Checking Cooling System For Leaks (M54)
Checking Cooling System For Leaks (M54)Special tools required:
^ 17 0 101
^ 17 0 105
^ 17 0 106
Warning!
Danger of scalding!
Only perform this work after engine has cooled down.
Checking pressure drop in cooling system:
Open cap on coolant expansion tank. Fit special tools 17 0 101 / 17 0 105
Build up gauge pressure of 1.5 bar, wait approximately 2 minutes.
Cooling system is impervious to leaks if pressure drop is maximum 0.1 bar.
Checking pressure relief valve in cap:
Screw sealing cap (1) onto special tool 17 0 106.
Build up pressure with special tool (hand pump) 17 0 101, observe pressure gauge to ascertain when opening pressure is reached.
Compare opening pressure of pressure relief valve.