Ignition - Engine Misfiring
84bmw04Group 12 Engine - Electrical
Bulletin Number 12 06 84 (904) Page 1 of 3
Montvale, NJ December 1984 Technical Dept.
This bulletin supercedes S.I. 12 01 83 (735) dated June 1983. It announces NEW SECONDARY IGNITION PART NUMBERS (original kit part number has been broken out into individual part numbers) for the 528e.
Please remove and discard S.I. Bulletin 12 01 83 (735) dated June. 1983 from your S.I. binder.
SUBJECT: Engine Misfiring Under Heavy Load
MODELS: 1982/1983 528e produced prior to March 1983 1982/1983 633CSi 1982/1983 733i 1983 533i
Engine misfiring under heavy load, which is often diagnosed as being due to fouled spark plugs, could be caused by voltage "leakage" or "arcing" at the distributor cap, ignition coil high voltage lead, or one of the spark plug wires.
ALL OF THE SUBJECT VEHICLES, AS SHOWN ABOVE, SHOULD HAVE THE NEW IMPROVED SECONDARY IGNITION COMPONENTS, DESCRIBED ON PAGE 2, INSTALLED WHEN THEY ARE IN YOUR WORKSHOP. This program does not Include replacement or cleaning of spark plugs.
WARRANTY STATUS
1. Parts and labor reimbursable under the provisions of the BMW Limited 3 Year/36,000 Mile warranty.
2. Beyond 3 years/30,000 miles:
Parts and labor up to 5 years/50,000 miles under the provisions of the Emissions-Related Defect Warranty.
3. DO NOT RETURN ANY PARTS REPLACED DURING THIS MODIFICATION TO BMW OF NORTH AMERICA.
528e
Component Parts: Part Number Description
12 11 1 284 446 Rotor
12 11 1 284 448 Protective Cover
12 11 1 285 058 Distributor Cap
12 13 1 286 080 Clamp
12 13 1 286 087 Ignition Coil
12 12 1 289 829 Suppressor Connector
12 12 1 284 464 Cover
12 12 1 289 825 Suppressor Connector
12 12 1 705 656 Cable End (qty. = 2)
12 12 1 705 675 Ignition Wire
11 31 1 287 645 Adaptor
11 53 1 287 651 Hose
11 53 1 287 682 Hose
11 31 1 287 699 Cover
12 11 1 287 718 Cover
11 53 1 287 999 Hose
12 12 1 705 714 Ignition Wire Set
Labor Allowance: 19 FRU WT
Defect Code: 00 00 12 20 00
THE SPARK PLUG CONNECTORS MUST BE REMOVED FROM THE VEHICLE WIRE SET AND USED WITH THE ABOVE PARTS. THE ASSEMBLY INSTRUCTIONS LISTED BELOW MUST BE FOLLOWED.
533i/633CSi/733i
Installation Kit: Part Number 12 12 9 057 184
Labor Allowance: 3 FRU WT
Defect Code: 00 00 12 20 00
The installation kit for the 533i/633CSi/733i contains an Improved protective cover for the distributor cap and the required mounting hardware.
ASSEMBLY OF SECONDARY IGNITION COMPONENTS
Spark plug wires, the coil wire, distributor cap, or connectors arcing or damaged by arcing may be due to spark plug wires that were not properly assembled into their connectors by factory or dealer personnel.
When spark plug wires and/or the coil wire is replaced for any reason, the following procedures must be adhered to:
1. Unscrew the old high tension and/or coil wire approximately three turns and pull apart. If this step is not done, it will be almost Impossible to disassemble without the use of extreme force (which will damage the wire end) if the high tension wires were originally assembled correctly.
2. TO FACILITATE ASSEMBLY, ONLY THE FOLLOWING LUBRICANTS MAY BE USED CONTRARY TO PREVIOUS INFORMATION:
Universal Lubricating Spray - 81 22 9 407 005 High Temperature Paste - 81 22 9 407 171
3. Press the high tension wire into each connector until a "snap" is heard. THE SPARK PLUG WIRE AT THIS POINT IS NOT FULLY ASSEMBLED AND AN AIR GAP MAY REMAIN.
4. Screw the high tension wire into the connector approximately one turn until it resists further turning. DO NOT TRY TO FORCE THE HIGH TENSION WIRE TO TURN ANY FURTHER OR DAMAGE TO THE HIGH TENSION WIRE CRIMPED END WILL RESULT. The crimped end of the high tension wire will then be forced open resulting in a gap. This gap may cause a high tension wire, connector, or distributor cap to arc and subsequently fail.
5. Check all other high tension wires to make sure that they are properly screwed into their connectors. Should any high tension wires be discovered that continue to turn in the connector, i.e. the screw threads are stripped, repair as follows
a) Remove the high tension wire.
b) Slightly crimp the connector(s) at the end of the high tension wire and fully reassemble as shown on the previous page, 6. Spark plugs must be gapped within specifications.