Engine knock when engine is cold?

2015 HONDA ACCORD
21,700 MILES • 3.5L • V6 • 2WD • AUTOMATIC
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RLD15 ACCORD
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My car is the EXL model. The engine has a knock only until it warms up. also, there is no knock under load that I can tell. Honda says this is normal for their engines. I don't really think so.
Jan 22, 2019 at 10:39 AM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
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Good morning,

No knock is normal under any circumstances.

Can you upload a video of the noise so we can hear it?

Roy
Jan 22, 2019 at 11:17 AM
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RLD15 ACCORD
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Thanks for replying Roy really appreciate it , yes I will try too get this video over to you this weekend
Jan 24, 2019 at 5:42 PM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
Your welcome

Always glad to help

Roy
Jan 24, 2019 at 6:35 PM
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BRANDONL512
  • ✓ASE Certified Mechanic
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  • ASE Certified Mechanic
sounds like it is a timing belt tensioner. the tensioner will leak fluid on these and have a loud fast knock or tapping noise until it warms up then usually goes away. timing belts are recommended at 7 years or 105k.
Jun 30, 2026 at 11:21 PM
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