Amer

So im using a 3.4 from a 98 4runner, put into a 93 pickup using the original 3.0 compressor.
Everything bolts up right but the compressor is set back further then the crank pully so the belt just slips right off.
Do i need to get a special bracket or one from a different year? I think im using the 3.4 bracket, it didnt seem like the 3.0 one would bolt up right.

SacRunner

Thats one of those questions that's been asked a few time over the last couple of months, and to be honest, I don't know what the resolution of them has been.

For me, the R12 compressor from my '91 3.0 bolted right up to the ('96) 3.4 A/C bracket, and with the 3.4 pulley and spacer swapped over the belt lined up no problem and has been running strong for 2 years now.

It sounds like you're using the 3.4 bracket, did you swap the pulley and spacer from the 3.4 compressor to the 3.0 compressor?

wyoming9

iTrader: (1)

I would bet the wrong pulley and spacer.

69sixpackbee

I had the same issue. The problem is that the Runners use a Denso 10PA17C which has a longer body than our truck's 10PA15C. The 3.4 engines use different AC compressor mounting brackets for different vehicle applications. The bolt pattern fot he $Runners is different than that of the truck applications. This is why those folks who have done 4Runner to 4Runner swaps say that "I had no problem. Unfortunately, those of us who have sourced out donor mills from 4Runner to put into trucks have run into this exact conundrum. Conversely, the opposite would apply here as well. This accounts for a 10MM discrepancy in length. What I did to remedy the problem was find another pulley with less offset (outward) and I resolved my problem. I scoured the junk yard and came up with a 6-groove one off of a mid-'90s Jeep Cherokee that fit fine. Ours had a 4-groove pulley and the 6-groove replacement had the same OD as well as the same 40 degree groove pitch. It just rides on the innermost ones but it will be just fine. You can use the same coil. Just make sure that you get the air gap spacing around .020"

Bud

Amer

Awesome! thank you so much.

what do you mean by airgap, between the two belts? Was it the pully from the a/c compressor or some other unit?

I did swap the pulley/spacer from the 3.4 unit but theyre physically different sizes.

69sixpackbee

The air gap is the distance between the coil surface and the hub clutch surface. The hub that is screwed down onto the shaft of the compressor has a spacer(s) up inside the splined hub boss and this is what you use to set the air gap. The hub is encased in an elastomer that acts like a spring and it has enough compliance to spring back and forth, engaging and disengaging the clutch.

Good luck
Bud

Amer

awesome, thank you for your help. Gonna start trolling craigslist and local junkyards to find the best price.
Im not sure how to set the air gap, but im sure google does, not to worried about it.
Ive been trying to find this info about the pullys for a while and i found a few threads with the issue in it but wasnt able to find what they did to fix it, other then swap in the right compressor and convert to 134a. I appreciate it very much.

69sixpackbee

This should help...

http://www.polarbearinc.com/PBPC/Hom...oducts_CL.html

greenbuggy

Another 93 pickup with 3.4 from a 96 T100 swap owner here, my R12 compressor will not line up have tried several brackets from 3.4 4runners and Tacos with no luck so far. Suspect my "fix" is going to be ditching the R12 compressor in lieu of an R134 compressor from a newer pickup and swapping the top plates.

akamon808

Hello, when I did my swap I used the 3.4 compressor w/ the 3.0 av lines and cap. All that was needed was to change the trigger wire to the compressor, I think from positive to negative. Have no problems with the pulley. Hope this helps.

Sent from my iPhone using YotaTech

69sixpackbee

If you put on the later 10PA17C pump you can swap the hose connection block on the top to accommodate your earlier lines and you are good to go. Remember, compressors don't care which gas they are pumping. Stick with the R12 and add back in the SAME amount of MINERAL oil that you drained out of your existing compressor. A little bit of the original PAG that remains in the 134A pump that you use (if it's a used one) won't be enough to worry about. Just blow out what you can with clean and dry compressed air.

Bud

cat100

Thanks! This helped me a lot.

cat100

For future searches, I ended up using a 97 Jeep Grand Cherokee pulley and it was spaced out far enough.

So 93 T100 stock compressor to 98 4Runner 3.4 bracket with 97 Cherokee pulley. AC works great.

defrag4

Im running into this same issue, so all you had to do was swap over the Cherokee pulley? the toyota front clutch plate and little spacing washer inside there stayed the same?

Thanks!

cat100

I beleive I used the 3.0 bolt and washers. Run it and if the comp dosent cycle on and off periodically or wont even cycle on you will need to look at trying to squeeze feeler gauge in there. I couldnt measure the gap cause the jeep pulley i got sat farther out and covered the gap.

defrag4

FYI I was able to grab a pulley off a 93 Grand Cherokke, bolted right up to the toyota compressor/ac clutch, i used 3 of the spacer washers to get the right clutch distance

defrag4

pic of the pulley on a 4.0 Jeep

defrag4

dont forget your snap-ring pliers!

defrag4

FYI here are a few other cars that use the same pulley

cat100

Great. Does your compressor cycle on and off periodically? Mine stays on till you turn it off via the switch, I know that on stock trucks it will cycle. So maybe I have an elctrical issue.