Toyota TERCEL 1985 Repair Manual page 77

EM-46 ENGINE MECHANICAL - Cylinder Block
DISCONNECT CONNECTING ROD FROM PISTÓN
3.
(a) Using SST, press the pistón pin out of the pistón.
SST 0 9 2 2 1 - 2 5 0 1 8
NOTE:
• The pistón and pin are a matched set.
• Arrange the pistons, pins, rings, connecting rods and
bearings in correct order only.
INSPECTION OF PISTÓN AND CONNECTING
ROD ASSEMBLIES
1. CLEAN PISTÓN
(a) Scrape carbón from the pistón top.
(b) Using a groove cleaning tool or broken ring, clean the
ring grooves.
(c) Using solvent and brush, thoroughly clean the pistón.
CAUTION:
2. INSPECT PISTÓN DIAMETER AND OIL CLEARANCE
(a)
right angles to the pistón pin hole center line, 5 mm
O/S 0.50
O/S 0.75
O/S 1.00
(b)
Oil clearance:
If the oil clearance is not within specification, replace all
four pistons. If necessary, rebore all four cylinders or rep-
lace the cylinder block.
Do not use a wire brush.
Using a micrometer, measure the pistón diameter at
(0.20 in.) from the lower edge of oil ring groove.
Standard diameter
Size Diameter
STD
77.39 - 77.42 (3.0468 - 3.0480)
77.89 - 77.92 (3.0665 - 3.0677)
78.14 - 78.17 (3.0764 - 3.0776)
78.39 - 78.42 (3.0862 - 3.0874)
Measure the cylinder bore diameter in the thrust
directions (See page EM-45) and subtract the pistón
diameter measurement from the cylinder bore
diameter.
0.10 - 0.12 mm
(0.0039 - 0.0047 in.)
mm (in.)