Lower Main Bearing Shell And Lower Thrust Plate - Install; Main Bearing Cap - Install - Mitsubishi S6R Series Service Manual

Chapter 7 ASSEMBLY OF BASIC ENGINE

1.7 Lower Main Bearing Shell and Lower Thrust Plate - Install

(1) Install the lower main bearing shell, aligning the lug
with the lug slot in the main bearing cap.
Note: Make the crush heights even.
(2) Apply an even coat of clean engine oil to the sliding
surfaces of lower main bearing shells.
(3) Install the lower thrust plates aligning with the dowel
pins to the rearmost main bearing cap.
Note: Install the lower thrust plates so that the oil groove fac-
es outer side of the cap.

1.8 Main Bearing Cap - Install

Be sure to tighten the bolts in the specified sequence
when installing the main bearing cap bolts.
(1) Make sure that the main bearings and thrust plates
installed to main bearing caps are evenly coated with
clean engine oil.
(2) Install the main bearing caps so that their stamp num-
bers are arranged in numerical order from engine front
to rear, and all lugs are aligned on the same side, which
shows the embossed mark of "FRONT" faces toward
the engine front.
(3) Apply oil to the main bearing cap bolts and washers and
hand tighten them.
(4) Tap the main bearing caps with a soft-head hammer
evenly to install them in position.
(5) Tighten temporary the main bearing cap bolt except for
rearmost one to the half of specified torque in the illus-
trated order.
(6) Tighten the main bearing cap bolts and side bolts
except the rearmost ones to the specified torque in the
specified sequence shown in the illustration.
(7) Hand tighten the rearmost cap bolts and side bolts to
make the rearmost main bearing be lightly seated.
Measure the crankshaft end play in this condition.
7-6
Lower main bearing
Lower thrust plate
Dowel pin
Oil groove
Lower Main Bearing and lower Thrust Plates - Install
"FRONT" mark
Main Bearing Cap - Install
Tighten to the specified torque in the numerical order
in two steps. [Wet]
First time:
245 ± 12.3 N·m
{25 ± 1.25 kgf·m}
[181 ± 9.1 lbf·ft]
3 1 2 4
Tightening Sequence of Main Bearing Cap Bolts
Lug groove
Lower thrust plate
Main bearing cap
Main bearing cap
Second time:
490 ± 24.5 N·m
{50 ± 2.5 kgf·m}
[361 ± 18.1lbf·ft]
4 1 3 2
or