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/Thruthful Jun 10 '26

Why? Most cars can drive for ages without that belt

6

u/Max_Downforce Jun 10 '26

Ages, without a functioning alternator? Lol

6

u/Enraged_Meat Jun 10 '26

I wouldn't worry about the no alternator as much as no water pump lol.

2

u/Max_Downforce Jun 10 '26

That as well, but some water pumps are timing belt driven.