3-80 ENGINE
• Remove the conrods and mark them to identify their respective
cylinders.
• Inspect the bearing surfaces for any signs of fusion, pitting,
burns, or flaws. If there is any damage, replace them with the
specified set of bearings.
CONROD-CRANK PIN BEARING SELECTION
• Place the plastigauge axially along the crank pin, avoiding the
oil hole, as shown.
• Tighten the conrod cap nuts to the specified torque, in two
stages.
NOTE:
When installing the bearing cap to the crank pin, make sure that
the number
1
on the conrod faces towards the intake side.
% Conrod cap nut
(Initial): 20 N
.
m (2.0 kgf
.
m, 14.5 lb-ft)
(Final): 35 N
.
m (3.5 kgf
.
m, 25.5 lb-ft)
" 09900-22301: Plastigauge
NOTE:
Never rotate the crankshaft or conrod when a piece of plastigauge
is installed.
• Remove the bearing caps, and measure the width of the com-
pressed plastigauge using the envelope scale. This measure-
ment should be taken at the widest part of the compressed
plastigauge.
# Conrod big end oil clearance
Standard: 0.032 – 0.056 mm (0.0013 – 0.0022 in)
# Conrod big end oil clearance
Service Limit: 0.080 mm (0.0031 in)
• If the oil clearance exceeds the service limit, select the speci-
fied bearings from the bearing selection table.
• Check the corresponding conrod I.D. code numbers (“1” or “2”)
2.
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