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Engine noise on start up while engine cold?

Tiny
JJ2007
  • MEMBER
  • 1995 MAZDA MX5
  • 4 CYL
  • 2WD
  • MANUAL
  • 100,180 MILES
The engine make a loud knocking noise when first started up in the morning. After several minutes the noise gets softer and eventually can not be heard.
Saturday, December 15th, 2007 AT 1:45 PM

2 Replies

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
One of two things, wrist pin on a piston or connecting rod bearing. My advice, drive till you can no more!
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Saturday, December 15th, 2007 AT 2:29 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,513 POSTS
I would make sure the engine oil is clean and full. Then I would add two bottles of lucas engine oil treatment. Also, please go over this guide.

https://www.2carpros.com/articles/engine-noises

Please go over this guide and get back to us.
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Monday, October 28th, 2024 AT 5:45 PM

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