Knocks Cold and Continues for 2 to 3 Minutes. Buick Roadmaster 1996

For 1990-2009 cars

• | Engine flywheel contacting the splash shield. Reposition the splash shield.

• | Loose or broken crankshaft balancer or drive pulleys. Tighten or replace as necessary.

• | Excessive piston to bore clearance. Replace the piston.

• | Cold engine knock usually disappears when the specific cylinder secondary ignition circuit is grounded out. Cold engine piston knock which disappears in 1.5 minutes should be considered acceptable.

• | Bent connecting rod.