Service manual

181 CID (3.0L) 4 CYLINDER GM ENGINE
SERVICE MANUAL NUMBER 26
90-861329--1 MARCH 1999 Page 3A-55
Crankshaft
Removal
1. Remove engine from boat.
2. Drain crankcase oil.
3. Remove as outlined:
a. Starter.
b. Flywheel housing.
c. Drive coupler and flywheel.
d. Belts.
e. Water pump.
f. Crankshaft pulley and torsional damper.
g. Spark plugs.
h. Oil pan and dipstick tube.
i. Oil pump.
j. Timing chain cover.
4. Turn crankshaft to align timing mark with camshaft mark.
5. Remove camshaft sprocket.
6. Remove rear main seal and retainer.
7. Ensure all bearing caps (main and connecting rods) are marked so they can be rein-
stalled in their original locations.
8. Remove connecting rod bearing caps, then push piston and rod assemblies toward
heads.
9. Remove main bearing caps and carefully lift crankshaft out of cylinder block.
10. Remove crankshaft gear as shown.
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11. If new main and/or connecting rod bearings are to be installed, remove main bearing
inserts from cylinder block and bearing caps, and/or connecting rod bearing inserts from
connecting rod and caps. Install new bearings following procedures outlined.
Index