Sealey VS660 Instruction Manual
![Sealey VS660 Plug manual cover](/images/gFFzxrCQnODSHJUIGCGPjuIW/thumbs/thumb175x175.webp)
The Sealey VS660 Plug is used for testing the compression of petrol engines. It helps in diagnosing engine issues by measuring the pressure in the cylinders.
Ensure the engine is off. Remove the spark plug from the cylinder you want to test. Attach the Sealey VS660 Plug in place of the spark plug and connect the gauge to the plug.
Check that all connections are secure and that the plug is properly seated in the engine. Inspect the gauge for any visible damage and ensure it's functioning correctly.
Calibration should be checked annually or whenever you suspect the readings are inaccurate to ensure reliable measurements.
Regularly clean the connectors and the body of the plug to prevent dirt buildup. Store in a dry place to avoid moisture damage.
No, the Sealey VS660 Plug is designed specifically for petrol engines. Using it on diesel engines could result in inaccurate readings or damage.
Ensure the engine is at operating temperature and the battery is fully charged. Check all connections for tightness and repeat the test.
Yes, the plug is designed to withstand engine temperatures, but caution is advised to prevent burns. Use heat-resistant gloves if necessary.
Perform the test with a fully charged battery, ensure all connections are secure, and test each cylinder twice to verify consistency.
Store the Sealey VS660 Plug in a cool, dry place, away from direct sunlight and moisture to prolong its lifespan and maintain accuracy.