TM 5-3805-290-23-1
ENGINE TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
0010 00
FINDING TOP-CENTER POSITION FOR NO. 1 PISTON - CONTINUED
9.
Slowly rotate crankshaft clockwise until mark (2) on damper or pulley, which was made in step 8, aligns with tip of
pointer (1). No. 1 piston is now at top-center on compression stroke.
10.
Install valve mechanism cover (WP 0024 00).
11.
Remove temporary pointer (1) from front of front
cover.
427-B0650
EXCESSIVE ENGINE OIL CONSUMPTION INSPECTION
0010 00
1.
Check for leakage at seals at each end of crankshaft (WP 0148 00 and WP 0149 00).
2.
Look for leakage at gasket for engine oil pan (WP 0157 00) and all lubrication system connections.
3.
Look for any engine oil that may be leaking from crankcase breather. This can be caused by combustion gas leakage
around pistons. A dirty crankcase breather will cause high pressure in crankcase A dirty crankcase breather will cause
gaskets and seals to leak. Clean or replace breather as necessary (WP 0024 00).
N OT E
Engine oil that is leaking into the combustion area of the cylinders can be the cause of blue smoke. There
are several possible ways for engine oil to leak into the combustion area of the cylinders:
Leaks between worn valve guides and valve stems.
Worn components or damaged components (pistons, piston ring, or dirty return holes for
the engine oil).
Incorrect installation of the compression ring and/or the intermediate in.
4.
If any of these noted conditions are suspected, replace engine (WP 0145 00).
5.
Look inside turbocharger for leaking seal rings in the turbocharger shaft (WP 0165 00).
6.
Check for overfilled crankcase (TM 5-3805-290-10).
