What is the spark plug torque for Toyota Supra?
Torque depends on the Supra’s engine variant. For the traditional A80 with the 2JZ-GTE engine, aim for about 20 N·m (14–15 ft-lbs). For the modern A90/A91 with the B58 engine, the recommended range is roughly 23–25 N·m (17–18 ft-lbs). Always verify the exact specification for your model year and plug type before tightening.
Toyota Supra A80 (1993–2002) — 2JZ-GTE
The A80 Supra uses the 2JZ-GTE inline-6 turbo engine. This generation commonly employs OEM or equivalent iridium/platinum spark plugs with a relatively small gap, and keeping proper torque is essential for reliable sealing in the aluminum cylinder head.
Key torque value and installation notes for the A80:
- Torque specification: 20 N·m (14–15 ft-lbs).
- Use the correct plug type and gap as specified by Toyota for your exact engine revision.
- Do not rely on anti-seize on modern Toyota aluminum heads; if in doubt, follow Toyota’s service data.
- Torque gradually in a two-pass sequence to avoid thread distortion and to ensure seating.
- Recheck torque after initial engine run and ensure there are no leaks or misfires.
In short, for the A80’s 2JZ-GTE, tighten to 20 N·m (14–15 ft-lbs) with the proper plug type and gap, and follow manufacturer recommendations for any plug replacement.
Toyota Supra A90/A91 (2019–present) — B58
The contemporary Supra (A90/A91) uses the 3.0-liter B58 inline-6 engine in most markets. This modern design typically requires a slightly higher torque to seal the threaded connection in a high-pressure turbocharged setup while preserving head integrity.
Key torque value and installation notes for the B58:
- Torque specification: 23–25 N·m (17–18 ft-lbs).
- Use the correct spark plug type and heat range as specified for the B58 engine; ensure the gap is set per OEM guidance if replacing plugs.
- Avoid using anti-seize unless explicitly approved by Toyota for your plug type; improper use can affect torque accuracy.
- Torque in gradual steps with a calibrated torque wrench; snug first, then final torque to spec.
- After installation, verify the ignition system’s function during initial startup and inspect for any misfires or leaks.
For the B58 in the Supra, aim for a torque range of 23–25 N·m (17–18 ft-lbs) with the correct plug type, and always consult the latest Toyota service data or the plug manufacturer’s guidelines for your market.
Installation tips and cautions
Across both generations, a few universal tips help ensure a successful plug replacement:
- Match the plug type and heat range precisely to the engine’s requirements; incorrect plugs can affect performance and reliability.
- Use a quality torque wrench and verify calibration before use.
- Clean or chase thread wells if needed before installing the plugs to prevent cross-threading or seizing.
- Follow the recommended sequence for the spark plugs if replacing all in the same engine bank to avoid uneven seating.
Always double-check the exact torque specification in the official service manual for your vehicle’s production year and regional market, as there can be small variations between production runs and plug manufacturers.
Summary
For the Toyota Supra’s spark plugs, torque depends on the engine type and generation: about 20 N·m (14–15 ft-lbs) for the A80’s 2JZ-GTE, and about 23–25 N·m (17–18 ft-lbs) for the A90/A91’s B58. Use the correct plug type and gap, follow the service manual, and torque with a calibrated wrench to ensure proper seating and engine reliability.
Final takeaway
When in doubt, consult the exact service data for your Supra’s model year and plug specification. This ensures you apply the precise torque required for your engine, avoiding thread damage or misfires while maintaining optimal performance.
What is the torque on a 3.0 T spark plug?
TORQUE SPEC: 22 ft lb or 25 Nm.
What is the torque of Supra MK4?
Performance That Packs a Punch
Under the hood, the Toyota Supra MK4 boasts the legendary twin-turbo 3.0-liter straight-six engine, better known as the 2JZ. This powerhouse delivers up to 320 horsepower and 440 Nm of torque, allowing the Supra to sprint from 0 to 100 km/h in just 4.9 seconds.
What is the torque spec for Supra spark plugs?
Spark Plug Socket Specs
Recommended spark plug torque 17 lb-ft or 23nm.
What torque should spark plugs be tightened to?
Recommended Torque and Tightening Angle
| Thread Size | Applicable Models | Recommended Torque |
|---|---|---|
| M10 | Stainless Gasket Type ( *1 ) | 10-15N・m |
| M12 | All Types | 15-20N・m |
| M14 | Types other than the ones shown below | 20-30N・m |
