Toyota MR2 1988 Repair Manual page 86

ENGINE MECHANICAL - Cylinder Head (4A-GE) EM-43
EM0513
EM2196
(e) Remove the bearing caps.
(f) Measure the Plastigage at its widest point.
Standard oil clearance: 0.035 - 0.072 mm
(0.0014 - 0.0028 in.)
Maximum oil clearance: 0.1 0 mm (0.0039 in.)
If the oil clearance is greater than maximum, replace the
camshaft. If necessary, replace the bearing caps and
cylinder head as a set.
(g) Completely remove the Plastigage.
16. INSPECT VALVE LIFTERS AND LIFTER BORES
(a) Using a micrometer, measure the lifter diameter.
Lifter diameter: 27.975 - 27.985 mm
(1.1014- 1.1018 in.)
(b) Using a caliper gauge, measure the lifter bore
diameter of the cylinder head.
Lifter bore diameter: 28.000- 28.021 mm
(1.1024- 1.1032 in.)
(c) Subtract the lifter diameter measurement from the
lifter bore diameter measurement.
Standard oil clearance: 0.015 - 0.046 mm
(0.0005 - 0.0018 in.)
Maximum oil clearance: 0.10 mm (0.0039 in.)
'---------------e"'"M'-'16;.;;..J3,
If the oil clearance is greater than maximum, replace the
0 0
Intake Manifold
(4A-GZE)
~
Air
Control Valve
(4A-GE)
lifter. If necessary, replace the cylinder head.
17. INSPECT INTAKE, EXHAUST MANIFOLDS AND AIR
CONTROL VALVE
Using a precision straight edge and feeler gauge, check
the surfaces contacting the cylinder head or air control
valve for warpage.
Maximum warpage:
Intake manifold 0.05 mm (0.0020 in.)
Exhaust manifold 0.30 mm (0.0118 in.)
Air control valve 0.05 mm (0.0020 in.)
(4A-GE only)
If warpage is greater than maximum, replace the manifold
or air control valve.