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Old June 14th, 2018, 19:20   #1
Join Date: Jun 2018
Location: Missouri
Default Fun noise under the hood

So a week ago I was driving down the interstate in my 06 Jetta TDI with 106,000 miles, cruise control on, when I hear what sounds like nuts and bolts flying out from under my car. I stopped go check it out and only seen that my engine cover was loose so I took it off and tossed it in the trunk for the time being. Then the real fun began. After getting to the town I was heading to, I start to hear this fun new noise like a tin on hollow steel sound. Like someone is putting a pencil into a metal fan. But, it only does it when I decelerate, or let my foot off of the gas pedal, and it only does it between roughly 15 and 55 mph. The noise stops as soon as I push on the accelerator and depending on the speed when letting off, it starts immediately as t varying volumes. I have a video of me recreating the sound going about 20mph in my neighborhood so I hope you can hear it. It doesn't do it when in neutral or park and if it is making the noise in drive, it will stop immediately if I shift into neutral.

Here is the link for the video
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Old June 14th, 2018, 19:47   #2
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Join Date: Jan 2017
Location: Burlington Vt

Give the pulleys a Check over, or maybe a loose belt rubbing on something. Youíre warning sound probably wonít last long.
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Old June 14th, 2018, 19:47   #3
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Join Date: Jan 2005
Location: Madison, Wisconsin
Fuel Economy: 48/43/39/

I would drop in to the closest friendly transmission repair shop to have that eliminated as the problem. I do hope it is eliminated. If not, get a written estimate of repairs. Then leave and report back.
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Old June 15th, 2018, 04:29   #4
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Join Date: Aug 2004
Location: Northern Minnesota-55744
Fuel Economy: 52+ average lifetime '01

Any vibration in the floor pan? A failed dog bone engine/transaxle mount will make for some "interesting" noises. As will other broken engine mounts due to failure to change out the one time use bolts during affected services.

2001 Jetta TDI GLS Silver-current driver (salvage)permanently vented-Panzer Plate-Sprint 520s-ScanGauge-CheckTemp III-ZeroStart heater-CAT 2 filter
2003 Jetta GLS Black w/leather (New Project Car) fixer-upper w/broken TB
2004 Cadillac SLS (wife's)
1999 GMC Suburban (It's MN-you need one)
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