Arctic Cat 660 cc Service Manual page 62

19. Install the connecting rod cap nuts; then tighten
them to 3.3 kg-m (24 ft-lb).
NOTE: Leave in the assembled condition for
three minutes. DO NOT rotate or move the crank-
shaft.
20. Remove the connecting rod cap nuts; then
carefully remove the connecting rod caps and
bearings.
21. Using the scale supplied with the plastigauge,
verify that the oil clearance for each journal is
0.020-0.040 mm (0.00078-0.00157 in.) with a
maximum limit of 0.065 mm (0.00256 in.).
Remove the plastigauge; then clean the bearings
and connecting rod bearing journals.
22. Lubricate the connecting rod bearing and
connecting rod journal surfaces liberally with
engine oil.
23. Keeping the appropriate connecting rod caps with
their respective connecting rods and aligning the
"V" arrows as before, install the connecting rod
caps.
NOTE: Make sure the identification numbers
stamped on the side of the connecting rod caps
and the "V" arrow on the connecting rod caps are
facing the timing chain end of the crankcase. The
"V" arrow should be on the same side as the oil
squirter boss.
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2-50
MD1580
MD1581
Back to TOC
24. Install the connecting rod cap nuts; then tighten
them to 3.3 kg-m (24 ft-lb).
! CAUTION
Check that the oil venturi plug is not clogged. If it
is, clean it thoroughly; then install and tighten to
0.7 kg-m (5 ft-lb).
25. Install the two cylinder head dowel pins, a new
cylinder head gasket (never reuse an old head
gasket), and the cylinder head.
NOTE: Make sure the identification marking
"TOP" on the gasket is facing up.
Dowel
Pin
26. Apply engine oil to the eight cylinder head cap
screws and install the cap screws; then tighten
using the following procedure.
Torque kg-m
Step #1 2.8-3.3
Step #2 4.6-5.0
Step #3 Loosen All Cap Screws
Step #4 4.6-5.0
Step #5 5.8-6.3
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AO323A
Dowel
Pin
MD1578
ft-lb
20-24
33-36
Loosen All Cap Screws
33-36
42-45.5
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