Re: Sbc 350 engine noise
It does not sound like an internal noise to me. It sounds like squealing, like a belt. Check for a new vacuum leak, belt squeaking, or a bad bearing in one of your accessory pulleys. Also, make sure you did not blow a head gasket and that noise is air or water moving where it should not. How is your oil and coolant ? Look under that breather in the valve cover and check your PCV. Does it have milky white stuff around it ?
also, check your intake manifold bolts. If they are loose, that could be a sucking noise interacting with a gasket to make it sound like squealing.
Also, check how hard it is to turn your accessory pulleys by hand, and jiggle your pulleys to see if the bearing is moving excessively. Check the water pump carefully.
1970 Chevelle SS396 (408), Fathom Blue,
Original Block & Forged Crank, KB Pistons, Edelbrock 6045 Heads,Comp Cam 292H, March Serpentine, RPM AirGap,750HP,100hp Nitrous
A/F Wideband,Tremec TKO 600, 12 bolt,
30 spline Moser Axles, Richmond 3:73's, Hotchkis control arms, swaybars, springs, Wilwood 12" rotors D/S, 4 piston calipers