2002 Jeep Grand Cherokee • 6 cylinder 4WD Automatic •

I have a 2002 Jeep Grand Cherokee with the straight six, there has been a tapping sound coming from under the hood, it comes and goes. Sometimes when it first started and sometimes when it's under a load, like going up a hill. I've tried using a higher octane gas and it seamed to help but it came back. The engine has 165,000 miles on it and has been serviced regularly.
Steven J. Haas
November 30, 2010.

You need to identify where this tapping noise is originating from when you 1st start the car and get back with the location

Nov 30, 2010.
The noise Is coming from the engine compartment on the driver's side.

Steven J. Haas
Dec 1, 2010.