High Pitch Whine not Timing Chain - Maybe Throw-out Bearing? - Page 2 - Second Generation Nissan Xterra Forums (2005+)
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post #11 of 17 (permalink) Old 04-30-2019, 11:30 PM
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100% that's the timing chain guides in that last video. Sounds exactly like mine did on startup when they were worn down and I was at almost that exact mileage.

You can confirm that yourself, just get either a stethoscope or a long screwdriver and hold the handle end to your ear and the tip on top of the timing covers, move it around and the noise should be louder closer to the secondary chain guides and get quieter the further you move away.


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post #12 of 17 (permalink) Old 05-01-2019, 01:39 AM
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That last video made me nostalgic for my poor mans supercharger aka secondary timing chain guides worn to metal. That's where my money is.
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post #13 of 17 (permalink) Old 05-02-2019, 04:18 PM Thread Starter
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100% that's the timing chain guides in that last video. Sounds exactly like mine did on startup when they were worn down and I was at almost that exact mileage.

You can confirm that yourself, just get either a stethoscope or a long screwdriver and hold the handle end to your ear and the tip on top of the timing covers, move it around and the noise should be louder closer to the secondary chain guides and get quieter the further you move away.
So went in with a stethoscope today, hearing sound of a normal engine. No unusual sound of *grind grind, just the usual vroom vroom sound of an engine. The sound seems primarily coming from bottom of the car, not the engine bay. More of right underneath the driver seat. I do hear a supercharger like sound, but its more noticeable inside the cabin. Could this be a bad bearing? When you listen by the engine bay its not as loud as it is inside, I am still leaning toward something more underneath vs timing chain. Mechanic said it is an 8 hour job, $600 job, just to get to the transmission, my question, how long could I technically drive under such conditions? I figure worst case clutch goes out?
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post #14 of 17 (permalink) Old 05-02-2019, 05:10 PM
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So went in with a stethoscope today, hearing sound of a normal engine. No unusual sound of *grind grind, just the usual vroom vroom sound of an engine. The sound seems primarily coming from bottom of the car, not the engine bay. More of right underneath the driver seat. I do hear a supercharger like sound, but its more noticeable inside the cabin. Could this be a bad bearing? When you listen by the engine bay its not as loud as it is inside, I am still leaning toward something more underneath vs timing chain. Mechanic said it is an 8 hour job, $600 job, just to get to the transmission, my question, how long could I technically drive under such conditions? I figure worst case clutch goes out?
Oh ok, you'd have definitely heard the scraping with the stetho so I stand corrected. I do recall a car I owned in high school that made a turbocharger sound that came from the transmission, it turned out to be the filter was clogged with gunk. A transmission shop dropped the pan and cleaned it out but let me know it was a temp fix and the tranny was on the way out. Sure enough a few months later I was driving along doing about 65mph and out of nowhere it just slammed from OD into 1st gear. I was lucky to not have cars behind me because it was the equivalent of just slamming the brakes on.

Is the mechanic going to deduct that cost from a repair if that turns out to be it or is this just a standalone one time cost? 600 is a lot to pay just for a diagnosis if that's the case.


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post #15 of 17 (permalink) Old 05-03-2019, 01:50 PM
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It's a real shame mileage wise you just recently replaced the clutch, otherwise I'd say definitely do it while they're in there.

There are some that believe in replacing the rear main seal whenever the tranny is pulled off.
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post #16 of 17 (permalink) Old 05-03-2019, 03:06 PM
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^ Smart suggestion. That's the only oil leak I have but it's too big a job to do just for a small leak, since you'll have it out anyway it's a good time to do it even as a preventative measure.


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post #17 of 17 (permalink) Old 05-06-2019, 07:08 PM Thread Starter
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Oh ok, you'd have definitely heard the scraping with the stetho so I stand corrected. I do recall a car I owned in high school that made a turbocharger sound that came from the transmission, it turned out to be the filter was clogged with gunk. A transmission shop dropped the pan and cleaned it out but let me know it was a temp fix and the tranny was on the way out. Sure enough a few months later I was driving along doing about 65mph and out of nowhere it just slammed from OD into 1st gear. I was lucky to not have cars behind me because it was the equivalent of just slamming the brakes on.

Is the mechanic going to deduct that cost from a repair if that turns out to be it or is this just a standalone one time cost? 600 is a lot to pay just for a diagnosis if that's the case.
Well agree $600 is way too much to pay for diagnostic alone. Was driving today, and got a CEL code, 2 actual P0430 and P0455. Now I am totally confused. Need to replace all cats and 02 sensors, 2nd code not sure, could be as easy as loose gas cap, to Evap system. I wonder if this is related to the whine, could back cats produce this type of whine? Also when accelerating I hear a sort of wind noise (also underneath) It's more of Air flow kind of noise underneath the car... Maybe it is worth going to a different mechanic to get a 2nd opinion?
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