Piston Noises
| Step | Action | Yes | No |
|---|---|---|---|
| 1 | Are any of the following noises heard: a sharp double knock when the engine is idling, a light ticking with no load on the engine, or a slapping noise when the engine is cold? | Go to Step 2 | System OK |
| 2 | Inspect the piston pin and the bushing. Is the piston pin or the bushing worn or loose? |
Go to Piston, Connecting Rod, and Bearing Replacement | Go to Step 3 |
| 3 | Inspect the piston. Is the piston broken or cracked? |
Go to Piston, Connecting Rod, and Bearing Replacement | Go to Step 4 |
| 4 | Inspect the connecting rods. Is there a misaligned connecting rod? |
Go to Piston, Connecting Rod, and Bearing Replacement | Go to Step 5 |
| 5 | Inspect the piston position. Is the piston 180 degrees out of position? |
Go to Piston, Connecting Rod, and Bearing Replacement | System OK |