Subject: Spark Plugs Models: 912 ALL/911 ALL/911 Turbo
Bulletin Number: 85 – 08
Below is a listing of all tested and approved spark plugs.
Type/Model Make Type Electrode Gap in mm
| 912 1966-69 Bosch Champion W6BC 0.6-0.7 L82Y 0.6-0.7 |
| 912E 1976 Bosch WR7DC 0.7 +0.1 -0 |
| 911, 1965-68 Bosch W4DPO 0.55 911L Champion N6YC 0.70 |
| 911S 1966-68 Bosch W3DPO 0.55 |
| 911T 1969-71 Bosch W5DC 0.60 |
| 911E 1969-71 Bosch W3DPO 0.55 911S |
| 911T 1972-73 Bosch W5DPO 0.55 |
| 911E 1972-73 Bosch W36DPO 0.55 911S |
| 911 1974-77 Bosch W5DPO 0.55 |
| 911S 1974-77 Bosch W5DPO 0.55 |
| 911 1976-79 Bosch W3DPO 0.60 Turbo |
| 911SC 1978-79 Bosch W5DC 0.7+0.1 -0 |
| 911 1984-86 Bosch W8DC 0.7+0.1 -0 Carrera 0.7+0.1 -0 0.7+0.1 -0 |
| 911 1986 Bosch W3Dp 0.7+0.1 Turbo -0 |
NOTE:
- Spark plug tightening torque: 30 Nm/21.6 ft. lbs.
- It is recommended to lubricate the threads of spark plugs lightly with graphite grease (Molykote paste HTP white), or equivalent, prior to installation. Make sure paste is kept off the electrode and inside of the spark plug!
Bosch Platinum Spark Plugs
Spark plugs designated with the letters “DPO”, or W3DPO on the new Bosch spark plug Designation System correspond with the conventional design platinum spark plugs from the old system which were W28OP21.
Spark plugs with the letters “DP” or CP or W5DP or W3CP are platinum spark plugs of the new design with a sintered center electrode. These spark plugs must not be installed when conventional design platinum spark plugs “P21” or “DPO” only are specified.
Bosch Spark Plugs
Super
Platin – old (DPO)
Platin – new (DP or CP)
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