Go Back   Team-BHP > Under the Hood > Technical Stuff


Reply
 
Thread Tools Search this Thread
Old 11th February 2009, 11:08   #1
BHPian
 
weejai's Avatar
 
Join Date: Apr 2007
Location: Bangalore/Mumbai
Posts: 88
Thanked: 3 Times
Default Disc brake clean-up/change for OHC

For the last two months or so now, at speed of 100km/h or more when breaks are applied, there is high vibration that disappears when the speed comes down to about 60km/h. I understand this is casued by 'Warping' of disc. I need advice on the following:

1. The disc can be examined for any rust or uneven surface and if only a service will be sufficient, this would be the simplest.

2. If I need to change the disc, can I opt for ventilated disc instead of the regular one in OHC? Given Mumbai climate, will ventilated disc catch rush faster than the regular one (in the holes)?

3. Are there cars whose disc can fit into OHC well & will enhance breaking?

4. Does bigger disc mean better breaking without any other damage to the car? If yes, what size will fit into OHC?

5. Since OHC breaks are not so great, are there any enhancement (not requiring major changes or holes in the pocket) that will help?

6. Most importantly, have I understood the problem right and if yes, an expert to trust with the job in Mumbai
weejai is offline   Reply With Quote
Old 11th February 2009, 14:32   #2
GTO
Team-BHP Support
 
GTO's Avatar
 
Join Date: Feb 2004
Location: Bombay
Posts: 47,709
Thanked: 89,162 Times
Default

Quote:
Originally Posted by weejai View Post
there is high vibration that disappears when the speed comes down to about 60km/h. I understand this is casued by 'Warping' of disc.
Yup, basically your discs have an uneven surface. Most likely cause is that you didn't change your brake pads on time. Cheap & recommended solution : Get the brake discs "skimmed" and a set of new pads. If you want to upgrade your brakes, have a look at this thread (Improving your car's brakes: Options and costs). Lotsa useful information over in that discussion.
GTO is offline   Reply With Quote
Old 11th February 2009, 15:54   #3
BHPian
 
ssjr0498's Avatar
 
Join Date: Mar 2006
Location: Blr-Ccu
Posts: 642
Thanked: 118 Times
Default

Hi,

without starting any fights here, I wanted to ask you a quick question! What makes you say that the ohc brakes are not good? IMO they are among the best provided your car has good shoes, effortless braking. The stock tyres are not that great, but the braking is kick@$$.
Maybe you are feeling the pinch because your brake shoes/ disk has gone!!

Cheers
Shrey
Quote:
Originally Posted by weejai View Post
For the last two months or so now, at speed of 100km/h or more when breaks are applied, there is high vibration that disappears when the speed comes down to about 60km/h. I understand this is casued by 'Warping' of disc. I need advice on the following:

1. The disc can be examined for any rust or uneven surface and if only a service will be sufficient, this would be the simplest.

2. If I need to change the disc, can I opt for ventilated disc instead of the regular one in OHC? Given Mumbai climate, will ventilated disc catch rush faster than the regular one (in the holes)?

3. Are there cars whose disc can fit into OHC well & will enhance breaking?

4. Does bigger disc mean better breaking without any other damage to the car? If yes, what size will fit into OHC?

5. Since OHC breaks are not so great, are there any enhancement (not requiring major changes or holes in the pocket) that will help?

6. Most importantly, have I understood the problem right and if yes, an expert to trust with the job in Mumbai

Last edited by ssjr0498 : 11th February 2009 at 15:56.
ssjr0498 is offline   Reply With Quote
Old 11th February 2009, 16:11   #4
Distinguished - BHPian
 
Tejas@perioimpl's Avatar
 
Join Date: Sep 2008
Location: Bombay
Posts: 3,964
Thanked: 4,885 Times
Default

Agree with GTO. Check out the thread as well.
Cross drilling should not affect the life.
But all depends on your driving style. If you are into normal driving, then the OEM brakes are good. Just get the rear brakes serviced and maybe replace the front disc and pads with again an OEM one. ssjr0498 is right. Stock brakes for stock engine is adequate.
Only if you are high revving with start stop dashes should you consider upgrading.
Tejas@perioimpl is offline   Reply With Quote
Old 11th February 2009, 17:09   #5
BHPian
 
weejai's Avatar
 
Join Date: Apr 2007
Location: Bangalore/Mumbai
Posts: 88
Thanked: 3 Times
Default

Went through the thread, was informative, though I need more info on some of the specific questions.

Shrey: I am unhappy with the breaks probably because as you have said, they have worn out and i'm unable to appreciate them. I'll experience the difference afte the change

Tejas: I'm into normal driving and at high speeds, it is calculated driving and never impulsive with nothing to prove to others on the road. Since I was getting it serviced, I thought it was good to know if ther was a better option available.
weejai is offline   Reply With Quote
Old 11th February 2009, 17:32   #6
Distinguished - BHPian
 
Tejas@perioimpl's Avatar
 
Join Date: Sep 2008
Location: Bombay
Posts: 3,964
Thanked: 4,885 Times
Default

I see in your signature that you have a 1.3 OHC with no performance mods. Suggest you service the brakes and replace with OEM ones if required.
Tejas@perioimpl is offline   Reply With Quote
Old 11th February 2009, 17:39   #7
Senior - BHPian
 
pranavt's Avatar
 
Join Date: May 2008
Location: Mumbai
Posts: 1,628
Thanked: 272 Times
Default

Drilling brakes will cause micro-fractures in the rotor. Not advised by some respected tuners here. Getting better pads and ventilation should be enough to give much better braking.
pranavt is offline   Reply With Quote
Old 11th February 2009, 17:43   #8
Senior - BHPian
 
