If you can't hear it with the covers on it is likely normal. Whenever I run with the covers off I am convinced that the engine is about to grenade because of all the noises, put the covers back on and all is OK. Only my opinion.
__________________
Grant
Arctic Silver 2000 Boxster S - bought with a broken engine, back on the road with the engine replaced
Green 2000 Boxster 5-speed and 1978 928 auto
1987 924S 5-speed (Sold) - Blue 2000 Boxster 5 spd (Sold)
|