Subaru Legacy 2004 Service Manual page 1190

E: INSPECTION
1. CYLINDER BLOCK
1) Visually check for cracks and damage. Especial-
ly, inspect the important parts by means of red lead
check.
2) Check the oil passages for clogging.
3) Inspect the crankcase 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)
2. CYLINDER AND PISTON
1) The cylinder bore size is stamped on the cylinder
block's front upper surface.
NOTE:
• Measurement should be performed at a temper-
ature of 20#C (68#F).
• Standard sized pistons are classified into two
grades, "A" and "B". These grades should be used
as guide lines in selecting a standard piston.
Cylinder Block
Standard diameter:
A: 92.005 — 92.015 mm (3.6222 — 3.6226 in)
B: 91.995 — 92.005 mm (3.6219 — 3.6222 in)
#5
#4
#3
#2
#1
(A) Main journal size mark
(B) Cylinder block (RH) $ (LH) combination mark
(C) #1 cylinder bore size mark
(D) #2 cylinder bore size mark
(E) #3 cylinder bore size mark
(F) #4 cylinder bore size mark
2) How to measure the inner diameter of each cyl-
inder:
Measure the inner diameter of each cylinder in both
the thrust and piston pin directions at the heights as
shown in the figure, using a cylinder bore gauge.
NOTE:
Measurement should be performed at a tempera-
ture of 20#C (68#F).
Taper:
Standard
0.015 mm (0.0006 in)
ME(H4DOTC)-79
(A) (B)
(F)
(D)
(E) (C)
MECHANICAL
ME-00170