• | Engine flywheel contacting the splash shield--reposition the splash shield. |
• | Loose or broken crankshaft balancer or drive belt pulleys--tighten or replace the components as necessary. |
• | Excessive piston to bore clearance--replace the piston. |
• | Bent connecting rod--replace the connecting rod. |
• | 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. |