Chevrolet 70 1969 Series, Руководство по ремонту

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E N G IN E 6-25
sea tin g of bearing cap if ends should exten d
b e tw e e n cap a n d cylinder block.
INSTALLING CRANKSHAFT AND BEARINGS
Thoroughly clean bearings, crankshaft journals bearing
bores in block and oil holes in crankshaft to remove all
cuttings and abrasive material.
1. Place crankshaft bearing upper halves in respective
bearing bores in crankcase, then apply engine oil on
each bearing. Apply sealer on cylinder block area
contacted by crankshaft rear bearing cap (shaded area
in fig. 37).
2. Lower crankshaft into place in crankcase, and with
bearing lower halves in place, position all crankshaft
bearing caps. Each cap, except rear, has the word
" F R O N T ” cast at front edge of cap, and caps are
numbered from front to rear with numerals 1, 2, 3,
and 4 (fig. 49).
3. Lubricate all bearing cap bolts with S.A.E. number
10 engine oil. Insert the 9/16 - 12 bolts into holes in
bearing caps and start bolts into threads in cylinder
block.
4. Insert two 1/2 - 13 rear bearing cap bolts and start
threads into block.
5. Using torque wrench, tighten the 9 /1 6 - 12 bearing
cap-to-cylinder block bolts to 130-140 foot-pounds.
6. Tighten the two 1/2 - 13 rear bearing cap bolts to 55
to 65 foot-pounds with torque wrench. Turn cran k­
shaft to check for binding in bearings, crankshaft
must turn freely with bearing cap bolts properly tor-
qued.
7. Dip the two bearing cap side seals in Diesel fuel oil,
then insert one seal into groove at each side of rear
bearing cap. Figure 38 shows the correct position
when installing side seals. N ote that the end of seals
which is chamfered goes toward top (bearing end) of
cap, and narrow edge of side seals must mate with
narrow side of grooves in cap.
1 Side Seal
2 Crankshaft Oil
Seal
3 Rear Bearing
Cap
4 Bearing Cap
Rear Bolts
5 Bolt Hole Plugs
6
Cylinder Block
CUT O F F ENDS O F P A CKIN G
CLEAN LY AND FLUSH W ITH SURFACE
POINT "A "
DIP SIDE SEALS (1) IN DIESEL
O IL AND IN SERT IN TO G R O O V E
IN C A P (3) AFTER C A P IS
INSTALLED. CHAMFER O N END
O F SEALS M UST BE LO CATED
AT POINTS " A ”
IN SERT P LU G S (5) W ITH
C A V IT Y T O W A R D BOLTS
Figure 3 7 — Sectional V ie w at C r a n k s h a ft R e ar B e a r in g S e a ls
1. Side Seal 4. Bearing Cap
2. Crankshaft Oil Rear Bolts
Seal 5. Bolt Hole
3. Rear Bearing Piugs
C ap 6. Cylinder Block
Figure 36 — Installing Crankshaft Rear Bearing Oil Seal with Special Tool
Figure 38 — Bearing C a p Side Seal Position