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Go Back   TDIClub Forums > VW TDI Discussion Areas > TDI (Diesel) Emissions

TDI (Diesel) Emissions This is a discussion about emissions from TDI's. Pro's cons of Diesels (including biodiesel) effects on the environment and how they compare to Gasoline and other fuel sources for Internal combustion engines.

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Old June 4th, 2019, 22:28   #1
Adrian rushforth
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Default 04 golf tdi sensor?

Can anyone tell me what this is on the ccv breather tube, is it a sensor?

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Old June 5th, 2019, 05:17   #2
CopaMundial
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CCV Heater

https://www.idparts.com/ccv-heater-a4-p-7472.html
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Old June 5th, 2019, 05:53   #3
Adrian rushforth
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Thanks what is the purpose of this heater?

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Old June 5th, 2019, 16:45   #4
CopaMundial
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Water vapor condenses out of the crankcase fumes. The heater prevents that from freezing and blocking the small breather hose.
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Old June 5th, 2019, 18:00   #5
Adrian rushforth
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Ok that makes sense thanks for response

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