Slow Puncture

[Scouser51]

Hi fellow Mercedes owners, posting this for my son who has just bought a pre owned C Class cabriolet. He’s only had it two weeks, it came fitted with four new tyres. He is asking can a possible slow puncture be repaired?
Any rapid advice would be very much appreciated.

 

[AMGeed]

Provided the repair is across the main part of the tread, it should be able to be repaired with a plug.
I had one done recently for £20.
Any hole close to the shoulder of the tyre then, its a new one.

 

[Trickythemerc]

Depends on where the tyre is punctured ? First check would be leaking valve core or badly seated tyre. Get a check done by a tyre specialist.

 

[Smart320]

I have recently fitted our Rav with 5 new Michelin Coss Country tyres. . After a week got a screw through one of the rear tyres, having had 5 years on worn tyres without a problem.
Think that the new softer rubber just much more likely to pick up debris.
Mine was repaired as it was in the middle of the tyre not the sidewall, cost £20.
Slow puncture could be something similar, faulty valve or a badly fitted tyre or even a cracked rim,
Needs looking at either by the garage that sold it or your local tyre depot

 

[rf065]

May not be a puncture, depending on age, the alloys can corrode and air can escape between the tyre and the wheel rim. do the wheels look OK?

 

[markjay]

As above.

Foreign object - find the puncture, and repair if possible

Leaking valve - replace the valve

Leaking rim - remove tyre, clean rim, refit with sealant

Cracked rim - inspect, then weld or replace as needed

Porous tyres - replace tyres

A tyre fitter will inflate the tyre to 50 psi (or thereabouts) then place it in a tub of water, and presto the source of the leak will reveal itself.

 

[AMGeed]

I would expect any tyre fitting outfit would remove the wheel and immerse it in a drum of water to find the leak anyway.
As mentioned it could be a number of possibilities other than an actual puncture.

 

[geoffus]

One of my tyres had a slow deflation, turned out to be leaking around the tyre rim.
The local tyre fitter removed the tyre, cleaned all the inner wheel rim with a mild abrasive wire brush, painted on some black sealer, refitted and balanced the lot for £25, that fixed the leak.

 

[Mark9999]

One of my tyres had a slow deflation, turned out to be leaking around the tyre rim.
The local tyre fitter removed the tyre, cleaned all the inner wheel rim with a mild abrasive wire brush, painted on some black sealer, refitted and balanced the lot for £25, that fixed the leak.

I had this problem with my old mk1 mx5. Cleaning the inner rim and reseating the tyres worked for a few weeks only. I ended up with 4 new wheels.
Don’t forget to check the Schrader valve under the valve cap - soapy water or a bit of spit will do the trick.
Mark

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[alabbasi]

Take it to a tire shop and they will find a leak by dipping the wheel in a big tub of water and watching where the bubbles are coming from.