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Overcharged and high side gauge flutter?

scoob8000 on Sun August 26, 2007 10:45 PM User is offlineView users profile

Year: 1996
Make: Buick
Model: Roadmaster
Engine Size: 5.7
Refrigerant Type: r134a
Ambient Temp: 75

My friend was complaining of the AC in his newly acquired roadmaster not cooling well.

The accumulator would barely get any condensation on it, but the compressor wasn't cycling on and off.

Static readings were 120psi on both sides! Engine was cool, and it was only 75 outside.

We checked it running anyway, pressure was around 60 low, 250 high at 2000 rpm.

The high side gauge was fluttering like crazy and you could feel the high side line vibrating.

I advised him not to run the AC until I look into this further.

Safe to say it's really overcharged? I also noticed the high side line was very hot, so hot I didn't want to remove the coupler without a rag.




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iciss.net - Iron City Impala SS Owners

Chick on Mon August 27, 2007 5:32 AM User is offlineView users profile

Try this, engine off, try turning the outer hub with one finger, if it turns easily, your reed valves are shot.. If not, evacuate and recharge the exact amount called for, then start the diagnosis...Hope this helps..

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Chick
Email: Chick

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Freedoms just another word for nothing left to lose

scoob8000 on Mon August 27, 2007 6:43 AM User is offlineView users profile

Thanks for the reply.

I'll have him try spinning the compressor by hand.

Do those pressures seem high? 120 with the car off and cool blew my mind.

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iciss.net - Iron City Impala SS Owners

Wet in Washington on Mon August 27, 2007 6:53 AM User is offline

Chick, would the reed valves die from lack of oil?

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Never take life seriously. Nobody gets out alive anyway.

Chick on Mon August 27, 2007 6:54 AM User is offlineView users profile

That is static pressure, it will be around the same as the temp around the lines..Hot engine, high ambient, high static pressures

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Chick
Email: Chick

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Freedoms just another word for nothing left to lose

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