Mercury 305 CID, Руководство по обслуживанию

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3A-64 - ENGINES 90-823225--1 1096
3. Carefully lower crankshaft into place. Be careful
not to damage bearing surface.
4. Check clearance of each main bearing, following
procedure outlined under “Main Bearings.” If
bearing clearances are satisfactory, apply engine
oil to journals and bearings.
5. Install main bearing caps. Torque bolts to 80 lb.
ft. (109 N·m). When tightening rear main bearing
cap, follow procedure outlined under “Main Bear-
ings.”
6. Check crankshaft end play as outlined.
7. Install rear main seal retainer and seal. Torque
fasteners to 135 lb. in. (15 N·m).
8. Check clearance for each connecting rod bear-
ing, following procedure under “Connecting Rod
Bearings.” If bearing clearances are satisfactory,
apply engine oil to journals and bearings.
9. Install rod caps and torque nuts to 45 lb. ft.
(61 N·m).
10. Turn crankshaft so mark on timing sprocket or
gear is facing camshaft.
11. Install as outlined:
a. Timing chain and sprocket or gear on cam-
shaft -align marks with crankshaft.
b. Timing chain/gear cover.
c. Oil pump and baffle.
d. Dipstick tube and oil pan.
e. Spark plugs.
f. Torsional damper and crankshaft pulley.
g. Water pump.
h. Belts.
i. Flywheel and drive coupler/plate.
j. Flywheel housing.
k. Starter.
12. Install new oil filter. Fill crankcase with oil.
Timing Chain and Sprocket
or Timing Gears
Left-hand (standard) and right-hand (opposite) rota-
tion engines.
Removal
1. Remove torsional damper, oil pan and crankcase
front cover as outlined.
2. Turn crankshaft until timing marks on crankshaft
and camshaft sprockets are in alignment as
shown.
NOTE: Flat lifter timing gear is shown. Roller lifter
gears have similar timing marks.
72376
a - Timing Marks Aligned
b - Locating Pin
b
a
Standard (LH) Rotation Shown
3. Remove camshaft gear or sprocket and timing
chain. (If gear or sprocket does not come off
easily, a light tap on the lower edge of the gear
or sprocket, using a plastic mallet, should dis-
lodge it.)
4. If crankshaft sprocket or gear requires replace-
ment, remove as outlined.
Cleaning and Inspection
1. Clean all parts in solvent and dry with com-
pressed air.
2. Inspect timing chain for wear and damage.
3. Inspect sprockets for wear and damage.
4. Inspect timing gears for worn and damaged
teeth.
5. Inspect camshaft gear-to-cylinder block contact
surfaces for damage.