Pontiac Engine >> REVISED MAIN BEARING BOLT ON 1.6L
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Pontiac Engine >> REVISED MAIN BEARING BOLT ON 1.6L
Revised Main Bearing Bolt On
1988-93 GM 1.6L VIN 6 Engines
AERA members have reported revised main bearing bolts on 1988-93 GM
1.6L VIN 6 engines. The service manual for this Pontiac Lemans
engine indicates the use of a torque to yield main bearing bolt and
also recommends using new bolts anytime they are removed.
Recently, obtaining those new bolts revealed a difference in design
which indicated they were not a torque to yield bolt. The original
design bolt has a shank-down portion and was easily identified. The
replacement bolt, Part #11503649, has been revised and is no longer
a torque to yield bolt. This revised bolt is a straight shank bolt
and no longer requires replacement, unless it is damaged or
stretched.
The torque value for the straight shank bolt is also revised, it
should be 44-46 ft. lbs. The torque to yield bolt has a torque value
of 44-46 ft. lbs. plus an additional 90^ turn.
The AERA Technical Committee
November 1996 - TB 1395
##END##
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