Rotor runout

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Nov 12, 2003 | 07:17 AM

C3 - 81

Thread Starter

Instructor

Joined: Sep 2003

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From: Australind, Western Australia

Rotor runout

Just had both front rotors machined. The one on the car was'nt too bad but the one on the mat was at about .010" before machining. Also just removed rear trailing arms, Can anybody tell me the best way to get them back in as i'm not looking foreward to the reinstall. :banghead:

Nov 12, 2003 | 07:34 AM

norvalwilhelm

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Joined: Nov 2000

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From: Waterloo ontario Canada

Re: Rotor runout (C3 - 81)

In the last couple of weeks I have had my trailing arms in and out at least a dozen times for test fitting. I found that a good pair of pliers, not needle nose but flat pliers will grasp the through bolt. I align the trailing arm with a screw driver, lift the other spring end as high as possible and reaching under the trailing arm with the pliers I grasp the bolt and have really good luck sliding it into the hole.
Like I said I do this alot with installing coil overs so I have had lots of practice.
Do not install the rotor or caliper first. Keep the weight down.
Install the shims last after the through bolt in installed.

Nov 12, 2003 | 07:58 AM

C3 - 81

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Instructor

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From: Australind, Western Australia

Re: Rotor runout (norvalwilhelm)

Thanks for the info. When explained like that you make it sound easy.
Is there a set distance between centre-to-centre of trailing arms as when i removed the right side trailing arm months ago the shims got a bit mixed up.
Mick.

Nov 12, 2003 | 09:27 AM

Master Ho

Racer

Joined: May 2003

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From: KS

Re: Rotor runout (norvalwilhelm)

:iagree:

BTW, how does your creeper like that brick floor? :lol:

Nov 12, 2003 | 10:26 AM

GTR1999

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Joined: Aug 1999

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From: Connecticut, USA

Re: Rotor runout (C3 - 81)

What I do is use some dental floss and tie a loose knot in the end of the bolt. I fish it through with a coat hanger then pull the dental cloth/bolt through.
Works good.
Gary

Nov 12, 2003 | 11:43 AM

norvalwilhelm

Race Director

Joined: Nov 2000

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From: Waterloo ontario Canada

Re: Rotor runout (C3 - 81)

C3-81 it is easy once you get the hang of it. Luckily you don't need to practice. I have done it so often it is a few minute job with the pliers. I have never tired Gary's method but a few others use this method.
The shims are important. When I start from scratch I use a lazer level on the rotor to get the trailing arm pointed straight ahead but take it to an alignment shop. I take an assortment of my own shims to the shop because I doubt if many shops will have the shims in stock. I always use stainless shims. Being everything is fresh it is not a difficult job for the alignment guy but if the vet is old and nothing freed it is a miserable job.

Nov 12, 2003 | 05:42 PM

GaryS

Melting Slicks

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From: Moon Township PA

Re: Rotor runout (C3 - 81)

Buy me a plane ticket from the USA and I will do it for you for free. ;)

Gary

Nov 13, 2003 | 03:37 AM

C3 - 81

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Instructor

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From: Australind, Western Australia

Re: Rotor runout (GaryS)

Hi Gary, If i had the spare cash i would fly to you and have u show me over there & pick up a spare car while i'm at it. If u do manage to find a ticket call in, your most welcome.

Mick.