prerunxj93

Converting 92 yota pickup to r134a. the lowside port does not seal up though i add refridgerant and it leaks out whats causing this? i thought it was the shrader valve so i replaced that but did not fix the problem what is the problem?

Jeffires

You have to get the valve from AutoZone. All the others I looked at were not right. Buy their fitting, then get a valve core remover, remove your existing valve core, and then put the valve from AutoZone on it.

I just did this and the kits that are made to go over your existing valve stem cause it to leak. If you use the kit I mentioned (it says Quest - made by EF Products), you shouldn't have any trouble. I just did mine and it is working perfectly.

prerunxj93

oh. alright thanks i check it out.

kt19

I need to do this to my truck. What all is involved in doing this and what else needs to be replaced? Is there a kit? Just a couple of questions I haven't searched just seen the thread.

taikowaza

I can't for the life of me find the A/C service ports on the 1992 2nd gen 4runner. Anyone who knows where the high and low a/c service ports are located, a picture with an arrow would be very appreciated!
barring that, a detailed explanation of how to find them would be great.
I heard that they are on the passenger side somewhere, my buddy told me "below the power steering pump"...and I looked for a long time (from above and below) but can't seem to find anything.
Thanks in advance-
TW

Jeffires

This is from my '91 3.0 Truck. I would think yours is the same, but I haven't worked on a 4Runner.

Passenger side, against the firewall.




Here they are labeled:

taikowaza

Jeff thanks a lot for taking the time to put your photo in there!!!
I am going outside to check on this now, if it matches the 4runner, you've saved the day. thanks again.

T

taikowaza

Jeff-
you were right, after seeing your photo, I was able to zero in on both the input/output valves. Thanks a lot for that.
Now, I have another problem. The low pressure service port is SO wedged in that there is no way that I can fit a charger to it. I tried for quite some time but it is totally jammed in there. Is there another way that I can get a charger nozzle over it, any advice from someone who has successfully charged their 3.0L 'runner a/c would be great. thanks
TW

Jeffires

What are you trying to use? If you just want to add refrigerant, use something like this:




It is a tight fit, but it will work.

taikowaza

thanks a lot Jeff.
That is the exact bottle I had. I had to bend some pipes out of the way but it finally worked. turns out I had a leak too, I got some dye and put it in, sealed leaks, put a new tube, adjusted a/c idle, and presto! cold air.
saved myself severl hundred $ thanks to your help. appreciate it!!!!!!!
how is new orleans now, pretty wet still? we love bourbon street.
take it easy and thanks
T