17 00 009 Checking cooling system for leaks (S65)

WARNING: This page is about a different car, the 2011 BMW M3, 2010 BMW M3, 2009 BMW M3, and 2008 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Danger of scalding!
Only perform this work after engine has cooled down.

Protective measures/rules of conduct

Wear protective goggles
Wear protective gloves
Observe national/country-specific regulations

IMPORTANT: Risk of slipping due to coolant on the floor.

Danger of injury!

Catch and dispose of drained coolant in drip tray (1) and if necessary special tool 00 2 030 00 2 030 DEVICE (universal hydraulic lifter).

Recycling:

Observe country-specific waste-disposal regulations.

Fig 1: Identifying Drip Tray And Special Tool (00 2 030)

Courtesy of BMW OF NORTH AMERICA, INC.

Checking pressure drop in cooling system

Open cap on coolant expansion tank. Fit special tools 17 0 101/17 0 113.

Build up gauge pressure of 2 bar, wait approx. 2 minutes.

Cooling system is impervious to leaks if pressure drop is max. 0.1 bar.

Fig 2: Checking Pressure Drop In Cooling System Using Special Tool (17 0 101/17 0 113)

Courtesy of BMW OF NORTH AMERICA, INC.

Checking pressure relief valve in cap

NOTE:

Coolant residue can cause the pressure relief valve in the cap to stick, therefore repeat the check procedure on the cap 2-3 times.

Screw cap (1) onto special tool 17 0 114.

Build up pressure with special tool 17 0 101 (hand pump); observe pressure gauge to ascertain when opening pressure is achieved.

OPENING PRESSURE OF PRESSURE RELIEF VALVE .

Fig 3: Checking Pressure Relief Valve In Cap Using Special Tool (Hand Pump 17 0 101)

Courtesy of BMW OF NORTH AMERICA, INC.