Checking for cause of leaks

[JMcFly]

The AC in my 02 is out of service currently. Guessing low charge / no charge.

Before I go out and replace every component in the system is there a best practice on checking for leaks? I’m already going to replace all seals, receiver/dryer, and the expansion valve. Feel like I should swap out the schrader valves too.

I had a metal and rubber hose pipe on my Tacoma start to leak which was obvious. But I can’t see any oil accumulation on any pieces.



Is there dye in the factory charged system?

 

[Jazzer]

With a 2002, I’d go ahead with your plan of replacement. I don’t believe Ford used a dye in the original refrigerant.

The alternative is to find the leak, recover the charge, repair the leak, and recharge. Meanwhile every other connection, the condenser and evaporator would remain original.

Check your condenser carefully for oil leaks- hard to see but should accumulate more dust. I replaced mine when I rebuilt my A/C. It’s subject to road damage with our open grilles.

There are cheap electronic leak detectors but I never had luck with them.

If you opt to do the entire system repair, don’t forget to flush the lines. Autozone sells an aerosol flush, #CA-1.

Good luck!

 

[JMcFly]

I don’t really want to replace the entire system. I know it’s standard practice to change out the receiver dryer and valve.