What is the bolt just below the sight glass on the ac dryer? Is it supposed to have a pin hole in the center? If so why do I have r-134a leaking out of the pin hole?
AC dryer/reciever bolt
- Thread starter CarbonCruiser
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- Thread starter
- #2
Can anyone else verify that they do or dont have a pin hole in the center of this bolt?
John McVicker
SILVER Star
It's a fuse plug. Basically it a lead plug that melts if the refrigerant temp gets to high. Once it's open, it will eventually release all the refrigerant. The only option is to replace it. The Denso drier has a 8mm x 1.25 pitch fuse plug. Aftermarket driers may use something more common, but it will probably be easier to just replace the drier than to find that fuse plug.
- Thread starter
- #5
So does this mean that I have a temp issue with my system, or do you think its just worn out?
I've seen them leak for no discernable reason, so it's very possible that it's just age related failure. If your A/C was working prior to loosing the refrigerant, you should be ok. I'd look at the pressures when you get it back together, just to be sure. Your high side pressure should be <250 psi +/-.
- Thread starter
- #7
Is there a difference in dryers for r-134 and r-12? My system is R-134a, if I order a stock dryer will is be compatible?
