04 Excursion w/Rear AC - Ford Powerstroke Diesel Forum
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Old 06-05-2013, 05:49 AM
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04 Excursion w/Rear AC

My ex has not cooling very well, I'm getting maybe 10 degrees less ambient temp out of the vents. I hooked up a manifold gauge and I'm seeing 50 psi low and 220 psi high which seems normal to me and I believe is an indicator that the compressor is working OK. I decided I needed to evacuate and open it up to inspect the orifice tube. I found that the orifice tube had a crap load of metal shavings indicating my compressor is starting to fail (3 of the four sections of the tube had shavings where as the last section had no signs of metal).

I've decided at the minimum I am going to replace the compressor, condenser, accumulator and orifice tube as well as flush the lines.

So, I have couple of questions to start.

1) If I replace the compressor, condenser and accumulator and flush the lines, should I just add the total recommended amount of PAG oil that is
listed under the hood? There would still some left in the two evaporators but I guessing it would not be a significant amount, but I am not sure.

2) I've read that it is recommended to replace the evaporator core in the event of a catastrophic compressor failure. I'm seeing metal shavings but I don't know if this would be considered catastrophic although metal is a bad thing.

3) Flushing the rear a/c lines, would this be necessary? I'm wondering if the orifice tube would have protected the rear lines and evaporator.


Last edited by morganbryane; 06-05-2013 at 06:05 AM.
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Old 06-05-2013, 06:21 AM
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Check to see if the coolant shutoff valve to the heater core works, check the HVAC doors behind the glove box. My Excursion will make me put on a winter jacket when it's on full blast. Finding shavings doesn't sound good.

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Last edited by Term3; 06-05-2013 at 06:24 AM.
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