wrong tyre pressures from dealer????
Discussion
i've got a boxtser s running on 18" carreras, upon checking the manual it recommends 2 and 2.5 bar (29 and 36 psi) for the front and rear tyres when cold.
went and checked mine today and the rears were at 3 bar (nearer 40odd psi) and one of the fronts was near 2.5.
I am using the wrong tyre pressures from the manual (i.e. are they for the 17" tyres that the car comes with as std) or have the dealership pumped my tyres up far too much?
went and checked mine today and the rears were at 3 bar (nearer 40odd psi) and one of the fronts was near 2.5.
I am using the wrong tyre pressures from the manual (i.e. are they for the 17" tyres that the car comes with as std) or have the dealership pumped my tyres up far too much?
Under the front bonnet is a sticker listing what the pressures should be.
AFAIK its 36 at the back regardless of rim size.
Likely the dealer didn't check when cold and over inflated a bit. I wouldn't lose too much sleep over it - after all, you checked yourself and found a discrepency.
Ignore Domster BTW - anything later than a 964RS and he's probably guessing anyroad
AFAIK its 36 at the back regardless of rim size.
Likely the dealer didn't check when cold and over inflated a bit. I wouldn't lose too much sleep over it - after all, you checked yourself and found a discrepency.
Ignore Domster BTW - anything later than a 964RS and he's probably guessing anyroad
rsvr1000 said:
the 18" carreras were no more than £700ish? a different set were on the car at new and i refused to buy it unless they swapped them over to the best looking boxster alloys!
In this instance the pressure rating found under the bonnet or inside the petrol flap on the 996 will have the pressures stated for the alloys on the car when it left the factory. Check against a boxter which came with the 18s when it left the factory.
Can anyone in PHland with the correct spec Boxster confirm the pressures on 18 inch alloys?
DAZ
arwebs said:
You may be doing this already, but apart from checking pressures when cold also use a decent pressure gauge. I checked mine at the weekend on a garage forecourt and they were about 7psi different to that shown on my own gauge.
It's an odd quirk of 'free' compressed air pumps on garage forecourts that they don't have to be accurate, and so rarely are. Digital gauges are very accurate and seem to last a long time - I've had one 10 years, and it still works on the original (non-replaceable) battery.
steve-p said:
It's an odd quirk of 'free' compressed air pumps on garage forecourts that they don't have to be accurate, and so rarely are. Digital gauges are very accurate and seem to last a long time - I've had one 10 years, and it still works on the original (non-replaceable) battery.
I would take issue with your statement, as an ex manager of petrol stations, all our airlines were regularly checked and calibrated. This was based on the fact that the garage could be found negligent if an accident was found to be caused by incorrect tyre pressures following inflation from our airlines.
your garage appeas to be an exception to the norm kevin in terms of accuracy....I thought thay were regulated by the authorities but had a 10% tolerance margin.
When you have 44 pound rear tyres on your porker,,,to the nearest 10% you would possibly be closer guessing than relying on a guage that may be that far out.
When you have 44 pound rear tyres on your porker,,,to the nearest 10% you would possibly be closer guessing than relying on a guage that may be that far out.
My local optimax dealer has a digital tyre pressure machine where you put in the pressure you want, press the button and allah kazam! The readings match my tyre pressure gauge purchased for about £13 from my OPC. Oh and the petrol station next to the Ring, their tyre pressure reading is also accurate according to my gauge!
DAZ
DAZ
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