Inspection And Repair Of Piston And Connecting Rod Assemblies; Clean Piston; Inspect Piston Diameter And Oil Clearance - Toyota 1PZ Repair Manual

ENGINE MECHANICAL
INSPECTION AND REPAIR OF PISTON AND
CONNECTING ROD ASSEMBLIES
1.

CLEAN PISTON

(a) Using a gasket scraper, remove the carbon from the
piston top.
(b) Using a groove cleaning or broken ring, clean the
piston ring grooves.
(c) Using solvent and a brush, thoroughly clean the
piston.
NOTICE: Do not use a wire brush.
2.

INSPECT PISTON DIAMETER AND OIL CLEARANCE

HINT: There are three sizes of the standard piston diam-
eter, marked " 1 " , "2" and "3" accordingly. The mark is
stamped on the top of the piston.
(a) Using a micrometer, measure the piston diameter at
right angles to the piston pin center line, at the
indicated distance from the piston head.
Distance:
1PZ and 1 HZ
1HD-T
Piston diameter:
STD Mark " 1 " 93.95-93.96 mm
O/S 0.50
Cylinder Block
58.6 mm (2.3071 in.)
65.7 mm (2.5866 in.)
(3.6988-3.6992 in.)
Mark "2" 93.96 - 93.97 mm
(3.6992-3.7000 in.)
Mark "3" 93.97-93.98 mm
(3.7000-3.7000 in.)
94.45 - 94.48 mm
(3.7185-3.7197 in.)
EM-97