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Old 06-04-2014, 03:02 PM   #1
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Roof AC gasket life

Our new-to-us Country Coach has three rooftop AC units. Our previous coach, a Winnebago Journey, had basement AC and we had it for 8 years so never had any concerns with roof top AC maintenance.

My DW says I just like to spend $$$$ on the coach and I say I believe in preventative maintenance. What is the average life expectancy of the gasket between the AC unit and roof? We will be in Country Coach territory (Oregon) in July so I have considered having one of the many places that service these beasts replace my gaskets. I see no evidence of any leaks at this point and I have gently torqued down the bolts holding the AC units to the roof.
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Old 06-04-2014, 04:27 PM   #2
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I, too, believe in A LOT of preventative maintenance, yet both on my 1997 American Eagle are original and do not leak...believe your personal visual observation and conclusion are most important... They would not be difficult to replace - just a little time. Perhaps a tube of Dicor around each would bring that peace of mind easily for a total of only thirty or so dollars.
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Old 06-04-2014, 04:31 PM   #3
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Quote:
Originally Posted by smlranger View Post
What is the average life expectancy of the gasket between the AC unit and roof? .
smlranger
Mine are 18 years old.
I check the inch pound torque of the mounting/hold-down bolts once a year and tighten them if necessary.
(The torque specs should be in your A/C manual).
Mel
'96 Safari, 132k miles
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Old 06-04-2014, 05:46 PM   #4
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Quote:
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smlranger
Mine are 18 years old.
I check the inch pound torque of the mounting/hold-down bolts once a year and tighten them if necessary.
(The torque specs should be in your A/C manual).
Mel
'96 Safari, 132k miles
OK, mine were so loose when I checked them, they were ready to fall out. The prior owner apparently did not check that item. I snugged them up but did not check torque.

I guess since the gaskets are protected from the sun and shielded by the AC unit, they have a pretty long life. Your's certainly have.
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Old 06-04-2014, 06:08 PM   #5
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I changed mine at 14 years and 15 years. The same time as I replaced the AC's.
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Old 06-04-2014, 07:21 PM   #6
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The only reasons I have personally seen for replacing these gaskets are, moving the unit or over-tightening and ruining the gasket. The spec for tightening is 14 inch pounds, that is roughly finger-tight. This gasket has adhesive on both sides.
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Old 06-05-2014, 06:48 AM   #7
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The only reasons I have personally seen for replacing these gaskets are, moving the unit or over-tightening and ruining the gasket. The spec for tightening is 14 inch pounds, that is roughly finger-tight. This gasket has adhesive on both sides.
Ray,IN
40-50 inch pounds is the torque specified in my Duo-Therm Penguin manual.
Apparently there are different torque specs for different air conditioners.
What make/model roof A/C are you talking about?
IMO, posting incomplete information is irresponsible, and could be dangerous.
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Old 06-05-2014, 06:44 PM   #8
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http://www.nwrvsupply.com/manuals/du...stallation.pdf mounting instructions do say 40-50 in/lbs. I really fat-fingered that one, sorry. I was trying to complete mels post #3 that omitted the spec.
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