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I am NOT going to give the name of the company that did this service...because all I am trying to express is that you should NEVER assume anything...regardless on who it comes from...and you will shorty read why this is true.
These are FACTS and not my opinion on this matter and unless a person chooses not to acknowledge GM's service information...then I guess that person will want to debate this.
First off...read this out of the GM Corvette service manual.
it CLEARLY states that when a rotor is being turned down...it CANNOT be surfaced thinner that 1.230". So....turning it to 1.228" is not good or any thickness under the 1.230"
A customer of mine sent his two trailing arms out for rebuilding at this company because the costs were cheaper than if I did it. There was an extra charge for indexing the rotors to the spindles and I told him I DID NOT want the rotors riveted back on due to it is not required.
The company that he sent them to, who I know should do a good job due to being in business a very long time. When the trailing arms came in the trailing arms looked very good. And the rear wheel bearings were also done correctly and were in specs but I prefer to get the end play of the bearings much tighter than what they did. Once again...another area where people can disagree.
But here is where the problem begins. The rotors were machined BELOW the minimum of 1.230 when completed.
These two photos show what they measured at.
1.219"
1.218"
Not that this was bad enough...that these rotors are now about .003" to .004" of an inch from discarding them....because if you remember...in rotor information above...it clearly states that discard is at 1.215".
The sad thing about this is that the rotors that were sent with the trailing arms where at 1.247" and 1.245" respectively. If I still had them at the shop I could have saved them and not needed to cut them down as badly as they had. I assumed they knew what they were doing... a big error on my account for assuming that.
Also it is a crying shame that this company has not figured out how to use the shims that are available ...even if they rivet the rotor back on so they do not have to machine off so much metal....OR...realize that they are turning rotors down too far.
Thank goodness I did not have the rotors riveted back on because when I went in and installed brand new rotors and indexed them by using shim material as needed. I also noticed that the adjuster on one trailing arm was not installed correctly and it needed to be corrected. because its position is critical in order to follow GM's outline on how to tighten up the parking brake shoes for adjustment. IF these rotors were riveted back on..it would have been a waste of time and money.
Correct procedure to using the screwdriver on the adjuster.
Clearly stated in the fifth paragraph. Your hand raises up when tightening the park brake shoes. One trailing arm was backwards and I had to go down with the screwdriver. Something that should NOT have been overlooked if they were paying attention....or trying to do so much for so little money.
Lastly here is the written text that states the rotors do not need to be riveted back on. People can do as they wish in this area...but I prefer not to for making it easier on some service operations.
So...just because your trailing arms come in looking great may still make them not right.
DUB
Last edited by DUB; 01-07-2019 at 06:55 PM.
Reason: spelling/text
Very good critique DUB.....I hope a lot o' folks heed your warnings and apply them!
If I was the owner of the discs, I'd damn sure try to get my $$$ back....if he can't, then I would at least get w/ the BBB, along w/ warnings by word-of-mouth. SHAME!
Very good critique DUB.....I hope a lot o' folks heed your warnings and apply them!
If I was the owner of the discs, I'd damn sure try to get my $$$ back....if he can't, then I would at least get w/ the BBB, along w/ warnings by word-of-mouth. SHAME!
I had a rather HEATED argument with them. 'They' were saying the rotors were GOOD because they were above the DISCARD thickness...but I COULD NOT get the guy to wrap his head around the FACT that they were machined down too far.
THEN.....'they' wanted me to show them written text on using shims to correct the rotors ...where that is implied common sense and should not he to be spelled out.....BUT YET...they would not observe the written text as I stated on how much the rotors can be turned down before you MUST STOP machining them.
They did send me two used rotors but when I got them..they were so badly pitted I just went ahead and out two new ones on. TRUST ME..I will never make that mistake again.
