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Old 07-07-2012, 04:54 PM   #1
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Default Air Conditioning -Insulate Pipes?

Has anyone insulated their under hood AC lines/Pipes with foam or other thermal material to get the AC colder?
Under the hood of my Park Ave my two lines by the firewall have a silver material on the top. However the two on left side only have some thin rubber liner....Ideas what I should use ?? The condensation still needs to drain off...

I had though of using a split type of foam, but maybe a silver wrap is better?
It really is not all that hot outside but it seems the car get warm quickly.
The dash temp was 105 using an instant probe..

In the sun I would like it cooler but the vent temps are really good when set at 60F. Managed just under 30F coming out of vent.

So does wrapping the lines make it better, anyone done this?
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Old 07-07-2012, 08:21 PM   #2
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If anything, just wrap the colder line with that foam insulation you use for household water pipes. Don't wrap the other one. That one needs to cool back down to "condense" the gas.
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Old 07-08-2012, 09:47 AM   #3
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i would stay away from adding insuation just because keeping the water in is going to rust the pipes, its such a short run likely no effect anyway.
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Old 07-08-2012, 11:04 AM   #4
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If your vent temp is 29 when set to 60, there'* not much you can do to make it colder. That'* optimal temp.
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Old 07-08-2012, 12:15 PM   #5
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Never seen aluminum rust.
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Old 07-08-2012, 02:15 PM   #6
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Quote:
Originally Posted by Mike1995 View Post
Never seen aluminum rust.
Neither have I, but it does corrode.

As far as insulation, don't see much need with temps like that. Wish mine was that ice cold
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Old 07-08-2012, 02:19 PM   #7
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On thinking about it, the concern is in the sun, and these readings are with it cranked to 60* maxed out. I wonder if there is a dirty temperature sensor, or a solar sensor is not working right? Maybe you can make an adjustment to another component of the system?
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Old 07-08-2012, 03:31 PM   #8
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I dont often see 29F. That was 1st thing in AM and cranked. I generally have readings of 35-41F with setting left at 60F and the fan down one from MAX speed , driving at 1500rpm.
The whole system is reduced at at idle and I often see temps rise above 42, set at MID vents using the Taylor Temp probe.

I did go and buy some of the pipe foam insulation, and found temps not to be as good once installed. I just removed the stuff I put on pipes near firewall but have left the run I did on the cold pipe left of serpentine belt area. I may just end up ripping it all out?
I placed the opening down wards on pipes so it still can drain. I think my AC is in good shape and I wonder if the foam is preventing the pipes from turning to the real icy white?
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Old 07-08-2012, 03:55 PM   #9
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Fan at max speed will result in higher vent temps than a lower fan speed. The air gets blown over the cooling gills faster and therefore can't cool down as much. Set the fan lower and you'll see lower temperatures.
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Old 07-08-2012, 09:49 PM   #10
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Today it was hot enough.. temps inside car after parked was 125 F.
The AC worked well after car cooled down with windows down, but had a bit of an issue after driving for 30 minutes on highway. It seemed like the temps hit 29.9 in center vents and then very little air coming out of them. I turned off the system, then restarted it in auto 5 minutes later, and it was ok again normal air flow. Is it freezing up?
Question: What does the park ave do when it reaches it 60 inside or what ever it is set at? Does the fan slow down or??
It does not seem that the AC clutch is cycling at all. I am going to try in the Am, to set in defrost mode @ 70F tomorrow and see if it then cycles. Maybe a low pressure switch if it does not cycle?
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