Wendy Smith Posted June 10, 2023 Share Posted June 10, 2023 Advice please, 2003 Alphard V6. Recently had timing belt replaced, noticeably quieter engine afterwards. In past couple of weeks on cold start I can hear drumming noise, just briefly. Doesn't appear to happen on subsequent journeys. Could it be tappets? Quote Link to comment Share on other sites More sharing options...
Geralt Posted June 18, 2023 Share Posted June 18, 2023 I don't think it has tappets, rather it has overhead cams. I think that perhaps it's VVT noise as oil pressure is rising. Perhaps it's always been there and now you notice it because the background engine noise is reduced? Anyway, if you have plenty of oil and no check engine or oil pressure lamps illuminated then I wouldn't lose any sleep about it. Quote Link to comment Share on other sites More sharing options...
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