Industrial 1.6L General Information 0-5
Engine ID Location
To help identify the engine and its serial number, an
identification label is affixed to the top of the camshaft
housingcover.
FASTENERS
Metric Fasteners
The 1.6L engine is dimensioned in the metric system.
Most metric fasteners are very close in diameter to well
known fasteners in the English, inch system. Replace
fasteners with those of the same nominal diameter,
thread pitch, and strength.
A number marking identifies the OE metric fasteners
except cross-recess head screws. The number also
indicates the strength of the fastener material. A
Posidrive R or Type 1A cross-recess identifies a metric
cross-recess screw. For best results, use a Type 1A
cross-recess screwdriver, or equivalent, in Posidrive R
recess head screws.
General Motors Engineering and North American
Industries have adopted a portion of the ISO-defined
standard metric fastener sizes. The purpose was to
reduce the number of fastener sizes used while retain-
ing the best thread qualities in each thread size. For
example, the metric M6.0 X 1 screw with nearly the
same diameter and 25.4 threads per inch replaced the
English 1/4-20 and 1/4-28 screws. The thread pitch is
midway between the English coarse and fine thread
pitches.
The most commonly used metric fastener strength
property classes are 9.8 and 10.9. The class identifica-
tion is embossed on the head of each bolt. The English,
inch strength classes range from grade 2 to grade 8.
Radial lines are embossed on the head of each bolt in
order to identify the strength class. The number of lines
on the head of the bolt is 2 lines less than the actual
grade. For example, a grade 8 bolt will have 6 radial
lines on the bolt head. Some metric nuts are marked
with a single digit strength identification number on the
nutface.
The correct fasteners are available through PSI. Many
metric fasteners available in the aftermarket parts
channels are designed to metric standards of countries
other than the United States, and may exhibit the
followingdefects:
• Lower strength
•No numbered head marking system
•Wrong thread pitch
The metric fasteners on PSI products are designed to
new, international standards. Following are the com-
mon sizes and pitches, except for special applications:
•M6 X 1
•M8 X 1.25
•M10 X 1.5
•M12 X 1.75
The engine serial number is also stamped into the left
side of the cylinder block near the engine flywheel. The
stamp contains the engine model number (i.e. 1.6L,
3.0L, 5.7L, etc.) and a serial number which identifies
the engine from other GM Powertrain engines provided
by Power Solutions, Inc. The engine model and serial
number are required when seeking information con-
cerning the engine and/or ordering replacement
service parts.
80300001
80300002
