17 00 009 Checking cooling system for water watertightness (N12, N14, N16, N18)

WARNING: This page is about a different variant/trim than selected.

Notes

WARNING: Risk of burning and scalding!

Only perform this repair work after engine has cooled down.

IMPORTANT: Open cooling system only when it has cooled down.

Opening the cooling system while hot can result in air entering the system.

This can cause overheating with permanent damage to the engine!

Necessary preliminary work

Checking pressure drop in cooling system

Unscrew sealing cap from coolant filler neck.

Connect special tool 17 0 109 to the coolant filler neck.

Connect special tools 17 0 102 and 17 0 101.

BUILD UP EXCESS PRESSURE and wait approx. 2 minutes.

Cooling system is tight if pressure drop does not exceed 0.1 bar.

Fig 1: Connecting Special Tool 17 0 109 To Coolant Filler Neck

Courtesy of BMW OF NORTH AMERICA, INC.

Checking pressure relief valve in lid

Connect special tool 17 0 115 to sealing cap (1).

Connect special tools 17 0 101 and 17 0 102.

Pressurise sealing cap.

Fig 2: Connecting Special Tool 17 0 115 To Sealing Cap

Courtesy of BMW OF NORTH AMERICA, INC.