Sounds like a helicopter??
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Joined: Aug 2014
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From: Michigan
Sounds like a helicopter??
Just noticed a helicopter type sound coming from the top of the engine while idling in the driveway. Shut it off and started up again - sounded normal. Revved it up a few times - normal. Then it started doing it again.
Not loud enough to hear it in the cabin but I'm concerned. Do I have something going out?
Not loud enough to hear it in the cabin but I'm concerned. Do I have something going out?
Last edited by jjaaam; Sep 15, 2016 at 05:38 PM.
Thread Starter
Pro
Joined: Aug 2014
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From: Michigan
Thread Starter
Pro
Joined: Aug 2014
Posts: 717
Likes: 80
From: Michigan
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Melting Slicks
Joined: Jan 2014
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From: Central Florida
Check the air pump check valves to see if the hose blew off of them they go into exhaust manifold one on each side.
The hose could have come apart anywhere if one of the valves went bad and is allowing exhaust to escape.
You can see the driver side valve but the passenger side valve is back by firewall but is connected at manifold in the same spot as the driver side.
Tech would also be a good place to ask this
Just saw you already did and someone beat me to the air system, mine did this and sounded similar
The hose could have come apart anywhere if one of the valves went bad and is allowing exhaust to escape.
You can see the driver side valve but the passenger side valve is back by firewall but is connected at manifold in the same spot as the driver side.
Tech would also be a good place to ask this
Just saw you already did and someone beat me to the air system, mine did this and sounded similar
Last edited by Forcedvert; Sep 15, 2016 at 10:51 PM.
Melting Slicks
Joined: Nov 2005
Posts: 3,323
Likes: 142
From: Green Valley Arizona
Could try the tissue trick; short piece of tissue with fingers, moved over exhaust manifolds to see when the tissue begins to flap around.
Usually an exhaust leak is worse at cold start-up than warm due to metal expansion closes the gaps, but sure sounds like an exhaust leak...although I have heard a PCV valve do this due to an engine problem.
I would suggest looking into the noise source.
Good luck.
Usually an exhaust leak is worse at cold start-up than warm due to metal expansion closes the gaps, but sure sounds like an exhaust leak...although I have heard a PCV valve do this due to an engine problem.
I would suggest looking into the noise source.
Good luck.
