Diagnosing Smoking Engine Or High Oil Consumption - Buell 2009 XB Series Service Manual

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7. Refer to Table 3-17. Listen for air leaks at induction intake,
exhaust and head gasket.
NOTE
If air is escaping through valves, check push rod length.
8. Repeat procedure on rear cylinder.
NOTE
After completing the compression test(s), make sure that the
throttle plate is in the closed position before starting engine.
Engine will start at an extremely high RPM if throttle plate is
left open.
Table 3-17. Air Leakage Test
AIR LEAK LOCATION
Throttle body intake
Exhaust pipe
Head gasket
3-8 2009 XB Service: Engine
POSSIBLE CAUSES
Intake valve leaking.
Exhaust valve leaking.
Leaking gasket.
DIAGNOSING SMOKING ENGINE OR HIGH
OIL CONSUMPTION
Perform the Compression Test. See
Test.
If further testing is needed, remove the suspect cylinder heads
and inspect the following:
Oil level
Valve guide seals
Valve guide-to-valve stem clearance
Gasket surface of both the cylinder head and the cylinder
Piston ring wear
3.3 ENGINE, Compression