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Mazda Truck a/c leak

TxTaurus74 on Sun September 02, 2007 1:44 PM User is offline

Year: 1997
Make: Mazda Truck
Model: B2300
Engine Size: 4 Banger
Refrigerant Type: R134A
Ambient Temp: 90
Pressure Low: 24-70
Pressure High: 90-125

Quick background. About a year and a half ago I had the a/c fixed locally. A few months ago the a/c stopped blowing cold. I decided to quit wasting money sending it to a place to get fixed when I can fix it myself and save myself some money, plus it took them a few tries to fix it the first time. I consider myself mechanical enough to work on things like this and also like working on cars/trucks for fun. I ordered some a/c gauges, vacuum pump and leak detection from about 2 months ago. I finally got a chance today to hook up the gauges to get the readings, at the mercy of my wife since its been quite warm and humid here lately. I also put in a 12 oz. can of R134a into the system. It allowed the temp to drop once the can was in and the compressor didn't cycle on and off real fast. After a few hours though its back to cycling again and the air temp has almost lost the coolness to it. I started looking around with the UV light and noticed that the previous repair place had put die in the system because I was able to see the die inside the high pressure valve under the plastic cap. I'm guessing its not leaking there and thats just from hooking up the gauges that it showed there. I did find quite a bit of glow behind the clutch where it connects to the compressor. After looking at all the other connections I could not find anywhere else that any die showed up. I guess what I'm asking is does this make sense that the compressor has blown out behind the clutch. It is stamped re-manufactured on it and I'm guessing wasn't a quality compressor rebuild considering the compressor looks brand new still.


Wet in Washington on Sun September 02, 2007 1:51 PM User is offline

I think you just answered your own question, the front seal on the compressor is leaking.

Never take life seriously. Nobody gets out alive anyway.

Chick on Sun September 02, 2007 7:21 PM User is offlineView users profile

Your truck uses the FS 10 compressor. (Ford), so it's NOT advisable to use reman units on these. Also while the system is empty (you do need to change the compressor) check the O tube and see if it's loaded with junk. Looking at your pressures, you are probably Ok, but why takes chances since it will be empty anyway. Check out these NEW FS 10 compressors, be sure to check the spring lock fittings for leaks also. Might want to put new o rings in while it's apart too...Hope this helps.

Email: Chick


Freedoms just another word for nothing left to lose

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