2001 Buick Park Avenue 6 cyl Front Wheel Drive Automatic 87000 miles
on lite acceleration loud! Knock.
on accel in 4th od no noise
sounds like a rod or main but, car was driven 2300 miles on the road at speeds of 70-80 mph.
Engine was wot many times to 5600 rpm.
no metal in oil.
Checked fly w for cracks'
checked for loose bolts
checked converter bolts
Noise is load sensitive