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Discussion Starter #1
I took my Z the dealer on Monday to have the leaky differential looked at for the third time. First two trips I was told the bolts were loose and that LocTite was not used. That obviously was not the case as they have now special ordered a "seal" that will arrive in 3 to 4 days. Rather than paying for a rental car for 5 days, they asked if I would pick my car up. Of course I said yes as I would rather have it than have sit on their lot for 5 days. Good thing to because it had bird shit all over it and was baking in the sun (90 degrees). As if that wasn't not bad enough, I had a flat tire by the time I got home. Used the repair kit and had it fixed this morning. Also, they apparently require 20 miles to test drive a car they couldn't fix in the first place. I made my opinions of their dealership known and will vent even more after they fix my beloved Z. Two questions;
1)Tire shop said now that my tire has a patch, it is not Z rated any longer. True??
2)Anyone know the GM part number to replace the sealant from the tire kit?
 

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Once a patch is put on a Z rated tire, it is no longer good at its speed rating.
A patch should have never been put on a high performance tire./phpBB/images/smiles/icon_frown.gif
I do not know the parts numbers.
 

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Discussion Starter #4
What is the recommended fix for the tire then? Also per the tire shop, plugging a tire is no longer legal in CA.
 

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This brings up a good question. How does one repair a Z rated tire? I had one patched on another car and the dealer told me that a patch was the ONLY WAY to go. He also said that plugging is very much out-dated and not reliable as was always told to me.
 

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I have had several tires repaired on my Formula and was told by more than one tire shop that if there was only one patch it would retain the rating, but putting more than one on there would drop it by a rating.

I watched at the plugged and patched the tires (each different time in) as they said using them both together was the best fix they had (short of a new tire). I never had any problems with them, but I didn't run much over 100 mph.

So now there must be a tire guy on here somewhere. What do you do with a Z tire when you pick up a nail? Repair or replace. I want to be safe, but economical at the same time.
chris
 

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Just change the tire. /phpBB/images/smiles/icon_frown.gif

It's the safest way to go,
Trust me, you don't want that tire blowing up on you when you're going at high speeds. /phpBB/images/smiles/icon_frown.gif
 

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Discussion Starter #10
Thanks VPRKLLR. Tires have 2 or 3 thousand left on them. Will keep it under 100MPH until then. But it seems absurb that one would have to replace $400 tires each time something minor like this happens.
 

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Marz,
As you know I live in your area and I want to stay away from a "bad" dealership. Could you give me a hint as to who it might be so I can avoid them?
 

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First, tires on the Z06 are "Y" rated, not "Z". Speed rating "Y" is good for 186 mph. "Z" is the old rating that is simply good for "over 150" but indeterminate (or not fully tested or certified) beyond that.

A proper tire repair is "internally" patching on the inside of the tire, which is
obviously more costly. Conversely, plugging is a "temporary" repair, does not require
dismounting and is therefore inexpensive, and
probably any gas station could do in 15 mins max.

Either way, only a fool would subject a tire repaired by either method to a Z06's maximum speed (~170 mph). For everyday (normal) use,
there shouldn't be any serious concern.

The nature of the puncture, size and its location is also of relevance in this discussion. In the final analysis, the safest thing to do, although certainly not the most cost effective, is to replace the tire and write off the flat to bad luck.
 

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I still wouldn't take any chances with the tires, a key element of the ZO6.

This goes back to the ZO6 fuel rail covers and their price.

You guys own a $50K sports car, and if the tire fails, you will be kicking your own ass because you didn't change that tire. /phpBB/images/smiles/icon_frown.gif /phpBB/images/smiles/icon_frown.gif

Now, that's my opinion so don't anybody take offense by it. /phpBB/images/smiles/icon_smile.gif /phpBB/images/smiles/icon_frown.gif /phpBB/images/smiles/icon_smile.gif
 

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Discussion Starter #14
50kf360,
Call me paranoid, but until my car is fixed, I would rather not disclose the name of dealer.Once they fix it, I'll let you know.
dsinned...As for driving my Z to it's maximum potential (170+mph), wouldn't do it with a undamaged tire, let alone a patched one!

_________________
M.R.
Quicksilver 2001 Z06
Halltech TRIC System w/ported throttle body.
B&M Ripper w/Momo Race Airleather knob.
Frame Savers & Rocker Rails
Rolled Z06 Exhaust Plate
Aluminum Gas & Dead Pedal
 

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Hi there,
Per Goodyear repair document, 45011355, the following applies to this post.
"If a puncture occurs in a F1-sportscar tire, up to 3 vulcanizing repairs may be performed on the tire carcass.
The repair procedure must be followed per Goodyear guidlines to affect the correct speed rating for the tire. A maximun of 3 repairs are allowed to maintain the tire integrity, and allowed classified speedrating. Tire repair plugs may NOT be used under any circumstances."
I can say that I have repaired these with not a problem yet. The biggest thing that must be noted is that street driving is NOT racing, and therefore should be noted. I have not had any problems as long as I follow Goodyear guidelines, and clean the inside of the tire of ALL repair sealant.
Best to all, c4c5
 

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As usual C4C5 Specialist helps us out!
Sure is nice having you here, thanks! /phpBB/images/smiles/icon_biggrin.gif /phpBB/images/smiles/icon_biggrin.gif

Zippy /phpBB/images/smiles/icon_smile.gif /phpBB/images/smiles/icon_smile.gif
 

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On 2001-06-27 22:50, N4C5S spewed forth this drivel:
Call me a fool....160 on a patched front...
Several times...

JC
That's not being a FOOL,

it's called having GUTS and BALLS. /phpBB/images/smiles/icon_eek.gif

I still wouldn't do it on a patched tire.

Be careful JC. /phpBB/images/smiles/icon_biggrin.gif
 

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MarZ06:

I know a guy that had to sell his Z and has two new spares to sell, one front and one rear. E-mail privaitly and I can put you in touch, if you are interested. He may have sold them by now, but you never know. These are the OEM tires brand new.
 

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Go figure. According to the Vette Doctor, the 19 year old working at my local discount tire knew more than many of us would ever give him credit for. I for one took it with a grain of salt. But I do know that with a patched tire on my Formula my little brother incorrectly inflated all the tires to 70 psi (it's good to check to see if the tire gauge is accurate on occasion) and was clocked (by a local officer of the law) doing 91 while slowing and the tires have held up fine. They have even been through an autocross.
chris
 
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