There is a VW TPI about this, its normal for most people unless you have the engine running HOT for at least a few hours every day, and not just short runs.
Customer statement / workshop findings:
White paste/foam/sludge in oil filler neck.
Technical background:
Because of its high efficiency the engine EA288 has low waste heat. As a result, the temperature is too low for the water in the filler neck to evaporate. The big temperature difference of the filler pipe/cap to the remaining
system/oil circuit leads to increased condensed water formation on the filler neck/cap. The resulting emulsion (of oil and steam) is deposited as oil sludge.
On the EA288 engine in the Caddy, T6 and Crafter the filler neck/cap is positioned directly in the air flow (no engine cover panel). This assists the condensate formation. Production change
- Measure
Explain the following background to the customer: The big temperature difference of the filler pipe/cap to the remaining system/oil circuit leads to increased condensed water formation on the filler neck/cap.
The emulsion on the filler pipe/cap is must therefore be regarded as normal. A repair is not necessary. But the emulsion can also be caused by external water supply, therefore the following points must be observed.
• To rule out other causes check the oil and coolant level.
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