CAD 500 Parts Knock! Knock! Page

Welcome to our Knock! Knock! page.
. . . A few clues to why that great old Caddy motor is making nasty noises!

Never use silicone sealer on your oil pump gasket. It'll squeeze right in there and plug up your oil passages in the motor, and-or cause a problem with the rotor clearance. Pretty soon, no oil is getting to your bearings and . . . Knock! Knock!	Never attempt to make an oil pump gasket out of thicker material . . . You'll have too much gear end play, no oil pressure, and before ya know it… Knock! Knock!
Don't leave gasket off the oil pump and use some kind of sealer . . . Gears can protrude above housing surface, and will clearance your block the hard way, and . . . Knock! Knock!	Don't forget to bend your dipstick tube to clear the crank and block . . . 550 foot-pounds of torque will definitely mangle that tube if it's not out of harm's way. . . Tink, Tink, then Knock! Knock!
Don't mistake your oil pump pickup tube bolts for your camshaft gear bolts. The cam gear takes 5-8"; the pickup takes 3-4". Get ‘em in the wrong holes, and when you fire up your motor . . .Knock! Knock!	Remember to stake your oil passage plugs when re-assembling your motor. If they pop out, you'll wonder where all your oil pressure went. Tick, Tick . . . Peck, Peck . . . Knock! Knock!
On assembling your valve train, make sure your pushrods are centered in the lifters before tightening rocker assemblies. It's best to do this with the intake off so you can see what's happening. Bent pushrods or valves can result . . . Clank! Clank!	Jingle, Jingle . . . On pre-’74 motors check your balancer for bad rubber. The crank pulley covers it, and you can reach it with your fingers. If the rubber leaves the scene you'll hear a "jingling" noise only when you shut off your motor.