Hi All, 

Been a while since my last visit as the car is or was faultless up to recent. Car is a 1.2TSi, '64 plate, circa 56k miles. About 3 months ago I detected a low frequency vibration, at first very quiet, now it is plainly noticeable. I cannot work out what is causing this noise. The 'vibration' occurs between 50 and 60 mph, recedes and reappears around 70. There is nothing felt through the steering wheel, the brakes are all fine, steering is fine, the vibration occurs whether under power or coasting, uphill, downhill or on the flat or cornering. Clutch is fine, gearchange too. I suppose the noise/vibration sounds a bit like a rear window is open and causing buffeting, that's the sort of noise. Can anyone come up with a suggestion as to what the issue is ? 

Thanks, Mike 

 

Inspect the tyres well.  Not just the tyre wall you can easily see the one were you need to be under the car or have the wheels off.  EDIT<

Not a bad idea pre winter servicing, wheels off and brakes, cleaned, pins greased anyway. Checking wheels come off.  You are looking for any bulge in the tyres.  Rear especially in your case.  Tyre out of shape.     Ps. Are the spark plugs ok? Changed or checked.  40,000 life, maybe more but they are consumables.  

Edited 2 October, 20223 yr by roottoot

Hi Roottoot,

 

Just finished removing the rears and found the problem. The tread has split in the middle of the width, for about a quarter of the circumference. Changed onto spare. I will take it for a road test, I hope that solves the problem. The tyres are well within tread depth with low mileage, I'll need to show them to my tyre man.

Thanks for your help, much appreciated.

 

Mike

Edited 2 October, 20223 yr by ktm690rr
more info

Remember, reset TPMS, with spare and then with again with tyres back to usual. 

HI,

 

Because I only looked for bulges, didn't look hard enough on the first wheel. I only noticed a problem in the second rear I looked at, decided to recheck the first wheel and low and behold exactly same break up of tyre tread. These tyres have covered 31.5k miles so I suppose they have done enough miles, got to say there are a few mm left on the treads right across the width.

Again many thanks for your assistance.

Despite the other machinery in our garage, the Roomy has a place in my heart.

 

Cheers, Mike

@ktm690rr

What tyres are these? 

& had they ever been on the front and moved to the rear?

 

http://briskoda.net/forums/topic/506196-tyre-damage

http://briskoda.net/forums/topic/505352-deteriorating-front-tyres

 

Pirelli Centurato P1. These tyres were fitted to the rear on 23rd Nov '19 and have remained there throughout. I am a bit disappointed that they should fail with so much tread left.

 

Mike