Measure Clearance Between Piston Groove And Piston Ring; Piston Diameter - Toyota 22R-E Service Manual

EG1–60
ENGINE – ENGINE MECHANICAL

Piston diameter:

STD Mark "
91.975 – 91.985 mm
(3.6211 – 3.6214 in.)
Mark "2'
91.985 – 91.995 mm
(3.6214 – 3.6218 in.)
Mark '3"
91.995 – 92.005 mm
(3.6218 – 3.6222 in.)
0/S 0.50
92.475 – 92.505 mm
(3.6407 – 3.6419 in.)
1.00
92.975 – 93.005 mm
(3.6604 – 3.6616 in.)
(b) Measure the cylinder bore diameter in thrust direc–
tions (See page EG1–56) and subtract the piston di–
ameter measurement from the cylinder bore diameter
measurement.
Piston clearance: 0.015 – 0.035 mm
(0.0006 – 0.0014 in.)
If not within specification, replace the pistons. If
necessary, rebore or replace the cylinder block.
HINT: (Use cylinder block sub–assembly)
When installing a standard piston, install one with the
same mark as the standard bore diameter mark on the
cylinder block.
3. MEASURE CLEARANCE BETWEEN PISTON
GROOVE AND PISTON RING
Using a thickness gauge, measure the clearance be–
tween the piston ring and the ring land.
Standard ring groove clearance: 0.03 – 0.07 mm
(0.0012 – 0.0028 in.)
Maximum ring groove clearance: 0.2 mm (0.008 in.)
If the clearance is greater than maximum, replace the
piston ring and/or piston.