Emissions - Hard Start/Rough Idle, Charcoal Canister
87bmw10GROUP 13 Fuel System
Bulletin Number 13 01 87 (1345) Page 1 of 2
Montvale, NJ April 1987 Technical Dept.
SUBJECT: Charcoal Canister and Purge Valve for Evaporative Emission Control System
MODELS: 325i/325iC (produced in December 1986)
Condition: Car may develop hard starting and/or rough idle in high ambient temperatures (refer also to S.I. 13 03 87 (1351).
Cause: Continuous purging of evaporative vapors from charcoal canister due to the possibility of loose charcoal particles also being purged from the canister. These particles might jam the purge valve and keep it open continuously.
Condition: Some of the charcoal canisters from the initial factory supply may have loose charcoal particles in the upper space between the sealing felt and the purge line fitting. This condition was detected early at the factory and the vast majority of charcoal canisters was exchanged before vehicle delivery to the dealership.
However, some vehicles were delivered to the dealers with the original charcoal canister still installed.
NOTE: The proper charcoal canister has a white dot next to the production stamp.
Cars affected:
Type VIN
325i 2420001 - 2420157
8830000 - 8830330
325i Automatic 2445001 - 2445559
325is 2320001 - 2322017
325is Automatic 3110001 - 3110726
325IC 1925001 - 1925985
325iC Automatic 1940001 - 1940825
Correction: 1. Checking of installed charcoal canister for white dot.
2. Replacement of charcoal canister, if necessary.
3. If necessary, replacement of purge valve.
B) For cars which have been delivered to customers (During the customer's next visit to the Service Department)
1) Check if a charcoal canister with a white dot is installed.
- If YES, do not proceed any further.
- If NO, replace charcoal canister by one marked with a white dot.
2) Check the function of the purge valve on those cars where the charcoal canister had to be replaced:
- Detach hoses and plug from purge valve.
- Remove purge valve from engine.
- Attach vacuum pump hose of BMW Service Tester to 8 mm fitting of purge valve
- Supply 12 volts to purge valve being closed (do not reconnect original plug for voltage supply).
- Set BMW Service Tester to Multimeter Program 21.
- Switch on vacuum pump.
- Adjust vacuum pump of BMW Service Tester to 600 +/- 100 mbar.
- Let vacuum pump run for 10 seconds, then switch off vacuum pump.
- After another 20 seconds, read the vacuum drop:
^ If the vacuum drop is smaller than 50 mbar, the purge valve does not have to be replaced.
^ If the vacuum drop is greater than 50 mbar, the purge valve has to be replaced.
- Install purge valve and connect plug and hoses properly.
C) Cars with symptoms of hard starting and/or rough idle in high ambient temperatures. Follow procedure as outlined under "B".
Parts
Information: Description Quantity Part Number
Charcoal canister 1 16 13 1 179 355
Purge valve (if necessary) 1 13 90 1 711 395
NOTE: Only charcoal canisters with a white dot are in stock at the Parts Distribution Centers.
Warranty
Status: Labor and/or parts reimbursable under the provisions of the BMW 5 Year/50,000 Mile Emission Warranty.
NOTE: Replaced parts have to be sent in to National Warranty Parts Return Center when requested on "daily" and/or "weekly" credit memo.
Defect code: 00 00 13 74 00
1. Replacement of charcoal canister.
Labor operation: 00 50 633 Labor allowance: 3 FRU
2. Check function of purge valve and replace, if necessary.
Labor operation: 00 50 634 Labor allowance: 1 FRU