Page 808 - 2006 HARLEY FLSTCI SERVICE MANUAL

CYLINDER LEAKAGE 3-21 2006 Softail: Engine

Repeat procedure on rear cylinder. closed position before starting the engine. HIGH OIL CONSUMPTION COMPRESSION TEST pect head(s) and inspect for the following: Oil tank overfilled. Breather hose restricted. Restricted oil filter. Check After Cylinder Head Removal Oil return passages for clogging. Valve guide seals. Valve guide to valve stem clearance. Gasket surface of both head and cylinder. combustion chamber.

NOTE If air is escaping through valves, check for correct push rod NOTE After installing spark plugs, be sure that throttle plate is in the DIAGNOSING SMOKING ENGINE OR or TEST as described. If further testing is needed, remove sus- Check Prior To Cylinder Head Removal Cylinder head casting’s porosity allowing oil to drain into O-ring damaged or missing from oil pump/crankcase

length. 8. Perform 1. Oil carryover. 2. 3. 4. 1. 2. 3. 4. 5. 6. junction.

pressed air to the cylinder at a controlled pressure and volume
blown head gaskets. The cylinder leakage tester applies com-
The cylinder leakage test will pinpoint engine problems includ-
Use CYLINDER LEAKDOWN TESTER (Part No. HD-35667-
A) and 12 mm adapter and follow the specific instructions
ing leaking valves, worn, broken or stuck piston rings and
and measures the percent of leakage from the cylinder.
CYLINDER LEAKAGE TEST

supplied with the tester. The following are some general instructions that apply to Har- ley-Davidson V-twin engines: Run engine until it reaches normal operating tempera- Stop engine. Clean dirt from around spark plugs and remove the spark plugs. Remove the air cleaner and set the throttle to the wide open position. The piston in the cylinder being tested must be at top dead center of compression stroke (both valves closed) during the test. 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. NOTE Before performing the cylinder leakage tes

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