How to Check Water Pump Impeller 2 liter engine (AEG)
Abstract: This article provides an overview of repair and diagnostic information related to the following procedure: Water pump impellar.
Applies to: VW Jetta, Golf, GTI 1999 - 2006, R32 2004 - Engine Code AEG (Volkswagen A4 platform)
2.0 Liter engines come equipped from the factory with a plastic impeller on the water pump. The impeller fails over time and cause a loss of engine cooling (engne will overheat) and a loss of cabin heating (no heat in interior of vehicle). Using the following procedure the impeller can be quickly diagnosed.
The following photo shows a failed plastic water pump impeller.
- Remove thermostat.
- Insert gloved finger into thermostat mounting hole (inset). try to turn impeller with gloved finger. If impeller moves freely it has failed.
Before Performing any Work
Please read Cautions and Warnings before proceeding with any work on your vehicle
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