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Old Mar 15, 2011 | 01:28 PM
  #1  
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bigjp
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Stumped

ok v10 guru's i'm stumped on this one. i've got 2 sounds going on the first one is like a buzzzzzzzz which is there constantly. the other is like a valve tap but is only heard when cruising on the highway. not sure what to check fuel injectors leaking exhaust manifold. who knows. thanks guys
 
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Old Mar 15, 2011 | 01:31 PM
  #2  
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BigPigDaddy
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Is the buzzzz coming from the engine bay? If so, can you pop the hood and hear it when idling?

The tapping sound could be an exhaust leak at the exhaust manifold. Have you checked for broken or missing manifold bolts?

If you could give more descriptors it would help.
 
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Old Mar 15, 2011 | 01:39 PM
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yes the buzzzzz is comming from the engine bay but only under load it wont do it when ideling or if you give it gas when under the hood. i have checked the exhaust studs and they seem ok
 
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Old Mar 15, 2011 | 11:01 PM
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The studs could be broken and the nuts corroded to the manifolds. If you can get on them with a wrench GENTLY try to turn the to see if any come off don't put much torque on them. And look for any black soot around the manifold seam.
 
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Old Mar 15, 2011 | 11:23 PM
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check those spark plugs...

might be one getting ready to eject.
 
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