Valve Clatter, Intake Noise

Oct 02, 2003 2 Replies
S

Hello newsgroup,



I have a 91 5.0 LX, Auto Trans, 105k miles, all stock except for a Densocharger CAI. I have two questions concerning my car.



When accelerating, I hear what I think is valve clatter. It just recently started (or I'm noticing it for the first time.) Aren't the valves in this motor self adjusting? Is there anything I can do from the maintenance side to take care of this? Any info/suggestions are appreciated.



Secondly, when accelerating I hear a intake noise that sounds like air being sucked into the engine from the passengers side of the car, kind of like a air leak in reverse. This is my second 5.0, and I don't remember my other car sounding like this. Any idea what causes this? I checked the exhaust manifold, air intake plumbing, etc., for cracks, holes, etc. couldn't find anything. Any info/suggestions are appreciated.



Thanks...



Sariwa


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N

Probably not valve train but rather "pinging". Try a higher octane gas for a little while and see if it goes away. You eventually need be sure you've set the ignition timing to factory specs.

On carburated cars I would spray a little carb cleaner around to find a vacuum leak. The carb cleaner gets sucked in and the motor runs a little faster. Don't know if this works or should be tried on fuel injection (injector cleaner?).

-= Francis Yarra =- fyarraATjunoDOTcom

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L

The sucking noise you hear is normal intake sound from the CAI. With the intake in the fender, the noise gets transmitted into the car. On my car, I installed a piece of sound insulation in the fender between the intake and the passenger compartment. Quiet as can be.

LJH

95GT

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