Cobalt L4-2.4L (2007)
7. Install the remaining parts of the J 43649 to the cylinder head.
8. Remove the spark plugs.
9. Install an air hose adapter into the spark plug hole.
10. Attach an air hose to the adapter
11. Using the compressed air, pressurize the cylinder to 690 kPa (100 psi).
12. Compress the valve spring using the J 43649.