Dippy's Avatar
 
Join Date: Feb 2004
Location: Mumbai, India
Posts: 7,269
Thanked: 163 Times
Default

weejai,

I dont think you need to change the discs. Just get a good service done the brakes, skim the discs and replace your old set of pads with a new one. That should be enough. Unless you are in for some really high speed driving which I dont think you are, I would not recommend a brake upgrade. Stick to OEM.
Dippy is offline   Reply With Quote
Old 13th February 2009, 16:59   #9
BHPian
 
weejai's Avatar
 
Join Date: Apr 2007
Location: Bangalore/Mumbai
Posts: 88
Thanked: 3 Times
Default

Checked with Linkway:

New Break Pads: 3500
Disc check for skimming: 500
Labor: 1000
Add Tax

Checked local mechanic:

New Pads: between 1300 to 3500
Skimming: 500
Labor: 500

Checked RoadWrx, the multibrand workshop

New orginal pads: 3500 (20% discount on that)
Skimming: 350
Labor: 500 (includes rear break check and cleaninng)

Took appointment with Roadwrx (walkable distance from my home) for tomorrow. I should be able to share the difference by next week.
weejai is offline   Reply With Quote
Old 16th February 2009, 09:20   #10
BHPian
 
weejai's Avatar
 
Join Date: Apr 2007
Location: Bangalore/Mumbai
Posts: 88
Thanked: 3 Times
Default Fixed

Got the discs skimmed, the break pads of all four wheels had worn out, got all four replaced, the braking seem to be better now. I'll know when I get a chance to drive at high speeds.

Also, I was told that a local break pad branded 'Elite' costs only Rs.650. I did not see it good to take chance with the breaks, so went with the original ones.

Front break pads: 3500
Back break pads: 1800
Skimming: 350
Break liner: 500
Labor: 500

The prices above are including tax. A 'free' car wash was given and some 'chota-mota' fixes here and there.
weejai is offline   Reply With Quote
Old 16th February 2009, 09:59   #11
BHPian
 
Shashank.A's Avatar
 
Join Date: Sep 2007
Location: New Delhi
Posts: 479
Thanked: Once
Default

what, OHC pads are 3.5k :o
Shashank.A is offline   Reply With Quote
Old 16th February 2009, 10:14   #12
Senior - BHPian
 
KSM-Vtec's Avatar
 
Join Date: Jun 2008
Location: MH-02-India-Bombay-Bandra
Posts: 1,563
Thanked: 437 Times
Default

Well Done..i am sure you have changed you opinion about the OHC breaking now....3.5k sounds a bit too much..but now that its done forget it.
KSM-Vtec is offline   Reply With Quote
Old 16th February 2009, 10:26   #13
Senior - BHPian
 
Dippy's Avatar
 
Join Date: Feb 2004
Location: Mumbai, India
Posts: 7,269
Thanked: 163 Times
Default

Quote:
Originally Posted by weejai View Post
Got the discs skimmed, the break pads of all four wheels had worn out, got all four replaced, the braking seem to be better now. I'll know when I get a chance to drive at high speeds.

Also, I was told that a local break pad branded 'Elite' costs only Rs.650. I did not see it good to take chance with the breaks, so went with the original ones.

Front break pads: 3500
Back break pads: 1800
Skimming: 350
Break liner: 500
Labor: 500

The prices above are including tax. A 'free' car wash was given and some 'chota-mota' fixes here and there.
When did the OHC get rear brake pads?

Anyways good to see the brake service completed. Where did you get it done though?

3.5 is high for brake pads though.
Dippy is offline   Reply With Quote
Old 16th February 2009, 10:44   #14
BHPian
 
weejai's Avatar
 
Join Date: Apr 2007
Location: Bangalore/Mumbai
Posts: 88
Thanked: 3 Times
Default

Well, the invoice does mention that. Also, I'd asked them to give me the parts that were replaced and I have them with me. I'll post the pic so let me know what it is called.

The prices, i did post the prices quoted to me here, since nobody said anything, I guessed they must be right. The servicing was done at RoadWorx, or Nummer Eins Motors, as they are known @ Andheri - E.
weejai is offline   Reply With Quote
Old 16th February 2009, 11:06   #15
Senior - BHPian
 
KSM-Vtec's Avatar
 
Join Date: Jun 2008
Location: MH-02-India-Bombay-Bandra
Posts: 1,563
Thanked: 437 Times
Default

this is what i paid for my stuff....another 300 for skimming...and the rear break service was covered in the full car service.

http://www.team-bhp.com/forum/techni...ml#post1118221 (OHC Suspension Problem EDIT : Solved!)
KSM-Vtec is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
DIY: Skoda Fabia Brake Disc / Rotor Change & 4th Service too! aayushnair DIY - Do it yourself 23 28th November 2015 13:26
Paint for disc brake pads & rear brake drums VC12 Modifications & Accessories 8 25th October 2011 17:18
Disk Brake to normal brake change? ramki067 Motorbikes 10 7th August 2008 14:19
Palio Mods (TC, ECM, & Rear Disc Brake Conversion) sbfx Modifications & Accessories 37 25th May 2007 20:11
disc brake lock up in OHC narayan Technical Stuff 10 27th January 2007 10:50


All times are GMT +5.5. The time now is 08:02.

Copyright ©2000 - 2017, Team-BHP.com
Proudly powered by E2E Networks