OmarG Posted November 26, 2007 Share Posted November 26, 2007 Hey yall! I hope everybody's cars are doing ok. I have a problem with a friend of mines LS400. Ok her tensioner pulley went bad so she got a replacement from autozone. Autozone's part didn't fit correctly (didnt spin) and overheated the serp belt. So we replaced the pulley with a used OEM one and replaced her belt as well. I checked all the pulleys and fan bracket. All move smoothly. But the engine feels strained and for some reason there is lots of vibration. So i wanted to make sure the engine is ok and removed the serp belt and started the car. Smooth as butter(lexus smooth) I put the belt back on and vibration is back! all the pulleys move fine! I'm thinking the tensioner could be going bad. Mainly because her boyfriend put the austozone pulley and it started seizing to the point where it stopped spinning (for two days!... maybe). So maybe it put a ton of stress on the tensioner and wore it out and now its either too tight or not tight enough? Another possibility is the belt might be marginally bigger or smaller since its not OEM Toyota (cheapo autozone brand) and causing the vibration? Anybody got some insight? Is the tensioner easy to take off? Thanks so much Quote Link to comment Share on other sites More sharing options...
jzz30 Posted November 30, 2007 Share Posted November 30, 2007 it sounds like the engine and trans mounts are bad. Quote Link to comment Share on other sites More sharing options...
OmarG Posted December 1, 2007 Author Share Posted December 1, 2007 except there's no vibration when the belt is off. Quote Link to comment Share on other sites More sharing options...
pishta Posted December 1, 2007 Share Posted December 1, 2007 except there's no vibration when the belt is off. Is the fan operated off the belt (car is not here for me to check) look at the fan support bracket and maybe a out of balance fan,missing a blade or something similar Quote Link to comment Share on other sites More sharing options...
OmarG Posted December 3, 2007 Author Share Posted December 3, 2007 i actually called JM lexus and a tech guy said he though it was 90% fan related. Sure enough it was the fan bracket dying. It disintegrated on saturday. We got a junkyard replacement and all is dandy. Quote Link to comment Share on other sites More sharing options...
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