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
