I found a clean b18a out of a 91 Integra with low miles.

Need to know what I need to put it into this 94 Integra?

The 94 has everything, motor is bad.

Will it act as a direct replacement (plug and play) or do I need to make modification?

I have searched and only found about EG body style transplants.

 

If it was a 92-93 B18A it would have been easier. A 91 B18A is OBD-0 and you need to get OBD-1 parts from your bad motor and swap them on to the B18A.

 

Like what? thats what I'd like to know.

 

I already have it in and bolted down and hooked up to the tranny.

It has the IM and headers on and radiator is in place and attached.

just remembering where all the plugs go is getting difficult


It should work with the 94 dizzy and ecu?

 

i believe to make it work you need to swap over the intake manifold along with injectors and fuel rail, distributor and starter, alternator. and the engine wiring harness. i might be forgeting a few things but thats the majority of it.

 

Have you done this or are you just guessing?

I didnt swap the head becuase I didnt want to mess with the surface of the new motor.

 

Swap everything over from your 94 onto the bare b18a longblock and you're good to go. Alternator, Dizzy, Manifolds, etc. Also, the coolant temp sensor is in a different place so you either need to swap the thermostat housings or extend the wires. The pcv setup is also different so swapping the intake manifold means you need to swap valve covers.

Basically, strip the b18a and use all your b18b stuff.

 

Yes, I have swapped over the water pipe and housing like you've said.

I really didn't know what I was getting into when I purchased it but for a $100, how could I refuse.

I have attached everything the old motor had and have noticed a sensor at the back of the block, but no connector on the 94 harness matches. Am I OK leaving it unconnected?

Also I have heard that the 91 obd0 motor has a diffrent crank sensor than an obd1 b18b.

That I should use the old oil pump and lower crank sprocket to get it running with no codes and be able to connect to the sensor..is this true?

 

Since you have the new sensor swapped over, just leave the stuff on the back of the block alone it's fine.

Neither of those engines has a crank sensor, it's only for obd2 blocks.

 

Excellent, thanks.. I'll let you know how she runs once I get all the connectors and plugs figured out.