Page 162
REPAIR INSTRUCTIONS
Crankshaft Dowel Pin Replacement
[212 HA]
All E-Tech™ engine crankshafts are equipped
with a blade-type flywheel-to-crankshaft dowel
pin installed in the rear flange directly opposite
the manufacturing locator hole. Hole sizes are as
follows:
Manufacturing locator hole — approximately
1/2 inch (12.7 mm) in diameter and 3/8 inch
(9.52 mm) deep; used in the manufacturing
process
Flywheel dowel pin hole — approximately
9/16 inch (14.29 mm) in diameter by 7/8 inch
(22.23 mm) deep
All new service replacement crankshafts, short
blocks or basic engines will have a dowel pin in
the crankshaft rear flange. In nearly all cases, the
flywheel will already have a hole in it to accept the
dowel pin. If an earlier version flywheel or torque
converter drive flange without a dowel pin hole is
used for replacement, it must be reworked.
If it is necessary to rework the flywheel or torque
converter drive flange, two holes must be added
using a 19/32-inch drill bit. One hole is for the
dowel pin and another directly opposite the first
hole is to maintain balance of the flywheel/torque
converter drive flange.
Refer to Figure 153.
153
Figure 153 — Dowel Pin Hole Dimensions (Flywheel or
Torque Converter Drive Flange)
DOWEL PIN REMOVAL
To remove the crankshaft dowel pin:
1. Securely grip the dowel pin with locking
pliers.
2. Rotate the dowel pin back and forth while
exerting outward pressure until the pin is
removed.
5_106_00.bk Page 162 Friday, August 4, 2000 11:17 AM
BDC for engine manuals and specs
