HOME closed on the valve seat, turn the engine an additional 1/4 turn. 11. Repeat procedure on rear cylinder. 7. Slowly continue to turn the engine an additional 1/8th turn. The front cylinder is now close to TDC. After installing spark plugs, be sure that throttle plate is in the closed position before starting the engine. NOTE 8. To keep the engine from turning over when air pressure is applied to the cylinder, engage transmission in fifth gear and lock the rear brake. Hold engine with crankshaft rotating wrench if needed. DIAGNOSING SMOKING ENGINE OR HIGH OIL CONSUMPTION Perform 3.6 TROUBLESHOOTING, Compression Test or 3.6 TROUBLESHOOTING, Cylinder Leakage Test as described.
If further testing is needed, remove suspect head(s) and inspect for the following: NOTE Before performing the cylinder leakage test, verify that the tester itself is free from leakage to obtain the most accurate test results. Apply a soap solution around all tester fittings. Connect the cylinder leakdown tester to the compressed air source and look for any bubbles that would indicate leakage from the tester. Check Prior to Cylinder Head Removal 1. Crankcase overfilled. 9. Following the manufacturer's instructions, perform a cyl- inder leakage test on the front cylinder. Make a note of the percent of leakage. Leakage greater than 15% indic- ates internal engine problems. 2. Oil carryover. 3.
Breather hose restricted. 4. Restricted oil filter. Check After Cylinder Head Removal 10. Listen for air leaks at throttle body, exhaust pipe, head gasket and crankcase breather. Air escaping through the throttle body indicates a leaking intake valve. Air escaping through the exhaust pipe indicates a leaking exhaust valve. 1. Valve guide seals. 2. Valve guide to valve stem clearance. NOTE 3. Gasket surface of both head and cylinder. If air is escaping through valves, measure and adjust valve lash as required. See 1.25 VALVE LASH . 4. Cylinder head casting's porosity allowing oil to drain into combustion chamber. 5. Piston/ring failure. 2009 VRSC Service: Engine 3-15