VW Golf 5 - Loss of coolant | BEHR HELLA

VW

Golf 5

Model year: 2003 - 2007

Engine: 2.0 TDI

BKD

Loss of coolant

The above vehicles may experience a slow coolant loss. It is not possible to determine the cause of this issue at a glance.

To determine the cause of the coolant loss in the TDI motors with the code letters "BKD," proceed as follows:

  • Perform a visual check on all the relevant system components (traces of coolant, leaks)
  • Perform a pressure loss test on the cooling system
  • Check the coolant for contamination (oil)
  • Check for coolant in the engine oil

Should the above methods fail to determine the source of the coolant loss, the following potential causes must also be considered:

  • Internal leaks in the exhaust gas recirculation radiator (AGR)
  • Defective cylinder head gasket
  • Hairline cracks in the cylinder head

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