I pointed to it. Are these just convenience or "extra" sensors or will I need to find a way to integrate them?3053

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