Perform the following steps in order to conduct a compression test
for the L61.
- Conduct the following steps in order to check cylinder compression.
| 1.1. | Engine should be at room temperature. |
| 1.2. | Disconnect wiring from the ignition module. |
| 1.3. | Remove the spark plugs. |
| 1.4. | Throttle body valve should be wide open. |
| 1.5. | Battery should be at or near full charge. |
- For each cylinder, crank engine through four compression strokes.
- The lowest reading cylinder should not be less than 70 percent
of the highest.
- No cylinder reading should be less than 689 kPa (100 psi).
Important: The results of a compression test will fall into the following categories:
| | Compression builds up quickly and evenly to specified compression on
each cylinder. |
| | Compression is low on the first stroke, tends to build up on following
strokes, but does not reach normal. Compression improves considerably with
the addition of oil. |
| | Compression is low on the first stroke, does not tend to build up on
the following strokes, and does not improve much with the addition of oil.
Use approximately three squirts from a plunger-type oiler. |
