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I have a 04 corolla 46,00 hear a rattling noise from passenger side under hood thought it could be from belt tensioner . brought to dealership they said tensioner fine., but still making noise any suggestioner or ideas. john
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You broke your serpatine belt. Needs replacing. It's a $50ish part and easy to do if you have a diagram under the hood of how the belt fits. But if it was "rattling" for a couple of weeks take it in for crying out loud. Let the mechanic look it over to make sure your lack of vechile care didn't destroy anything under the hood.....
Yes, you apparently heard the belt as it came apart. You can look around the path of where you heard the noise and see if there is any obvious damage but usually, there are just a few marks unless a small wire or hose are in the path of the belt. good luck
You 98 Corolla has a timing chain that it internal and need no normal maintenance. It uses a hydraulic/spring tensioner to keep things tight and as long as its quiet, everything is fine. Your drive belt (not to be confused with a t. belt) is the external belt you see on the passenger side of the engine. It drives you alt, water pump, A/C and power steering. It uses a spring loaded tensioner to keep the belt tight. These can weaken over time and cause a rattle noise and belt slippage.
Have you checked your belts? A piece of belt may have come off and been slapping under your hood, and then fell off completely. While it was slapping, your computer would have detected the slow down of pulleys etc. and caused your engine light to come on. Then when the piece broke off, everything would be back to normal. Let me know!
not likely possibly the cover for torque converter may be loose. if rattling coming from pass. side may be belt tensioner/or water pump. to check shut engine off remove serp. belt check water pump pulley for play by wiggling back an forth do same with belt tensioner. check trans fluid level while on level surface engine warm&running tranny in park. some gm cars have had problems with crank shaft pulleys making rattling noise also.
I have the same issue with my 2004 maxima.The service techs said it was the timing chain tensioners .Since they are hydaulic and they powered by the oil in the car .It is recommended to purge the the engine every time the noise starts to come back. I brought some an it really freaking work because I started to run it into a tree and go buy a toyota
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