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Engine Noise at Idle
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rickb67
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PostPosted: Wed Sep 16, 2015 9:01 am    Post subject: Engine Noise at Idle Reply with quote

I purchased a car from a former member. He sent me a video of the car running and told me that there was a helicopter running in the background. Well the helicopter type noise is the engine. It runs alright except at idle the engine rocks. What should I look for... Nose cone?.... Transmission Mount bushings?
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FreeBug
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PostPosted: Wed Sep 16, 2015 1:50 pm    Post subject: Reply with quote

Helicopter noise? First thing to check is if there isn't a rag or something on the fan, sucked in from behind the shroud.
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66brm
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PostPosted: Wed Sep 16, 2015 1:55 pm    Post subject: Reply with quote

Sounds like its missing on a cylinder or two, if it has dual IR carbs it may be plugged idle jets or miss adjusted idle mixtures
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theDrew
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PostPosted: Wed Sep 16, 2015 3:20 pm    Post subject: Reply with quote

check for exhaust leaks too...they have a sharp snap of kind sound...at least on my exhaust
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rickb67
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PostPosted: Thu Sep 17, 2015 11:43 am    Post subject: Reply with quote

I can actually watch the engine rock. Even the slightest increase in RPM silences it.
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jason
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PostPosted: Thu Sep 17, 2015 4:20 pm    Post subject: Reply with quote

Take the fan belt off and let it idle. My brothers car sounds like a helicopter at low idle, his fan shroud. Goes away around 1000 rpm. Gave it a few pushes and pulls, good to go.
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