[ashthedivx]

Recently i had a delhi-shahranpur tour on my chevy optra, i faced some issues which sounded new to me..

a) High tyre noice while driving at high speed is too high, didn't noticed it too much before - Any solutions, apart from changing the tyres ?

b) Their was strange wobel sound from backside i.e. back tyres while braking from high speed, which certainly reduces comfortability level while braking - Is it something to do with proper alignment ??

I usually drive at high speeds, so i need to sort out these particular issues so as to make myself comfortable at braking during high speeds.

[kpzen]

Ashish

What tyres do u have in your Optra?
How many kms have they done?

[Gangsta]

Originally Posted by ashthedivx

Recently i had a delhi-shahranpur tour on my chevy optra, i faced some issues which sounded new to me..

a) High tyre noice while driving at high speed is too high, didn't noticed it too much before - Any solutions, apart from changing the tyres ?

b) Their was strange wobel sound from backside i.e. back tyres while braking from high speed, which certainly reduces comfortability level while braking - Is it something to do with proper alignment ??

I usually drive at high speeds, so i need to sort out these particular issues so as to make myself comfortable at braking during high speeds.

Try changing tyres like front to the back or left to the right. I was getting similar problem in my Elantra. Now its been fixed by doing this itself.

[1100D]

Does the wobble/vibration while braking from high speed also get transferred to the steering wheel. If yes, you need to replace the brake rotors/disks.

Tyre noise can also be due to stones being attached to the grooves, please check. Otherwise its a characteristic of the tyre (either by design or by usage) needing replacement.

[rks]

Originally Posted by ashthedivx

a) High tyre noice while driving at high speed is too high, didn't noticed it too much before - Any solutions, apart from changing the tyres ?

Tyre noise could be normal for the tyres that your run. If you feel it is abnormal, check your tyre pressures. Tyres can get noisy if pressures are too low. Apart from this, the only solution is a tyre change.

b) Their was strange wobel sound from backside i.e. back tyres while braking from high speed, which certainly reduces comfortability level while braking - Is it something to do with proper alignment ??

Apart from the suggestions so far, check alignment+wheel balancing. Get your brakes serviced. Are you using after-market alloys? These could cause vibrations while braking from high speed, if the specs are not OK. Check your wheels for any damage/bends (especially if they are stock steel rims). This could cause vibrations while braking.

Check your tyres for damage/tread wear/flat spots and replace if necessary.

[ashthedivx]

Originally Posted by kpzen

Ashish

What tyres do u have in your Optra?
How many kms have they done?

Prajesh,

I am running on Bridgestone. Not sure the series name.
So far they have done around 20K km as they got changed by my cousin to whom car was lended in that particular period, Rent was free tyres

Originally Posted by Gangsta

Try changing tyres like front to the back or left to the right. I was getting similar problem in my Elantra. Now its been fixed by doing this itself.

Will give a try to tyre rotation this weekend. Which tyres your elantra is having.

[ashthedivx]

Originally Posted by 1100D

Does the wobble/vibration while braking from high speed also get transferred to the steering wheel. If yes, you need to replace the brake rotors/disks.

No, it doesn't but the strange sound looks like something like... thud..thud... thud....

Originally Posted by 1100D

Tyre noise can also be due to stones being attached to the grooves, please check. Otherwise its a characteristic of the tyre (either by design or by usage) needing replacement.

hmm.. will check the grooves and let you know. However, i am planning for tyre rotation.

[Gangsta]

Originally Posted by ashthedivx

Prajesh,

I am running on Bridgestone. Not sure the series name.
So far they have done around 20K km as they got changed by my cousin to whom car was lended in that particular period, Rent was free tyres



Will give a try to tyre rotation this weekend. Which tyres your elantra is having.

GoodYear.. Stock Size

[ashthedivx]

Originally Posted by rks

Tyre noise could be normal for the tyres that your run. If you feel it is abnormal, check your tyre pressures. Tyres can get noisy if pressures are too low. Apart from this, the only solution is a tyre change.

I usually maintain a tyre pressure of 34-PSI at front and 32-PSI in rear, i hope it is correct for chevy optra. Earlier i use to keep 32-PSI in front and 30-PSI in rear, which resulted in low pickup and heavy moving. Upgrading the tyre pressure helped in avoiding such problem.

Originally Posted by rks

Apart from the suggestions so far, check alignment+wheel balancing. Get your brakes serviced. Are you using after-market alloys? These could cause vibrations while braking from high speed, if the specs are not OK. Check your wheels for any damage/bends (especially if they are stock steel rims). This could cause vibrations while braking.

Check your tyres for damage/tread wear/flat spots and replace if necessary.

I am on stock rims, i am too even somehow inclined towards getting the alignments and balancing re-done which was initially done in showroom at the time of service around 4K kms back.

Rear tyres were checked for the damages and punctures on last weekend only, as this week's tour was in cards from last month. Tyres were fine without any damage or flat spot.

[ashthedivx]

Originally Posted by Gangsta

GoodYear.. Stock Size

How many kms have they covered, did the problem arose again ?

[Gangsta]

Originally Posted by ashthedivx

How many kms have they covered, did the problem arose again ?

It was very much recent, like 2 week back i was getting this problem then after that i havnt faced this problem. Car is rock steady above 170 kmph too. This set of tyres had done just 9k KM.

Also, check the car's alignement and wheel balancing and before doing it ask them to rotate the tyres accordingly.

[ashthedivx]

Got the rear wheel alignment and tyre rotation yesterday, problem seems to be solved Rear wheel alignment was too much out, according to the tyre guy!!

Though the guy has asked to get the drum checked as an precautionary measure.

[gkveda]

I recently changed the brake pads as well as brake shoes for my Qualis (at 75,000 Kms).

When this was done, Mechanic performed the Brake Drums Skimming (Nothing on Discs). Post skimming, Car shudders and Vibrations can be noticed moderately on the dashboard while braking at high speed and at full load(Read: above 70 Kmph and 7 people)

Per my understanding the Shuddering should stop when the brake drums are skimmed in Lathe. But, it has started shuddering post skimming.

Where could be the problem? Will it be improper Drum skimming OR Faulty Brake shoes
Or something else ? experts, Please advise

Also, please let me know if the drum skimming is found to be improper, can I get another round of Skimming(This will be second time, drums will be skimmed. They were never skimmed earlier)? Is it advisable? Asking this question because, the thickness keeps reducing every time, it is skimmed.

[Mr.Boss]

Originally Posted by gkveda

I recently changed the brake pads as well as brake shoes for my Qualis (at 75,000 Kms).

When this was done, Mechanic performed the Brake Drums Skimming (Nothing on Discs). Post skimming, Car shudders and Vibrations can be noticed moderately on the dashboard while braking at high speed and at full load(Read: above 70 Kmph and 7 people).

What is the mileage post skimming / brake shoe replacement? There are possibilities that judder may reduce after few hundred km running (Experienced on 2 wheeler post skimming)

Originally Posted by gkveda

if the drum skimming is found to be improper, can I get another round of Skimming(This will be second time, drums will be skimmed. They were never skimmed earlier)? Is it advisable? Asking this question because, the thickness keeps reducing every time, it is skimmed.

If the machining defect is on the surface finish, another machining should be fine. If the defect is on the run-out or cylindricity, material removal will be on the higher side. Check for recommendation from manufacturer on the minimum thickness of drum (should be available with A.S.S as a guideline / criteria for replacement)