Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1998 Lexus LS 400FACTORY OEM SERVICE PROCEDURE
Spark Plugs
SPARK PLUG TYPE
| Application | Plug No. |
|---|---|
| NGK | BKR6EKPB-11 |
| Denso | PK20TR-11 |
SPARK PLUG TYPE
| Application | Plug No. |
|---|---|
| NGK | BKR5EKPB-11 |
| Denso | PK16R-11 |
SPARK PLUG TYPE
| Application | Plug No. |
|---|---|
| NGK | IFR6A-11 |
| ND | SK20R-11 |
SPARK PLUG SPECIFICATIONS
| Application | Gap In. (mm) | Torque Ft. Lbs. (N.m) | ||
|---|---|---|---|---|
| New Plug | .043 (1.10) | 13 (17) | ||
| Maximum Wear (1) | .051 (1.30) | 13 (17) | ||
|
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SPARK PLUG SPECIFICATIONS
| Application | Gap In. (mm) | Torque Ft. Lbs. (N.m) | ||
|---|---|---|---|---|
| New Plug | .043 (1.10) | 13 (17) | ||
| Maximum Wear (1) | .047 (1.20) | 13 (17) | ||
|
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Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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