Re: Speed recirc causes honk from under hood when starting? - Saab 9-5 Bulletin Board - Saabnet.com
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Re: Speed recirc causes honk from under hood when starting?
Posted by PatO (more from PatO) on Sat, 8 Sep 2001 11:00:21
In Reply to: Speed recirc causes honk from under hood when starting?, harry, Fri, 7 Sep 2001 20:54:18
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I have had an occasional sound like a moose bellowing under the hood. It sometimes happens when the AC has been on for along time, and I turn off the engine, and on a few occasions on startup. Dealer has duplicated the sound in my car and others on his lot. He says that it is related to a valve in the AC fluid system. There seems to be no evidence that this noise is a sign of impending failure. I know that in AC systems in general, fluid valves that open and close slowly can cause a hooting noise as pressurized fluid is equilibrating for one side to the other in a partly open valve (My home AC system does this sometimes).
00 2.3
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