Piston, Piston Pin And Connecting Rod Assembly (4.0L); Connecting Rod Cap And Connecting Rod Bearing (4.0L) - Mazda B-Series 1997 Workshop Manual

ASSEMBLY
I ( 5.
Position the end gap of each ring as shown in the figure.
OIL RING
Piston, piston pin and connecting rod assembly
UPPER RAIL
TC)P RING
1. Remove any foreign material and oil from the connecting
rod journals and bearings.
OIL RING
2. Install the upper connecting rod bearings in the connect-
ing rods.
3. Apply a liberal amount of clean engine oil to the cylinder
walls, pistons, piston rings and conrlecting rod cap bolts.
OIL RING SECOND
LOWER RAIL
Caution
Be careful not to damage the! crankpin journals
~ B I 094-A 4 ~ ~ 0 ~ 3 - 1 3 0
when installing the piston assemblies.
4. Check the piston ring for proper end gap positioning.
5. Insert the piston assemblies into the cylinder block with
the indent on the top of the piston facing the front of the
engine. Use a piston installer tool (commercially avail-
able) to install.
4BUOB3-131
Connecting rod cap and connecting rod bearing
1.
Measure the connecting rod bearing oil clearances as
follows:
Caution
Do not rotate the crankshaft when measuring the
oil clearances.
Oil clearance must be measured with the connect-
ing rod in the BTDC position.
(1) Remove any foreign material and oil from the journals
and bearings.
(2) Install the connecting rod bearing into the connecting
rod cap.
(3) Position Plastigage atop the journals in the axial direc-
tion.
(4) Apply clean engine oil to the threads and seat faces of
the connecting rod cap bolts.
(5) Install the connecting rod cap.
(6) Tighten the connecting rod cap bolts.
Tightening torque:
25-32 N.m (2.5-3.3 kgfsm, 18-24 ft.lbf)