2006 Toyota Corolla
Spark plugs
The book has two engines. Use the plug number and the torque for the engine code on the truck.
Quick answer
1ZZ-FE plug number, gap, and torque
DENSO SK16R11 or NGK IFR5A11. Gap 1.0 to 1.3 mm (0.039 to 0.051 in.). Tighten the plug to 25 N·m (18 ft·lbf) with a 16 mm wrench. The coil bolt is 9.0 N·m (80 in·lbf).
The 2ZZ-GE calls for DENSO SK20R11 or NGK IFR6A11. Same gap. Plug torque is 18 N·m (13 ft·lbf).
1ZZ-FE spark plug specification and torque table. 2ZZ-GE specification and install step. The 2ZZ torque table is titled “TORQUE SPECIFICATIONS - 2ZZ-FE” on the 2ZZ-GE page.
1ZZ-FE plugs
| Book calls it | Number |
|---|---|
| DENSO | SK16R11 |
| NGK | IFR5A11 |
| Gap | 1.0 to 1.3 mm (0.039 to 0.051 in.) |
| Replace | Every 192,000 km (120,000 miles) |
Inspection, Ignition System (1ZZ-FE). The data table prints the same two numbers.
Search links. The book gives these numbers.
- Do not clean a plug with a wire brush. Do not change the gap on a used plug.
Inspection note, 1ZZ-FE.
- Blow the plug clean. Keep the air below 588 kPa (6.0 kg/cm², 85 psi), for 20 seconds or less.
Fig 1: Cleaning Spark Plug. Drawing G02613782.
- Look at the threads and the insulator. If either is damaged, replace the plug.
Fig 2. Drawing G02613783. Recommended spark plug: SK16R11 (DENSO made), IFR5A11 (NGK made).
- Check the gap. It should be 1.0 to 1.3 mm (0.039 to 0.051 in.).
Fig 3: Checking Spark Plug Electrode Gap. Drawing G02613784.
1ZZ-FE, plugs out and back in
The book puts the wrench and the torque in the spark test.
- Check for a stored code first. If one is there, follow that code. This page does not name one.
On-Vehicle Inspection, 1ZZ-FE. “If a DTC is present, perform troubleshooting in accordance with the procedure for that DTC.”
- Take the ignition coils off.
“Remove the ignition coils (with igniter).”
- Take the plugs out with a 16 mm (0.63 in.) plug wrench.
“Using a 16 mm (0.63 in) plug wrench, remove the spark plugs.”
- To watch for spark, seat each plug in a coil, connect the coil, unplug the four injectors, and ground the plugs. Crank, and stop by 2 seconds. If you feel a hit while holding a plug, replace that coil.
“Be sure to ground the spark plugs when checking.” “Do not crank the engine for more than 2 seconds.” “Replace the ignition coil if a physical impact is felt while holding the spark plugs.”
- Put the plugs back with the 16 mm wrench. Tighten them to 25 N·m (255 kgf·cm, 18 ft·lbf).
Install step: “Torque: 25 N.m (255 kgf.cm, 18 ft.lbf).” Torque table row: “Spark plug at Cylinder head cover,” 25 N.m.
- Put the coils back. Tighten the bolts to 9.0 N·m (92 kgf·cm, 80 in·lbf).
Install step prints “80 in..lbf”. Torque table prints “80 in.lbf”.
2ZZ-GE plugs
| Book calls it | Number |
|---|---|
| DENSO | SK20R11 |
| NGK | IFR6A11 |
| Gap | 1.0 to 1.3 mm (0.039 to 0.051 in.) |
| Plug torque | 18 N·m (178 kgf·cm, 13 ft·lbf) |
| Coil bolt | 9.0 N·m (80 in·lbf) |
Inspection, Ignition System (2ZZ-GE). Install step: 18 N.m (178 kgf.cm, 13 ft.lbf). Torque table title on that page: “TORQUE SPECIFICATIONS - 2ZZ-FE”. Row: “Spark plug at Cylinder head.”
- Same cleaning rule. No wire brush. Do not adjust the gap on a used plug. Same 192,000 km (120,000 miles). Same air limit, 588 kPa (85 psi), 20 seconds or less.
Fig 1, 2ZZ-GE. Drawing G02613786.
- Check the threads and the insulator. The book’s numbers here are SK20R11 and IFR6A11.
Fig 2, 2ZZ-GE. Drawing G02613787.
- Check the gap. 1.0 to 1.3 mm (0.039 to 0.051 in.).
Fig 3, 2ZZ-GE. Drawing G02613788.
- The plug wrench is 16 mm. Tighten the plug to 18 N·m (13 ft·lbf). Tighten the coil bolt to 9.0 N·m.
On-Vehicle Inspection, 2ZZ-GE. “Using a 16 mm (0.63 in) plug wrench.” Install step: “Torque: 18 N.m (178 kgf.cm, 13 ft.lbf).”
What the book does not give
The book does not say which trim is the 1ZZ-FE and which trim is the 2ZZ-GE. Match the engine code on the truck.
The 1ZZ-FE camshaft-sensor line on the inspection page drops the low end of the resistance. The data table says 835 to 1,400 Ω cold. That check stays on its own page.
The shop-inspection map says you are not required to replace spark plugs in sets.