6A2-12 VS ENGINES, GASOLINE
133 ; 134
130. Crankshaft
131. Rear Seal
132. Rear Main Bearing Cap
133. Main Bearing' Cap
134. Bolt
135. Lower Main Bearing Insert
136. Upper Main Bearing Insert
F9332
CLEANING, INSPECTION^ A N DItEm U R
; parts, will be needed along with various bristle, brushes
and a gasket scraper A source,of compressed air will
be helpful in the cleaning operations:
Precision measuring ! tools will be required for the
inspection procedure. These include: micrometers, cyl
inder bore gage, feeler gages, dial indicator set, etc.
The inspection work, performed with proper methods
and tools, is most important; The rebuilt engine cannot
be expected to perform properly if parts worn beyond
acceptable limits are reused.
BLOCK
Clean
1. Block in solvent.
£ Block gasket surfaces.
3. Cylinder bores. !; v
4.
5. Scale deposits from the coolant passages (figure
■\ so).
L*
I n s p e c t
,1, All expansion plugs for poor fit or leakage.
2. Valve lifter bores for deep scratches and varnish
deposits.. . ^
3. Block for cracks.
• Cylinder walls. N
• Coolant jackets.
• Main bearing webs.
• Engine mount bosses.
4. Main bearing bores and main bearing caps. ;
• All main bearing bores should be round and
Uniform in inside diameter (ID) at all bearing
supports.
• The area where the main bearing inserts con
tact the main bearing bore should be smooth.
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