Remove the spark plugs, valve cover and valve cover gasket.
Number the rocker arms and valves from #1 to #8, starting at the front of the engine.
- The Triumph Spitfire is a classic British sports car that requires regular tune ups and adjustments to maintain peak performance.
- Number the rocker arms and valves from #1 to #8, starting at the front of the engine.
Rotate the engine with a 1 13/16-inch socket and 3/4-inch breaker bar until the #1 valve is fully open and just starting to close. Adjust the #8 valve to .010 clearance with a 1/2-inch wrench and screwdriver.
- Rotate the engine with a 1 13/16-inch socket and 3/4-inch breaker bar until the #1 valve is fully open and just starting to close.
Rotate the engine with the 1 13/16-inch socket and 3/4-inch breaker bar until the #2 valve is fully open and just starting to close. Adjust the #7 valve to .010 clearance.
Adjust the valves from front to rear using the “rule of nines.” The “rule of nines” is: 9 - (# of the valve fully compressed) = the # of the valve to adjust. For example, when valve #3 is in position, it is time to adjust valve #6 (9 - 3 = 6).
Repeat Step 6 until all valves have been adjusted. Replace the spark plugs, valve cover and valve cover gasket.
Petroleum jelly can be used as a gasket compound so that you can reuse the valve cover gasket several times before replacing it. Use a fender cover or blanket to protect the car’s finish when working on the engine.
Always rotate the engine clockwise. Rotating the motor counterclockwise will result in inaccurate valve adjustments.