| Step | Action | Values | Yes | No |
|---|
| 1 | Does the engine knock when it is cold and continue for 2-3 minutes or does the knock increase with torque? | | Go to Step 2 | System OK |
| 2 | Inspect the flywheel. Is the flywheel contacting the splash shield? | | Go to Step 3 | Go to Step 4 |
| 3 | Reposition the splash shield. Is the repair complete? | | Go to Step 1 | |
| 4 | Inspect the balancer and the drive pulleys. Is either the balancer or the drive pulleys loose or broken? | | Go to Step 5 | Go to Step 6 |
| 5 | Tighten or replace the balancer or the drive pulleys. Is the repair complete? | | Go to Step 1 | |
| 6 | Inspect the piston-to-bore clearance. Is the clearance greater than the specified value? | 0.040 mm (0.0016 in) | Go to Step 7 | Go to Step 8 |
| 7 | Bore the cylinder and hone to size. IMPORTANT: Cold engine piston knock usually disappears when the cylinder is grounded out. Cold engine piston knock, which disappears in about 1.5 minutes, is considered acceptable. Replace the piston. Is the repair complete? | | Go to Step 1 | |
| 8 | Inspect the connecting rod. Is the connecting rod bent? | | Go to Step 9 | System OK |
| 9 | Replace the connecting rod. Is the repair complete? | | Go to Step 1 | |
| IMPORTANT |
|---|
| Cold engine piston knock usually disappears when the cylinder is grounded out. Cold engine piston knock, which disappears in about 1.5 minutes, is considered acceptable. |
Engine Knocks Cold and Continues for Two-Three Minutes and/or Knock Increases with Engine Torque
