When was the last time you changed you oil? My guess is a spun rod bearing. This happens on low oil for a long period of time. I've had this happen to me and a few people i know. It started tapping very quietly in some RPM ranges. As time went on it got louder and louder and would do it constantly. also, It would tick during idle. Do an oil change ASAP, if there is metal in the pan or in the oil, you might be looking for a new motor.
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2003 Azure Blue Mach 1- M112 Eaton Supercharger (Stock Pullies/Unported/Stock Bottem End/Stock Heat Exchanger/Cobra Tank and Pumps), 4.10's, SCT Custom Tunned by Excessive Motorsports, SLP 2 w/ Mac Catted H, H&R Sport Springs (Uninstalled), BFG KDW2 295's.
Dyno Numbers- 442.31hp and 386.03tq
Track Numbers- 13.014  @ 115.45 w/ 2.200 60ft (Track Wet)
Progress Pictures: http://s28.photobucket.com/albums/c2.../Eaton%20Swap/
Last edited by cre8787 : 04-09-2008 at 12:12 PM.
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