TM 5-3805-258-24-2
ENGINE
DISASSEMBLY AND ASSEMBLY
CONNECTING ROD BEARINGS
REMOVE AND INSTALL CONNECTING ROD
BEARINGS
1219-10
Tools Needed
A
Plastigage
*
start by:
a) remove oil pump
b) remove oil pan plate
1. Turn the crankshaft until two pistons are at the
bottom center. Remove connecting rod caps
(1) from the two connecting rods. Remove the
lower half of the rod bearing from the rod
bearing cap.
2. Push the connecting rods away from the crank-
shaft. Remove the upper half of the rod bearing
from the connecting rod.
NOTE: Install the connecting rod bearings dry when
the clearance checks are made. Put clean engine oil
on the connecting rod bearings for final assembly.
3. Install the upper half of the rod bearing in the
connecting rod.
4. Install the lower half of the rod bearing in the
connecting rod cap.
NOTE: Be sure the tabs in the back of the connecting
rod bearings are in the tab grooves of the connecting
rod and cap.
5.
6.
7.
Use Plastigage (A) to check the connecting rod
bearing clearance.
Put Plastigage (A) on the connecting rod bear-
ing.
Put clean engine oil on the threads of the rod
bolts and seat surfaces of the nuts.
CAUTION
When connecting rod caps are installed, make
sure the number on the side of the cap is next to
and respective with the number on the side of
the connecting rod.
NOTE: Do not turn the crankshaft when Plastigage
(A) is in position.
CAUTION
Do not use an impact wrench to tighten the
nuts the additional 90°.
8. Install connecting rod cap (1). Install the nuts.
Tighten the nuts to a torque of 40 ± 4 N·m (30
± 3 lb.ft.). put a mark on each nut and the end
of each bolt. Tighten the nuts 90° more. Re-
move the connecting rod caps. Remove Plasti-
9.
10.
gage (A) and measure the width of the Plasti-
gage. The connecting rod clearance must be
0.076 to 0.168 mm (.0030 to .0066 in.) for new
bearings. The maximum clearance with used
bearings is 0.25 mm (.010 in.).
Install the connecting rod caps and tighten the
nuts as in Step 8.
Do Steps 1 through 9 for the remainder of the
connecting rod bearings.
end by:
a) install oil pan plate
b) install oil pump
5-142
