Service Data and Specifications (S.D.S.) - Engine Maintenance (Cont'd)
MA-70spec tablePage corner marker is "E". Specs (carbureted spark plug types BP5ES, ignition timing/idle speed, mixture ratio CO%) correspond to a GA-series carbureted engine, distinct from the SR20 specs on the facing page.
Valve clearance
Valve clearance (Unit: mm (in))
Intake
Hot0.28 (0.011)
Exhaust
Hot0.28 (0.011)
Drive belt deflection
Drive belt deflection (Unit: mm (in))
Alternator mm (in)
Used belt - Limit13.5 (0.531)
Used belt - Deflection after adjustment8.5 - 9.5 (0.335 - 0.374)
Deflection of new belt7.5 - 8.5 (0.295 - 0.335)
Air conditioner mm (in)
Used belt - Limit12.5 (0.492)
Used belt - Deflection after adjustment9 - 10 (0.35 - 0.39)
Deflection of new belt6 - 8 (0.24 - 0.31)
Power steering mm (in)
Used belt - Limit10.5 (0.413)
Used belt - Deflection after adjustment7 - 9 (0.28 - 0.35)
Deflection of new belt6.5 - 8.5 (0.256 - 0.335)
Pushing force N (kg, lb)
Used belt - Limit98 (10, 22)
Used belt - Deflection after adjustment98 (10, 22)
Deflection of new belt98 (10, 22)
Cooling system check
Cooling system check (Unit: kPa (bar, kg/cm², psi))
Cooling system leakage testing pressure
Value98 (0.98, 1.0, 14)
Radiator cap testing pressure
Value78 - 98 (0.78 - 0.98, 0.8 - 1.0, 11 - 14)
Spark plug
Spark plug
Type - Standard
ValueBP5ES
Type - Hot
ValueBP4ES
Type - Cold
ValueBP6ES
Plug gap mm (in)
Value0.8 - 0.9 (0.031 - 0.035)
Ignition timing & idle speed
Ignition timing & idle speed
Ignition timing*1
Value2° ± 2° B.T.D.C.
Idle speed - M/T
Value900 ± 50
Idle speed - A/T (in "N" position)
Value—
NOTE
*1: Distributor vacuum hose disconnected and plugged
Mixture ratio
Mixture ratio
Idle CO%
Value1.5 ± 0.5