Subaru 2009 IMPREZA, Service Manual

Page: 1149 / 3619

ME(H4DOTC)-91
Cylinder Block
MECHANICAL
D: ASSEMBLY
1) Apply engine oil to the surface of the connecting
rod bearings, and install the connecting rod bear-
ings on connecting rods and connecting rod caps.
2) Position each connecting rod with the side with a
side mark facing forward, and install it.
3) Attach the connecting rod cap and tighten it with
connecting rod bolt. Make sure the arrow on con-
necting rod cap faces the front during installation.
NOTE:
• Each connecting rod has its own mating cap.
Make sure that they are assembled correctly by
checking their matching number.
• When tightening the connecting rod bolts, apply
oil on the threads.
Tightening torque:
52 N·m (5.3 kgf-m, 38.4 ft-lb)
4) Install the oil ring upper rail, expander and lower
rail by hand.
5) Install the second ring and top ring using piston
ring expander.
NOTE:
Assemble so that the piston ring mark “R” faces the
top side of the piston.
E: INSPECTION
1. CYLINDER BLOCK
1) Check for cracks or damage. Use liquid pene-
trant tester on the important sections to check for
fissures. Check that there are no marks of gas leak-
ing or water leaking on gasket installing surface.
2) Check the oil passages for clogging.
3) Inspect the cylinder block surface that mates
with cylinder head for warping by using a straight
edge, and correct by grinding if necessary.
Warping limit:
0.025 mm (0.00098 in)
Grinding limit:
0.1 mm (0.004 in)
Standard height of cylinder block:
201.0 mm (7.91 in)
(1) Connecting rod bearing (5) Second ring Tightening torque:N·m (kgf-m, ft-lb)
(2) Connecting rod (6) Top ring T: 52 (5.3, 38.4)
(3) Connecting rod cap (7) Snap ring
(4) Oil ring (8) Side mark
ME-02985
(1)
(1)
(7)
(4)
(5)
(6)
(3)
T
(2)
(8)