95 LS swap into a 91

ASSISTANCE Stock Engine-Bay Components
1

Okay…I blew my engine a while back. Searching far and long for a new motor. Couldn’t find one that fit my budget until last week. I found a 95 B18b1 with about 90,000mi on it. I bought it. Brought it home. I’ve never swapped a motor before. I’ve taken a couple out, never put one back in. Right now I have the motor out. The transmission off. And I’m in the process of transferring everything off of my old motor to my new one. This is where I ran into several problems.
First: I ran into three sets of wires in the back of the block. I noticed my new motor doesn’t have this. I ask around they tell me because the new motor is OBD1 and the motor I have is OBD0. “Thanks guys…” I’m sorry, but telling me what it is won’t help. Telling me HOW to fix it will help. I know everyone on this site can do just about anything to their cars so I’m ASKING. PLEASE tell me how I can get this engine harness to match up to my new motor. I’ve searched this site. It says I need to move the wires to the thermostat housing. Ok, I haven’t a CLUE what that is. Please help!

(p.s. the one i’m talking about has a black boot that’s connected to the block w/ a yellow and black wire coming out from it. I tried to center the wires as perfectly as possible

swap 015.jpg

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isnt that a knock sensor? and dont the OBD-0 B18a’s not have one? maybe do a search for knock sensor, or read the swap guide for more info.

3

thermostat housing, thats where the thermostat is kept. your repair manual should show you where its at (under the throttle body), you do have a book right?

I did this same swap into my car, a 96 b18b1 into a 90. Its been so long I can’t remember what the steps where, but i do know that with the blocks pulled and compared side by side, you should be able to use common sense about what needs to be altered and/or switched over.

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p.s. thats not the knock sensor. its a thermal sensor, so by moving it to the thermostat housing, it would make sense.

5

ok thermostat housing is where the thermal sensor is? the guys i bought the motor from said that i need to extend the fan wires to the thermostat housing.
i have a book for my car, but not for the b18b1 motor. so i’m confused on what to do. i’ve been stuck w/o a car for about 3 weeks now. i’m upset