PDF《Bosch spark plugs:》

08 to 2) indicate "cold" spark plugs, which means low thermal absorption for hot engines. High numbers (e.g.

7 to 10) indicate "hot" spark plugs, which means high thermal absorption for cold engines. Spark plug Heat range number Engine temperature Thermal absorption Thermal conductivity Cold Low High Low High Hot High Low High Low Combination

1 Combination

2 Combination

3 Combination

4 Engine Hot Cold Cold Hot Spark plug Hot Cold Hot Cold Result Auto-ignition Carbon fouling Suitable Suitable Effect Engine damage Misfiring, poor cold starting Optimum function Optimum function

1 Screw in the spark plug by hand until it is seated in the cylinder head.

2 Then turn the spark plug, flat seat and new seal by a further approx. 90° with a spark plug wrench. Simple and safe installation Center electrode temperature NGK model code Bosch model Order no. B10EG W

07 CS

0 241

274 505 B5HS W

8 AC

0 241

229 604 B6HS W

7 AC

0 241

235 607 B7ES W

5 CC

0 241

245 581 B7HS W

5 AC

0 241

245 580 B8EG W

3 CS

0 241

256 515 B8ES W

4 CC

0 241

248 538 B8HS W

3 AC

0 241

256 512 B9EG W

3 CS

0 241

256 515 B9ES W

3 CC

0 241

256 522 B9HS W

2 AC

0 241

260 507 BP5ES W

8 DC

0 241

229 715 BP6ES W

7 DC

0 241

235 755 BP6HS W

7 BC

0 241

235 754 BP7ES W

6 DC

0241 240

611 BPR6HS10 WR

7 BC+

0 242

235 665 BPR7ES WR

5 DC+

0 242

245 552 BPR7HS WR

6 BC

0 242

240 561 BPR8HS WR

5 BC

0 242

245 531 BR10EG WR

07 CS

0 242

274 501 BR10ES WR

09 CC

0 242

265 500 BR6HS WR

7 AC

0 242

235 533 BR6HSA WR

5 BC

0 0

242 245

577 BR7ES WR

5 CC

0 242

245 521 BR7HS WR

5 AC

0 242

245 517 BR8EG WR

3 CS

0 242

255 504 BR8ES WR

4 CC

0 242

250 503 BR8HS WR

2 AC

0 242

260 500 BR8HSA WR

3 BC

0 0

242 255

515 BR9EG WR

3 CS

0 242

255 504 NGK model code Bosch model Order no. BR9ES WR

3 CC

0 242

255 502 BR9HS WR

08 AC

0 242

268 500 C7HSA U

3 AC

0 241

056 502 CPR8E UR

3 DC

0 242

055 509 CR10EK UR

06 CDC

0 242

080 500 CR6HSA UR

3 AC

0242 055

501 CR7E UR

2 CC

0 242

060 501 CR7EB UR

2 CC

0 242

060 501 CR7HS UR

2 AC

0 242

060 506 CR7HSA UR

09 AC

0 242

065 501 CR8E UR

09 CC

0 242

065 500 CR8EB UR

09 CC

0 242

065 500 CR8EH9 UHR

3 CC

0 242

055 508 CR8EK UR

2 CDC

0 242

060 505 CR9E UR

08 CC

0 242

068 500 CR9EB UR

08 CC

0 242

068 500 CR9EH9 UHR

08 CC

0 242

068 501 CR9EK UR

07 CDC

0 242

074 500 D8EA X

4 CC

0 241

150 504 DCPR8E YR

6 DES

0 242

140 519 DCPR9E YR

4 DE

0 242

150 506 DPR7EA9 XR

7 DC

0 242

135 502 DPR8EA9 XR

5 DC

0 242

145 516 DPR9EA9 XR

4 DC

0 242

150 505 DR8EA XR

4 CC

0 242

150 507 DR8ES XR

2 CE

0 0

242 160

503 DR8ESL XR

4 CC

0 242

150 507 DR9EA XR

2 CE

0 0

242 160

503 JR9B XR

2 CE

0 0

242 160

503 JR9C XR

2 DDC

0 242

160 502 Safety range Auto-ignition range 100%

0 500

850 Operating temperature range [°C]

1000 Temperature measurement Engine performance Self-cleaning threshold