Toyota 4-Runner 1985 Repair Manual page 84

A
B
c
ENGINE MECHANICAL - Cylinder Block
EM-55
o
10 mm (0.39 in.)
..- Front
55mm
~1
(2.17 in.) .
(1)
55mm
i
-~------'- (2.17 in.)
CD
Thrust Direction
@
Axial Direction
INSPECTION OF CYLINDER BLOCK
1. REMOVE GASKET MATERIAL
Using a gasket scraper, remove all gasket material from
cylinder block surfaces.
2. CLEAN CYLINDER BLOCK
Using a soft brush and solvent, clean the block.
3. INSPECT CYLINDERS
Visually inspect cylinders for vertical scratches. If deep
scratches are present, rebore all four cylinders.
4. MEASURE CYLINDER BORE
Using a cylinder micrometer, measure the cylinder bore at
positions A, Band C in the thrust and axial directions. If
any of the following measurements is not within specifica-
tions rebore all four cylinders.
(a) Cylinder diameter greater than maximum.
Standard size piston
Maximum diameter: 92.03 mm (3.6232 in.)
Oversized piston (OIS 0.50)
Maximum diameter: 92.53 mm (3.6429 in.)
Oversized piston (0/5 1.00)
Maximum diameter: 93.03 mm (3.6626 in.)
(b) Difference between measurements A, Band C is
greater than the taper limit.
Taper limit: 0.01 mm (0.0004 in.)
(c) Difference between the thrust and axial measure-
ments is greater than the out-of-round limit.
Out-of-round limit: 0.02 mm (0.0008 in.)
5. REMOVE CYLINDER RIDGE
If wear is less than 0.2 mm (0.008 in.), use a ridge reamer
to machine the top of the cylinders.