InternetRoadkill

Short version: I have an 88 4Runner 2.4L EFI that for some reason had a 10P13C A/C compressor on it. These compressors are normally used on pickups because of their smaller cab size. I purchased a 10P15C compressor which is what a 4R is supposed to have on it and replaced the mounting bracket. The idler pulley lines up correctly with the crank pulley so the bracket seems correct. However, the compressor pulley is sitting about 1/2" too far back so there's no way a belt (v-belt) is going to go on correctly. I purchased the compressor from RockAuto and they tell me it's the correct compressor. But obviously not. So I'm stumped. What's going here?

InternetRoadkill

I found the problem. The previous owner had done an engine swap from a pickup. So the 4Runner had a 10P13C compressor on it which is too small and never worked well. So I finally decided to fix the AC and put the larger compressor on it. I replaced the mounting bracket with one I found on EBay. Turns out the bracket is for the 10PA15C compressor and not the 10P15C. The two differences between the compressors are the manifolds and, more importantly, the mounting bosses which are moved forward on the 10PA15C by 16.5mm. If you try to mount a 10P15C to a 10PA15C bracket, the pulleys don't line up. The fix is going to be to make an adapter plate. So be warned -- The bracket and compressor changeover took place around 8/88. My 88 4R was made in late 87.

Boogeyman

Interesting..I might be running into the same issue. I think the previous owner put an AC from a newer 4Runner in..The condenser on mine takes up some room in the engine bay and pushes the radiator a bit. It's pretty Frakenstein under my hood

Boogeyman

Interesting..I might be running into the same issue. I think the previous owner put an AC from a newer 4Runner in..The condenser on mine takes up some room in the engine bay and pushes the radiator a bit. It's pretty Frakenstein under my hood so Im trying to straighten it all out.

InternetRoadkill

My 4R was a Frankentruck as well. I bought it on EBay about 18 years ago for $600. Dragged it 200 miles back to my house on a trailer and spent 6 months locating the missing parts and repairing the 'improvements' the PO had made. In the end, it's been a pretty nice truck -- except for the damn A/C issues.

Boogeyman

oh the joys of owning old Toyotas! $600 bucks though! Man, you can't even find a wrecked shell for that much now! 😂😂

InternetRoadkill

Just a follow up for anyone who cares -- I spent the day making an adapter plate to mount the older style compressor to the newer mount. The compressor mounted perfectly first try. Woot!. I evacuated the system to do a leak test and noticed that it's very slowly leaking the vacuum over the course of 10 or 15 minutes. However, pressurizing the system with compressed air to 120psi, then doing the soap bubble test failed to reveal any leaks. So I took the new compressor off again and replaced the oil with an oil containing fluorescent dye. I then replaced the receiver/dryer and vacuum pumped for an hour. Then it was time to charge it with refrigerant. (I had also replaced the condenser with a newer parallel row unit the day earlier.) Wow! What a difference having the larger compressor has made. I'll need to keep checking periodically with the black light to see if there's any leaks. Keeping my fingers crossed I won't have to open the system again.

Boogeyman

I still...even though this seems like a dead forum. 😂😂😂 Im working on my AC today as well..I definitely need a good one living in the desert.

Robert m

iTrader: (2)

Did you use the original A/C hoses or get new aftermarket ones?
I am having a hard time finding an aftermarket one that fits my A/C compressor manifold. I've bought 3 or 4 different ones and they all have been too small to seal where the O ring goes.

Jimkola

If you have the original hose there are shops that can crimp on new pressure hose to your fittings

Robert m

iTrader: (2)

Tried to have a local shop fix it but, the fitting that goes onto the manifold is what's broken and he wanted nothing to do with it

InternetRoadkill

AFAIK, new hose assemblies are not available. So I bought a crimp tool and made new hoses. What I did was cut off the old crimps with a Dremel and then brazed new aluminum crimp fittings onto the pipes. The threaded ends were still in good shape, so they were reused. BTW, you have to replace the rubber hoses. The old hoses are incompatible with the newer refrigerants and oils.