66 Chevelle SS396 & 66 Chevelle 327 Convertible.
This is kind of weird. I reconditioned my exhaust manifolds this winter. After I was done I deceided to take the intake of for cleaning so I could repaint it along with the area of the heads on the top of the engine. So after taking the intake off, I then cleaned the head areas and repainted the head area on the top of the engine. I also had noticed two push rods were bent, so I replaced them. When turning the engine to adjust the rockers there was the whistling/screetching noise. It happens about every two revolutions and seems to be comming from the#4 or #6 area of the head. Then about every 3-4 revoltions I hear a softer screetch noise coming from the # 3 or # 5 area. Intake is still off. This is a 66 396 BB Any ideas which might have caused this? Maybe I got some dust into the combustion areas. Any ideas of what to do? Thanks