Emissions - Evaporative Emissions System Testing

Emissions - Evaporative Emissions System Testing

SI M16 01 07

Fuel Supply Systems

August 2007

Technical Service

This Service Information bulletin supersedes S.I. M16 01 07 dated August 2007.

[NEW] designates changes to this revision

SUBJECT

Testing Evaporative System for Leaks

MODEL

All Models

SITUATION

Testing evaporative systems for leaks is very challenging. We have developed some diagnostic hints along with the introduction of a new special tool

to properly connect a smoke machine to the DMTL fresh air vent.

Recently the VACUTEC(R) Smoke Machine [NEW] 625-522B-BMW has been added to the Equipment Program. The VACUTEC(R) Smoke

Machine [NEW] 625-522B-BMW is the only approved testing device for fuel and evaporative systems. This device automatically converts air to

high purity nitrogen using Pressure Swing Absorption (PSA) nitrogen technology. Orders for the VACUTEC(R) Smoke Machine [NEW]

625-522B-BMW can be placed by calling the Equipment program at 1 888 222 7997.

Included with the new VACUTEC(R) smoke machine are various caps and adaptors to help connect the applicator hose to the vehicle. It is always

suggested to not disturb the system before testing, try to create as little as possible disturbance to the system when connecting the smoke machine.

This smoke machine utilizes an UltraTraceUV(R) smoke solution. The smoke solution incorporates an ultraviolet dye which helps pinpoint the leak

with an ultraviolet residue surrounding the leak area. Determining the source of the leak is made easy when the included Hi-Density True UV LED

light and incandescent white light are used.

2002-2006 Mini Cooper (R50) L4-1.6L (W10) Page 285

Shown above is a new test tool which can connect directly to DMTL (Diagnosis Module Tank Leakage) pump equipped vehicles only after the fresh

air filter connection has been removed.

When properly connecting the tool to the system the

main benefit is that it does not disturb the integrity of

the system. This tool should be used anytime the

vehicle is in the workshop for a small or large leak in

evaporative system. Shown in the picture is the tool

connected to the DMTL at the fresh air filter

connection.

All vehicles equipped with a LDP (Leak Diagnosis Pump) system.

Vehicles equipped with the LDP system will require a

series of small pieces of rubber hose to adapt the

smoke machine application hose.

For more information regarding evaporative system testing describing possible fire hazards using oxygen vs. nitrogen please refer to the following