Vibration sound at certain rpm.

**anonymousmoose** · 12-07-2020, 07:52 PM

Took the VW Tiguan on a dirt track, light off-roading.

Now I can rear a vibration noise in any gear, between 2000-2500 rpm (even in neutral). Above/below this rpm range it's fine. It started right after the car was bumped around. Not heavily, it's an SUV after all.

I can hear it in the cockpit with doors closed, but not outside or with the doors open.

There is no jolts or vibrating feeling, it's just a noise.

Sounds like a bee buzzing madly.

Any ideas what it could be or help me diagnosis?

**Hillbilly** · 12-07-2020, 08:48 PM

I replied to you on WP

**anonymousmoose** · 12-07-2020, 11:06 PM

Originally Posted by Hillbilly

I replied to you on WP

Thanks

It sounds similar to the (except I can't hear it unless I'm in the car with doors closed)
YouTube

**anonymousmoose** · 13-07-2020, 02:52 PM

Interesting development. Noise is not there when the engine is cold. Develops when it gets warm/hot. No signs of overheating

**Lucas_R** · 13-07-2020, 03:13 PM

Originally Posted by anonymousmoose

Interesting development. Noise is not there when the engine is cold. Develops when it gets warm/hot. No signs of overheating

Exhaust is likely touching a heat shield. Exhaust pipe expands slightly when hot so makes sense that it wont touch when cold. Pretty common on the Tigs to have rattling heat shields near the exhaust.

**RaID** · 13-07-2020, 03:48 PM

Originally Posted by anonymousmoose

Interesting development. Noise is not there when the engine is cold. Develops when it gets warm/hot. No signs of overheating

Have you gotten any closer to determining what it is?

Something similar developed in my 162 Highline during a long road trip, has remained in the car ever since.

**anonymousmoose** · 13-07-2020, 04:59 PM

Originally Posted by RaID

Have you gotten any closer to determining what it is?

Something similar developed in my 162 Highline during a long road trip, has remained in the car ever since.

No, only happened yesterday. Booked in Wednesday.

Why didn't they fix it under warranty?

**RaID** · 14-07-2020, 08:31 AM

Originally Posted by anonymousmoose

No, only happened yesterday. Booked in Wednesday.

Why didn't they fix it under warranty?

I've got a service coming up, will raise it then. It hasn't annoyed me enough to get it sorted sooner

**anonymousmoose** · 14-07-2020, 06:08 PM

[*UPDATE*]

I canceled VW to look at it.

Drove the car home, noise was there at the rpm range described.

Got back to the city, had the car engine cleaned.

The I sprayed the undercarriage with my jet sprayer. Found an awful lot pebbles in the plastics under the car. Started smacking the plastics to loosen the stones. Jet sprayed what I could (I didn't have a ramp to crawl under the car).

Sprayed around the radiator to dislodge more leaves. Pushed the noise dampening foam back in. Gave parts of the engine another jet spray.

Result, no more noise during a 30 mins test drive, doing lots of 2000-2500 rpms.

If the noise returns, I'll have another look (also planning to get some ramps to lift the car).

**iDiesel** · 14-07-2020, 07:45 PM

I’ve heard about rocks in your head, but rocks in your plastic bits!!!
Ha ha, great to see you got to the bottom of it.
Nothing more annoying than noises in the car