Tyre troubles - HELP!
Discussion
New member to PH and hoping to blag some advice:
I have a 1996 Megane Coupe (2lt 16v) with 87k on the clock and i'm having serious tyre probs.
The rear tyres lose airat a dangerous rate, upto 6PSI per week and thats whether i do 100 miles a week or it just sits in the drive!
The tyres in question are some shitty budget jobbies that the previous owner thought were a good idea!
My local tyre place, (who are great not the usual rehabilitated car thieve types) spent two hours taking them apart and running every test they have - no faults to be found!
Please help - i need ideas as to whats wrong!?
Thanx.
P.S: The car just passed an MOTwithout fault and has had an extra suspension, steering etc check and tracking done.Problem persists!
I have a 1996 Megane Coupe (2lt 16v) with 87k on the clock and i'm having serious tyre probs.
The rear tyres lose airat a dangerous rate, upto 6PSI per week and thats whether i do 100 miles a week or it just sits in the drive!
The tyres in question are some shitty budget jobbies that the previous owner thought were a good idea!
My local tyre place, (who are great not the usual rehabilitated car thieve types) spent two hours taking them apart and running every test they have - no faults to be found!
Please help - i need ideas as to whats wrong!?
Thanx.
P.S: The car just passed an MOTwithout fault and has had an extra suspension, steering etc check and tracking done.Problem persists!
"Cracked or porous rims"
Would this not have shown up when the tyre guys were felting? They did a test were they submerged the the tyres and forced air into them to see if any was escaping, non did, they then deflated them and inflated underwater, again no air escaped.
Thanx anyways.
Would this not have shown up when the tyre guys were felting? They did a test were they submerged the the tyres and forced air into them to see if any was escaping, non did, they then deflated them and inflated underwater, again no air escaped.
Thanx anyways.
OK so no bubbles...
Make sure that you always check the tyre pressures at the same temperature...you may find that you no longer have the problem!
Assuming the valves are OK and there are no punctures, the most common problem with slowly deflating tyres is corrosion on the wheel rims. 
Corroded wheel rims are ironically most often found on infrequently used cars.
There are a number of mobile wheel finishers who will skim and restore your wheel rims...if you have the entire wheel done it will cost you about 50 quid for each wheel...but they will look like new!
Hope this helps and good luck!
Toffer
>> Edited by Toffer on Saturday 28th September 12:37
Make sure that you always check the tyre pressures at the same temperature...you may find that you no longer have the problem!
Assuming the valves are OK and there are no punctures, the most common problem with slowly deflating tyres is corrosion on the wheel rims. Corroded wheel rims are ironically most often found on infrequently used cars.
There are a number of mobile wheel finishers who will skim and restore your wheel rims...if you have the entire wheel done it will cost you about 50 quid for each wheel...but they will look like new!
Hope this helps and good luck!
Toffer
>> Edited by Toffer on Saturday 28th September 12:37
Do you have alloy wheels? I have a Mazda with alloys and the seal eventually moves very gradually creating greater than average pressure loss (about 10 psi per week)That may be the problem. If not I have absolutely no idea other than the wheels themselves must be faulty. If it is not the tyre, the valve or the seal then it must be the wheel.
You need to take them off the rim, clean the rims with fine wire wool where the tyre bead sits on the wheel rim, then refit them with some of that white stuff the tyre fitters paint all around the rim prior to re-fitting, making sure that the whole of the rims where they meet the tyres are covered with it.
That should do it. It pays to keep on the good side of the Police Vehicle Workshops who did mine for me.
That should do it. It pays to keep on the good side of the Police Vehicle Workshops who did mine for me.
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