Intake and Vacuum System - Leak Detector

9225bmw01

Group 11
Engine


Bulletin Number
11 03 92 (3500)


Woodcliff Lake, NJ
February 1992
Product Engineering


SUBJECT:
Intake and Vacuum System Leak Detector

ENGINES:
All

Situation:
Leaks in the intake system are often responsible for starting problems, poor idling, and poor throttle response. Until now such leaks were localized by selective spraying with gasoline and other similar fluids. However, this method does not conform to safety regulations. The Liqui Moly (Lubro Moly) "Motor Lecksucher" Intake and Vacuum System Leak Detector is a spray used for localizing such leaks, and allows the safety regulations to be observed.

The active ingredient is drawn into the engine at the leak location while the engine is running. This leads to a decrease in engine speed on vehicles without an adaptive idle control system (fuel metering systems prior to DME 1.1), and an increase in the exhaust gas CO value.

Application:
- Connect the BMW Service Tester or other exhaust gas analyzing system to the engine (in front of the catalyic converter) as outlined in the repair manual.

- Disconnect the Oxygen Sensor.

- Start the engine and allow the CO and HC values to stabilize.

- Spray the intake system components selectively and systematically in the area of the suspected air leak and observe the CO reading and idle speed.

- When the product is drawn into the engine, an increase in CO and a sudden drop in idle rpm will be noticed.

Note:
Vehicles equipped with an adaptive idle control system will not allow the idle speed to drop off during this test. On these vehicles only a CO increase will be noticed.

- Reconnect the oxygen sensor after locating and repairing the air leak.


Caution:
This product is flammable and should not be exposed to open flames or glowing components. Always obey all cautions and warnings displayed on the container when using this product.

Parts
Information:
Liqui Moly (Lubro Moly) Motor Lecksucher - Intake and Vacuum System Leak Detector is distributed locally through Western Automotive Warehouse Distributors (W.A.W.D.) under Liqui Moly, part number 2021 (1 can 6.76 fl. oz.). Call 1-800-477-9293 for a local distributor in your area. When calling, also identify yourself as a BMW dealership to receive special pricing.

Warranty
Status:
Information only.