All four wheels potentially not keeping correct pressure
All four wheels potentially not keeping correct pressure
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p1tse

Original Poster:

1,412 posts

221 months

Saturday 29th March 2014
quotequote all
Picked up a car a couple of weeks ago, topped up to the correct pressures last week and checked them again an all have gone down
I put 42psi front and 37psi rear
Come to check it fronts have dropped to about 35psi and the rears had dropped a little too


Any advice on what to check, keep an eye on if it really is happening and if it is how to find out reasons?

Shaw Tarse

31,887 posts

232 months

Saturday 29th March 2014
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All checked on same gauge?
Leaky valves?
Nails in tyres?

skelters

423 posts

163 months

Saturday 29th March 2014
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Perhaps an Elephant has been sitting on the car at night.

Any dents in the roof?

anonymous-user

83 months

Saturday 29th March 2014
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Quite a number of modern cars are fitted with split rim wheels, or wheels that are polished alloy with a clear coat over them (Audi/VW/BMW etc) which is fine until they have experienced a few British winters and the salt has totally knackered them.

They then begin to leak air from the split rim joint, or from around the rim where the tyre bead meets the wheel.

There is nothing you can do in these cases apart from have all 4 wheels refurbished, at a cost that probably exceeds simply buying a new set of wheels.

Manufacturers need to learn to stop fitting UK vehicles with wheels that do not agree with our salty roads. VW got burned over this a few years ago and had to replace hundreds of sets of golf alloys under warranty but they haven't learned...

The above is of course assuming that it it's just a puncture on all 4 tyres wink

Escort3500

13,470 posts

174 months

Sunday 30th March 2014
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NinjaPower said:
Quite a number of modern cars are fitted with split rim wheels, or wheels that are polished alloy with a clear coat over them (Audi/VW/BMW etc) which is fine until they have experienced a few British winters and the salt has totally knackered them.

They then begin to leak air from the split rim joint, or from around the rim where the tyre bead meets the wheel.

There is nothing you can do in these cases apart from have all 4 wheels refurbished, at a cost that probably exceeds simply buying a new set of wheels.

Manufacturers need to learn to stop fitting UK vehicles with wheels that do not agree with our salty roads. VW got burned over this a few years ago and had to replace hundreds of sets of golf alloys under warranty but they haven't learned...

The above is of course assuming that it it's just a puncture on all 4 tyres wink
Interesting; didn't know about the VW problem. Not sure you could buy a new set of rims (assuming alloy) for less than a refurb though.

Poopipe

619 posts

173 months

Sunday 30th March 2014
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A lb or two could be down to temperature or just innacuracies in your pressure gauge (footpumps are generally crap for example)

Losing more and id make sure the bit in the middle of the valves was tight before looking anywhere else - you can just pop a wee screwdriver in and twist them round if they're loose

anonymous-user

83 months

Sunday 30th March 2014
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Escort3500 said:
Interesting; didn't know about the VW problem. Not sure you could buy a new set of rims (assuming alloy) for less than a refurb though.
A recent example was a friend a work has a 2009 Audi A3 S-Line which has the 18" split rim BBS wheels on it that are standard on that model.

The wheels were knackered from salt getting under the thin layer of lacquer, and she started suffering the slow loss of air from 3 wheels.

As they were polished split rims, a proper refurb was going to be in excess of £150 per wheel, IF you could find a bodyshop willing to do it as they weren't just a 'normal' set of wheels that you sand down and paint.

So instead she bought a brand new set of replica alloys in exactly the same size but a different Audi style (RS6 type) for £400 inc delivery.

Welshbeef

49,633 posts

227 months

Sunday 30th March 2014
quotequote all
NinjaPower said:
A recent example was a friend a work has a 2009 Audi A3 S-Line which has the 18" split rim BBS wheels on it that are standard on that model.

The wheels were knackered from salt getting under the thin layer of lacquer, and she started suffering the slow loss of air from 3 wheels.

As they were polished split rims, a proper refurb was going to be in excess of £150 per wheel, IF you could find a bodyshop willing to do it as they weren't just a 'normal' set of wheels that you sand down and paint.

So instead she bought a brand new set of replica alloys in exactly the same size but a different Audi style (RS6 type) for £400 inc delivery.
And therein lies the difference you cannot compare OEM to replica - new OEM is much more than refurb. Copies sure are a lot less will it impact residual value or will she pull out that invoice from the service history....

anonymous-user

83 months

Sunday 30th March 2014
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Welshbeef said:
NinjaPower said:
A recent example was a friend a work has a 2009 Audi A3 S-Line which has the 18" split rim BBS wheels on it that are standard on that model.

The wheels were knackered from salt getting under the thin layer of lacquer, and she started suffering the slow loss of air from 3 wheels.

As they were polished split rims, a proper refurb was going to be in excess of £150 per wheel, IF you could find a bodyshop willing to do it as they weren't just a 'normal' set of wheels that you sand down and paint.

So instead she bought a brand new set of replica alloys in exactly the same size but a different Audi style (RS6 type) for £400 inc delivery.
And therein lies the difference you cannot compare OEM to replica - new OEM is much more than refurb. Copies sure are a lot less will it impact residual value or will she pull out that invoice from the service history....
No, of course you can't compare them. The single piece replicas will last twice as long before needing refurbed than the originals.

Welshbeef

49,633 posts

227 months

Sunday 30th March 2014
quotequote all
NinjaPower said:
No, of course you can't compare them. The single piece replicas will last twice as long before needing refurbed than the originals.
But the car will never be concours or Classique for those Ferraris.

Guess for run of the mill cars its utterly irrelevant unless they are blinded up.