CONNECTING ROD SPECIFICATIONS
Distance between middle
connecting rod bore to
connecting rod bushing
bore
148.970 mm to 149.030
mm
Width of connecting rod
bearing bore at
connecting rod bushing
bore
21.940 mm to 22 mm
Connecting rod bearing
shell basic bore
51.600 mm to 51.614
mm
Allowable out-of-
roundness and taper of
basic bore
.020 mm
Allowable twist of
connecting rod bearing
bore to connecting rod
bushing bore over a
length of 100 mm
.100 mm
Allowable variation of
axial parallelism of
connecting rod bearing
bore to connecting rod
bushing bore over a
length of 100 mm
.045 mm
Allowable difference in
weight of complete
connecting rod of an
engine
2g
Connecting rod inner
bushing
30.018 to 30.024 mm
Connecting rod outer
bushing
32.575 mm to 32.600
mm
Connecting rod basic
bore
32.500 mm to 32.525
mm
Piston pin play in
connecting rod
.018 mm to .024 mm
Peak-to-Valley height
(Rz) of connecting rod
bushing on inside
5
Connecting rod bolt
thread
M8x1
STANDARD PROCEDURE - MEASURING
PISTON PROTRUSION
After replacing the pistons/connecting rods or
machining the engine block contact surface, it is then
necessary to measure the piston protrusion.
Measure protrusion between piston crown and cyl-
inder head contact surface without the head gasket
installed. The measurment must be carried out in
the direction of the piston pin in order to eliminate
piston rock.
(1) Measure piston protrusion at the two measur-
ing points (arrows) (Fig. 35).
Piston protrusion with new crankcase should be
0.38 - 0.62 mm.
REMOVAL
(1) Disconnect the negative battery cable.
(2) Remove the engine (Refer to 9 - ENGINE -
REMOVAL).
(3) Remove the cylinder head (Refer to 9 -
ENGINE/CYLINDER HEAD - REMOVAL).
(4) Remove the oil pan (Refer to 9 - ENGINE/LU-
BRICATION/OIL PAN - REMOVAL).
(5) Push back on the chain tensioner and remove
the oil pump chain from the oil pump.
(6) Remove the oil pump.
NOTE: Mark the connecting rod and connecting rod
bearing cap to each other at the inlet side.
(7) Remove the connecting rod bearing cap.
Fig. 35 MEASURING PISTON PROTRUSION
1 - PISTON PROTRUSION MEASUREMENT
9 - 42 ENGINE VA
PISTON & CONNECTING ROD (Continued)
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