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My Ford SLC blew apart in the parking lot!

dannyual767 on Tue August 28, 2007 9:41 AM User is offlineView users profile

Year: 1991
Make: Ford
Model: Mustang GT
Engine Size: 5.0
Refrigerant Type: R134a
Ambient Temp: 87
Pressure Low: 21
Pressure High: 225
Country of Origin: United States

Okay, I put it all back together and the above numbers were what I got with a vent temp of 40 F @ 1500RPM. I recharged 30 oz of refrigerant.

Soooooooo, I'm parked at the airport parking lot for 4 days and I get back yesterday. Jump in the car and fire it up. Usually I can feel the cold air within about 5 secs out of the vent. Not this time. I pop the hood and see my o-tube line disconnected from the evaporator at the firewall !!!! When it blew, I don't know so I have no way of knowing how long it was apart.

When I replaced the evaporator 1 month ago, I know that I gave this connection an "extra push together" because I was worried that I didn't get it connected properly. I forgot to put the stock Ford SLC clip back on at the time but I remembered about it on the hot, sweaty drive home!

Anyway, I got home and pulled out the nylog and my Mastercool pump. I put nylog back on the o-rings and this time when I pushed it together, I definitely, 100% heard the audiable "click" of the SLC locking together . Just to make sure, I put the stock, locking clip back on. I also replaced the clips on the two other connections at the condenser. I pulled a vacuum for over an hour and then let it sit for 1 1/2 hrs with no leakage. Recharged and got the above numbers.

I think that if I'd had the clip on, the hose wouldn't have disconnected. Maybe it would've leaked, maybe not. In any case, I think that it is a good idea to put the clips back on these lousy Ford SLCs!

It seems like my Mustang airconditioning nightmare just won't go away. I'm praying that I'm finally waking up from it.

JJM on Wed August 29, 2007 2:06 PM User is offline

I always use reuse the SLC clips, but they shouldn't be your primary source for keeping the connection together. That's the job of the garter springs

If you replaced the garter springs on ALL the SLC connectors, and lubed up the O-rings and inside surfaces of the female connection with compressor oil, the connection shouldn't just come apart like that. Did you use new garter springs on the line in question, and was the female fitting clean and in good shape?

Between the FX-15 compressor and SLC connectors, indeed these vehicles left a lot to be desired A/C wise.


When considering your next auto A/C purchase, please consider the site that supports you:

dannyual767 on Thu August 30, 2007 12:32 AM User is offlineView users profile

Joe, I replaced the leaking evaporator about a month ago. The o-tube line was new last summer so both the male and female ends are new and clean. I used nylog on the o-rings when I put it together.

After replacing the evaporator last month, when I made the SLC connection, I don't think that I got the "click" as the two parts came together. I remember trying to push the two parts together since I wasn't comfortable with the connection. I pushed them together hard and they didn't move nor did I get the "click" so I felt that the parts were properly connected. Obviously I was wrong !

This time, I heard the "click" loud and clear so I know its connected properly this time !

BTW, I've got vent temps as low as 37 F at 55 mph (1500rpm!)

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