Knocks Cold and Continues For 2-3 Minutes Increases W/Torque

^ Flywheel contacting splash shield. Reposition splash shield.

^ Loose or broken balancer or drive pulley. Tighten, or replace as necessary.

^ Excessive piston to bore clearance. Replace piston.

^ Bent connecting rod.

NOTE: Cold engine piston knock usually disappears when that cylinders ignition is grounded out. Cold engine piston knock which disappears in 1.5 minutes should be considered acceptable.