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2008 - MX-5 - Engine

ENGINE TECHNICAL DATA [LF]



Item

Specification

Valve clearance [Engine cold]

IN: 0.22—0.28 mm {0.0087—0.0110 in}

EX: 0.27—0.33 mm {0.0107—0.0129 in}

Compression

Standard: 1,720 kPa {17.5391 kgf/cm2, 249.465 psi} [300 rpm]

Minimum: 1,204 kPa {12.277 kgf/cm2, 174.58 psi} [300 rpm]

Maximum difference between cylinders: 196.1 kPa {2.0 kgf/cm2, 28.5 psi}

Front oil seal press-in amount

0—1.0 mm {0—0.039 in}

Cylinder Head Bolt Length L

145.2—145.8 mm {5.72—5.74 in}

Cylinder Head Bolt Maximum

146.5 mm {5.77 in}

Oil control valve resistance

6.9—7.9 ohms [20°C {68°F}]

Ignition timing

Approx. BTDC 8 °

Idle speed

No load: 670—770 rpm (MT), 700—800 rpm (AT)

Electrical loads (38—48 A): 00—800 rpm (AT)

Electrical loads (more than 48 A): 800—900 rpm

P/S ON: 700—800 rpm (MT), 750—850 rpm (AT)

A/C ON: 825—925 rpm (MT), 775—875 rpm (AT)

Idle mixture

HC concentration: Within the regulation

CO concentration: Within the regulation

Oil pressure (reference value) [oil temperature: 100 °C {212 °F}]

337—591 kPa {3.44—6.03 kgf/cm2, 49.0—85.8 psi} min [3,000 rpm]

Engine oil capacity (approx. quantity) (AT, 5MT)

Oil replacement: 4.05 L {4.28 US qt, 3.56 Imp qt}

Oil and oil filter replacement: 4.45 L {4.70 US qt, 3.92 Imp qt}

Total (dry engine): 4.75 L {5.02 US qt, 4.18 Imp qt}

Engine oil capacity (approx. quantity) (6MT)

Oil replacement: 4.05 L {4.28 US qt, 3.56 Imp qt}

Oil and oil filter replacement: 4.55 L {4.81 US qt, 4.00 Imp qt}

Total (dry engine): 4.85 L {5.12 US qt, 4.27 Imp qt}

Engine coolant capacity (approx. quantity)

7.5 L {7.9 US qt, 6.6 Imp qt}

Cooling system cap valve opening pressure

93.2—122.6 kPa {0.95—1.25 kgf/cm2, 13.5—17.8 psi}

Thermostat initial-opening temperature

80—84 °C {176—183 °F}

Thermostat full-open temperature

97 °C {207 °F}

Thermostat full-open lift

More than 8.0 mm {0.31 in}

Cooling fan motor current

High: 9.0—12.0 A

Middle: 6.4—9.4 A

Low: 4.8—7.8 A

Fuel line pressure

350—410 kPa {3.57—4.18 kgf/cm2, 50.8—59.4 psi}

Fuel hold pressure

250 kPa {2.55 kgf/cm2, 36.2 psi} or more

Fuel injector resistance

11.4—12.6 ohms [20 °C {68 °F}]

Fuel injector leakage amount

Less than 1 drop/2 min

Fuel injection volume

204—216 ml {204—216 cc, 12.5—13.1 cu in}/min

Battery electrolyte specific gravity [20 °C {68 °F}]

1.22—1.29

Battery load test current

46B24L (36): 135 A

Battery parasitic draw (When the ignition is off (key is removed), all doors and the hood are closed.)

Vehicles with immobilizer system: 25—45 mA

Vehicles without immobilizer system: 30 mA or less

Battery slow charge current

46B24L (36): 3.5—4.5 A

Battery quick charge current [30 min.]

46B24L (36): 25 A

Generator standard voltage [IG-ON]

Terminal B: B+

Terminal P: Approx. 1 V or less

Terminal D: Approx. 0 V

Generator standard voltage [Idle, 20 °C {68 °F}]

Terminal B: 13—15 V

Terminal P: Approx. 3—8 V

Terminal D: Turn the electrical loads (headlights, blower motor, rear window defroster) on and verify that the voltage reading increases.

Generator generated current minimum value

70% of the nominal output current (nominal output current: 100 A)

[ambient temp. 20 °C {68 °F}, voltage 13.0—15.0 V, both engine and generator are hot]

Generator rotor resistance (between slip rings) [20 °C {68 °F}]

2.0—2.3 ohm

Generator brush length

Standard: 22.5 mm {0.89 in}

Minimum: 5.0 mm {0.20 in}

Generator brush spring force

Standard: 4.1—5.3 N {0.42—0.54 kgf, 0.92—1.19 lbf}

Minimum: 1.7 N {0.17 kgf, 0.38 lbf}

Firing order

1-3-4-2 (all cylinders independent firing)

Spark plug type

L3G2 18 110, L3Y1 18 110

Spark plug gap

1.25—1.35 mm {0.050—0.053 in}

Spark plug resistance [25 °C {77 °F}]

3.0—7.5 kilohms

Starter no load test voltage

11 V

Starter no load test current

90 A or less

Starter pinion gap

0.5—2.0 mm {0.02—0.07 in}

Starter armature runout

0.1 mm {0.004 in} max.

Starter commutator diameter

Standard: 29.4 mm {1.16 in}

Minimum: 28.8 mm {1.13 in}

Segment groove depth of starter commutator

Standard: 0.5 mm {0.02 in}

Minimum: 0.2 mm {0.008 in}

Starter brush length

Standard: 12.3 mm {0.48 in}

Minimum: 5.5 mm {0.22 in}

Starter brush spring force

Standard: 15.0—20.4 N {1.53—2.08 kgf, 3.38—4.58 lbf}

Minimum: 2.75 N {0.28 kgf, 0.62 lbf}


Engine oil specification

Item

U.S.A. and CANADA

Except U.S.A. and CANADA

Engine oil grade

API SM or ILSAC

Engine oil viscosity

5W–20

5W–20 (If SAE 5W-20 engine oil is not available in your market, use SAE 5W-30 engine oil.)




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