Cant tell which stud is yellow on left front

J

jayhawk

Registered
Is there any other way to find out which stud should be painted yellow. My right front is fine, my left front I cant see where it was painted yellow. Is there another way to find the right stud alignment ? I just had the wheels off the car yesterday to put new rotors and ceramic pads on it. Let me tell you , getting the wheels off was no small job. When I did get them off, it was amazing how much crap was in the wheel itself. seems as if these wheels actually slide over the hub. My octostars didnt seem to do that ( on the gen 1). And yes, I used the torque wrench :)

Also, I remember a while back people talking about on car balance of their wheels. What was the name of that machine , and there was a web site I thought that would tell you who had them.

Any other recommendations ? It would be at Goodyear as my father is a long time employee. Going from Eagle HP to Dunlop SP Sport 2A and I want the best balance possible.

Thanks in advance !
 
RE: Cant tell which stud is yellow on left front

Is there any other way to find out which stud should be painted yellow. My right front is fine, my left front I cant see where it was painted yellow. Is there another way to find the right stud alignment ?
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A lot of times you can look at the hub/rotor face where the wheel mates to and find a distinguishable mark or pattern. Simply match it to the wheel.

If you have the wheels balanced on the vehicle, it is a moot point.
 
RE: Cant tell which stud is yellow on left front

So would I see this mark actually ON the part of the hub that I can still see ( with the rotor on), or is it behind the rotor itself.

Is this actually suppose to counter balance rotors to the valve stem ? or is it something that is part of the spindle configuration on the Marks.

I just put new rotors and ceramix on the front and want to make sure when I go get a hunter balance before my long trip coming up that I remove as much vibrations as possible.

Thanks in advance...
 
RE: Cant tell which stud is yellow on left front

Is this actually suppose to counter balance rotors to the valve stem ? or is it something that is part of the spindle configuration on the Marks.
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If your wheel tire assembly is perfectly balanced, where or how you mount your wheel can not affect the overall balance of the rotating assembly after it's mounted.

In order to subscribe to the theory that the yellow lug somehow has anything to do with the overall balance after the wheel is mounted onto the spindle, you would have to believe that the assembly would have to be intentionally made to be out of balance to make up for whatever purpose it's believed why there is a yellow lugnut.

IMHO

http://members.tccoa.com/lastmrk/Images/lastmrk2.jpg
 
RE: Cant tell which stud is yellow on left front


In order to subscribe to the theory that the yellow lug somehow has anything to do with the overall balance after the wheel is mounted onto the spindle, you would have to believe that the assembly would have to be intentionally made to be out of balance to make up for whatever purpose it's believed why there is a yellow lugnut.
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When a wheel(consisting of a tire and rim) is balanced ON the vehicle, the hub/rotor assembly do become part of the balanced assembly. If the wheel is then removed and replaced without indexing back to the original timing, the balance of the assembly will be off. The only way it does not matter is when the rotor/hub assembly are in PERFECT balance, more a rarity than you can imagine. This imbalance is not intentional, it is just a byproduct of today's attitude in most manufacturing: "That's good enough...".

For the vast majority of drivers and their cars, today's tires and rims statically balanced will be sastifactory. More discriminating drivers/cars with high performance tires and/or lightweight rims will require a dynamic balance to be sastified. A small percentage of elite cars or drivers, and problematic tire/wheel/hub/rotor assemblies will require much more precision in balancing the rotating assembly.
 
RE: Cant tell which stud is yellow on left front

Well I would love to find an on car balancing facility, but I havent had any luck. I have found a Hunter 9700 Series ( off car, with up to 1400 lbs load during spin).

Does anyone know a way to find someone who has on car balancing. My father is saying he use to do it many years ago..

Any ideas on that would be great. Also , the yellow stud is part of the runout determination from the factory. If you dont have the original rotors, to find that 'spot' you will have to have new rotors tested for runout. ( Ran into a section of the CD version of the manual that talked about the yellow marked stud).

So, any locators out there for on car balance ? or am I asking for a T-rex ?
 
RE: Cant tell which stud is yellow on left front

'Just glancing at the tech docs for '98, it does say to mark the front rotors when removing so they go back in the same position on the hubs - it doesn't say why. I imagine it's for minimum runout matching from the factory. I did an *extensive* search through the docs, and never could I find the yellow lug mentioned, at least on the DVD version.

Whenever *replacing* them with new rotors, though, it says nothing about lining up a yellow stud with anything. And nothing in the owners manuals says anything about indexing wheels to a yellow lug.

I personally believe it's just used during assembly to get the best runout match with new hub/rotors. After that, I've never seen anything official about the wheel valve, etc., matching the lug, only the aforementioned rotor/hub match, and then, only with the original parts. It does mention how to do the runout tests if you want to get best match for new rotors, but I've done a substantial number of rotor replacements in various cars over the years with no matching, and have never seen a problem caused by the minute amount of runout dealing with rotors.

A Hunter GSP9700 is the only way I'll ever have my tires balanced anymore. If that doesn't solve a wheel vibration problem, I seriously doubt any small amout of rotor runout will have an effect, and would suspect the problem would more likely be bent rims, out of round tires, or separated belts.

Also, be sure to let the tires get good and warm at highway speeds to see how well they're balanced. If they get warm during the day, then you take it out on the highway first thing in the morning when they're still cold after sitting overnight, you'll undoubtedly feel the "flat" spots until they warmed up good again - I go through this every morning when I first get on the highway, (30 lbs pressure). If I didn't know better, I'd suspect them of being out of balance, but after about a minute on the highway, they're back to glassy smooth...

John
http://mark8.org/users/johnaec/Mark_VIII_s.jpg
'97 Mark VIII LSC
'96 T-Bird 4.6L
 
RE: Cant tell which stud is yellow on left front

I couldnt believe I found anything referencing it either , till I stumbled across it today. So it is definately for the runout of rotors at the factory.

Well I am just trying to get the best balance. Ever since I swapped the Eagle HP's from the 94 to the 98 , I have had a vibration.

Might be getting to rubber so I want to take care of everything and have a really nice 2000 mile ride in a few weeks on vacation. New tires, mod chip and MAF, hope the family goes to sleep a few hours in.

Looking forward to I77 South through the hills of West Virgina on the way to Florida so I can have a little fun with the new 'life" breathed in the the Mark.
 
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