Timing belt rattle - Lexus IS Forum
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post #1 of 2 (permalink) Old 01-02-2018, 11:17 AM Thread Starter
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Timing belt rattle

Hi everybody

Im working an a 2005 is300

I had a timing belt rattle, the belt would vibrate and shake at around 2500 RPMS and above, so I changed the timing belt, timing belt tensioner/pulley and the water pump to see if that would fix it, but i has not.

Does anyone know what it could be ?


Thanks !

PS I checked without the serpentine belt on so its not coming from the accessories
bocajrsbb8 is offline  
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post #2 of 2 (permalink) Old 01-02-2018, 12:21 PM
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Could be the VVTI pulley I guess. It's supposed to get oil from the oil control valve. When I replaced mine, it made a god-awful noise till it finally filled back up with oil. Might check the harmonic balancer too. They go bad as well.
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