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jvcuenca

Upper Idler Engine Noise

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just thought I'd share what had happened to my 1998 porshce boxster. I've been hearing this engine noise that I thought was coming from my transmission. I called my mechanic friend and had him checked it out as well. He said he is 90 percent sure that it was my starter, not my transmission. So, I said ok. Let me buy the starter. So, I spent 200 something dollars and still waiting for the starter to get here. The noise kept getting louder and louder. I did a research here and most engine noise forums is directing to the starter. So, today while I was inspecting the engine(like I know what's really causing the engine noise) I happened to look at the serpentine belt. It looked like it was frayed and there was tiny bits of metal pieces on it. Took out the engine cover behind the seats and upon my inspection, the upper idler came loose. I don't know how it happened but the bolt is loose and the belt is not where it's supposed to be anymore. So, if you guys happen to hear an engine noise, don't just remove the cover from the top, also inspect the serpentine belt. Also, even though you have a mechanic friend, don't always take their word for it. Speaking of my friend, I will be giving him a call today and rub it in his face...biggrin.gif anyway, my question is, since my upper idler is completely gone, and I kept starting the car without realizing that the main culprit was the idler. Did I damaged anything else while it was running when the serpentine belt was out of it's place? Thank you

Edited by jvcuenca

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Depends on how long you left it running without a belt on, if the car overheated the damage might already be done. Important functions like water pump, etc. say that an engine with no belt or belt that is not taught enough will not last very long.

If the damaged belt was still on and doing it's function and the accessory pulleys were still rotating, chances are replacing the idler pulley, appropriate bolts (if the case or threads are not damaged), and a new belt and you'll be fine.

Also it sounds like you have a boxster, not a 996, you are in the carrera forum.

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thanks..and yes, I have a boxster..didn't realize I'm on the 996 forum...but as far as the car, I just start it and left it running for less than a few minutes then shut it off since it's making a lot of noise. Again thanks for the info..

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As long as the loose idler has not damaged the mounting boss, replacing both the idler and mounting bolt should fix the issue........

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As long as the loose idler has not damaged the mounting boss, replacing both the idler and mounting bolt should fix the issue........

thanks..just got the parts today..bolted the upper idler and placed the new belt...no more noise and everything is ok...

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