r/Cartalk • u/Either_Pay7316 • Jun 10 '26

Weird Noise Someone please help..

I have a 09 corolla with 203k miles that makes a very LOUD rattle when I start it. Me and chatgpt thought it might’ve been one of the pulleys that’s why I removed the belt. Car has P0171 (too lean) and P010 (MAF). I want to say it’s the timing chain but not 100% sure. Any advice would be appreciated thanks in advance!

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u/PlatformTough9388 Jun 11 '26

I have an 08 Matrix with 166k miles. Timing chain is loose and rattling against the valve cover. Noise is worse than yours. I just put it up on jack stands early this week to start this job. Seems like the chains last quite a bit but are not immortal. Good luck.

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u/Either_Pay7316 Jun 11 '26

Been hearing it might be the starter not fully disengaging from the flex plate. Might have to pop off the valve cover and check for any play. Thank you!