5_108.bk Page 139 Thursday, October 4, 2001 11:45 AM
REPAIR INSTRUCTIONS Cylinder Block Dowel Pins SPECIAL TOOL REQUIRED r
Flywheel Housing/Timing Cover Locating Pin Driver J 37712
3. Using a hammer, drive the pin into the block until the driver contacts the cylinder block. When the driver has made contact with the block, the dowel pin will be at the correct dimension above the block. 176
REMOVAL If it is necessary to remove the timing cover or flywheel housing locating dowel pins, do so as follows: 1. Securely clamp the pin with a pair of visegrip pliers. 2. While exerting an outward force, rotate pin back and forth until the pin works free from the hole. INSTALLATION Two precision-made dowel pins are used to locate the flywheel housing to the cylinder block. One dowel is round, the other is a blade type.
The dowels used for timing gear cover installation are similar except for the size. The smaller dowels are used for the timing cover. The larger dowels are used for the flywheel housing. Round Dowel Pin Installation Refer to Figure 176. 1. Insert round dowel pin (2) into the flywheel housing/timing cover locating pin driver J 37712 (1). 2. Position exposed end of dowel into the left dowel pin hole in the rear face of the cylinder block and in the upper left dowel pin hole on the front face of cylinder block.
Figure 176 — Round Dowel Pin Installation 1. Locating Pin Driver 2. Round Dowel Pin
3. Cylinder Block 4. Dowel Pin Hole
Blade-Type Dowel Pin Installation 1. Position the round end of the blade-type dowel pin into the right dowel pin hole in the rear face of the cylinder block. The blade of this pin must be aligned vertically with the block. 2. Position the round end of the blade-type dowel pin into the lower right pin hole in the front face of the cylinder block. The blade of this pin must be positioned approximately 39 degrees outboard relative to the vertical center line of the block. 3. Using a hammer, drive the dowel pin into the block until the shoulder of the pin is flush with the cylinder block surface.
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