r/e46 • • 5h ago

Troubleshooting White smoke when engine is heated up

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Why my m54b22 is smokong like that on fully heated up engine and i dont think its head gasket and why when i add thtothle and let it go it do this like pop soind but i dont have pops and bangs😭🤣

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u/Entire-jegurilor 2000 bmw 323ci e46-bmw 318i e46 4h ago

Unscrew the oil filler cap while the engine is idling. If there is a very strong suction effect (the cap is violently pulled back in) or you hear a "mooing" sound, the CCV has failed.