CONNECTING RODS, PISTONS, RINGS & SLEEVES
Remove the Connecting Rods and Pistons as
Remove the cylinder head as described in
Remove the drain plug and drain the crankcase
Remove the oil pan and gasket.
NOTE: It is recommended to check crankshaft
bearing bolt torque on the main bearing and
connecting rod bolts anytime the oil pan is removed.
Check the main bearing and connecting rod bolt
torques (prior to teardown) as follows:
Using a direct reading torque wrench (Not a
"CLICKER" type) place the socket over the
bolt head and gently pull the wrench in the
tightening direction to remove slack.
Mark the bolt and rod with the marks in
For mains, mark the cap and the
Loosen bolts 1/4 turn. Tighten with a slow
steady motion and read the torque at the
moment the marks are once again aligned.
On the main bearing bolts if torque is found
to be below 155 Nm (115 lbf-ft), and cap is
not to be removed, back off 1/4 turn and
retorque to 155 Nm (115 Ibf-ft). Those at
155 Nm (115 Ibf-ft) or higher should be left
with marks aligned.
For connecting rod bolts if the torque of
both bolts is 175 Nm (1 30 Ibf-ft) or higher,
and rod is not to be removed, they may be
left with the marks aligned.
If the torque of either bolt is found to be less
than 150 Nm (110 Ibf-ft), the rod should be
removed and inspected.
If the torque of both connecting rod bolts is
found to be at least 150 Nm (110 Ibf-ft),
but either or both less than 175 Nm (130
Ibf-ft), the cap should be removed and the
If bearing distress is noted or bearings are not a tight fit
in rod and cap, new inserts should be used and the cap
reinstalled. If no bearing distress is noted, reinstall the
bearings and cap.
connecting rod removal, inspect the sleeves at the
upper end of the ring travel for the presence of a
ridge. This ridge must be removed with a fine emery
cloth and a carbon scraper before the piston is
removed. This prevents damage to the piston ring
lands during removal and also prevents damage to
new piston rings when installing the piston. When
removing a piston from the crankcase, do not allow
the piston skirt to strike the crankcase or the
connecting rod to strike the piston sleeve, as severe
damage to the sleeve could result.
Remove the connecting rod bolts from the rod
caps and remove the caps and bearing inserts
from the rod ends. Keep in order and observe
markings to prevent mismatching.
Push the connecting rod and piston to the top of
the cylinder and remove them from the top of the
crankcase with EXTREME CARE.
7. Crank the engine by hand and remove all of the
remaining pistons as outlined. Be sure to
replace each bearing cap on its respective
connecting rod after removal of the piston from
NOTE: It is advisable to wrap an oil-soaked cloth
around the crankshaft connecting rod bearing
journals to keep them as clean as possible. Wrap
the piston and connecting rod assemblies in clean
cloth also to protect them until installation.
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