Some guy might be getting ready to send his parts to them right now but not naming the place he really doesnt Get any warning,
afterall you called the shop and they told you the rotors are good to go,
They would likely tell anyone who called the same,
Knowing what i do about you i am surprised you protect the bad shop by not naming them,
The problem is by not naming the shop all get a bad rap. Perhaps someone should check with a moderator. But member businesses will likely be.protected
Nope, supporting vendors are not protected,
in the transaction section even a problem with a supporting vendor can and should be named,
I am all in favor of feedback but name names or no real help or point
I am NOT going to give the name of the company that did this service...becasue all I am trying to express is that you should NEVER assume anything...regardless on who it comes form...and you will shorty read why this is true.
These are FACTS and not my opinion on this matter and unless a person chooses not to acknowledge GM's service information...then I guess that person will want to debate this.
First off...read this out of the GM Corvette service manual.
it CLEARLY states that when a rotor is being turned down...it CAN NOT be surfaced thinner that 1.230". So,,,turning it to 1.228" is not good or any thickness under the 1.230"
I customer of mine sent his two trailing arms out for rebuilding at this company because the costs were cheaper than if I did it. There was an extra charge for indexing the rotors to the spindles and I told him I DID NOT want the rotors riveted back on due to it is not required.
The company that he sent them to, who I know should do a good job due to being in business a very long time. When the trailing arms came in the trailing arms looked very good. And the rear wheel bearings were also done correctly.\
But here is where the problem begins. The rotors were machined BELOW the minimum of 1.230 when completed.
These two photos show what they measured at.
1.219"
1.218"
Not that this was bad enough...that these rotors are now about .003" to .004" of an inch from discarding them....because if you remember...in rotor information above...it clearly states that discard is at 1.215".
The sad thing about this is that the rotors that were sent with the trailing arms where at 1.247" and 1.245" respectively. If I still had them at the shop I could have saved them and not needed to cut them down as badly as they had. I assumed they knew what they were doing... a big error on my account for assuming that.
Also it is a crying shame that this company has not figured out how to use the shims that are available ...even if they rivet the rotor back on so they do not have to machine off so much metal....OR...realize that they are turning rotors down too far.
Thank goodness I did not have the rotors riveted back on because when I went in and installed brand new rotors and indexed them by using shim material as needed. I also noticed that the adjuster on one trailing arm was not installed correctly and it needed to be corrected. because its position is critical in order to follow GM's outline on how to tighten up the parking brake shoes for adjustment. IF these rotors were riveted back on..it would have been a waste of time and money.
Correct procedure to using the screwdriver on the adjuster.
Clearly stated in the fifth paragraph. Your hand raises up when tightening the park brake shoes. One trailing arm was backwards and I had to go down with the screwdriver. Something that should NOT have been overlooked if they were paying attention....or trying to do so much for so little money.
Lastly here is the written text that states the rotors do not need to be riveted back on. People can do as they wish in this area...but I prefer not to for making it easier on some service operations.
So...just because your trailing arms come in looking great may still make them not right.
Unfortunately most people don't read the directions.
You cannot be mad a DUB for not listing his vendor, he has a Corvette shop for a living, chastising a vendor makes it harder for him to run his business and makes it harder to get parts for his customers.
Unfortunately most people don't read the directions.
You cannot be mad a DUB for not listing his vendor, he has a Corvette shop for a living, chastising a vendor makes it harder for him to run his business and makes it harder to get parts for his customers.
familiar with the phrase this thread is worthless until dub names names...BEWARE, beware of who?
Agreed name needs to be said to protect customers before they buy not after.Sucks to have to go to this extreme but, maybe its time to bring this to a lawyers attention before anyone gets hurt from the rotors being so thin.
Unfortunately most people don't read the directions.
You cannot be mad a DUB for not listing his vendor, he has a Corvette shop for a living, chastising a vendor makes it harder for him to run his business and makes it harder to get parts for his customers.
If you have to know there is always the private message system. Ask DUB there.
I agree minimum after refresh means that the rotors will most likely wear to throwaway thickness during the life of the new pads just put on. If it were me and they were below the minimum refresh thickness but above the throw away thickness I'd toss them and I'm a DYI Corvette owner on a budget. Brakes are the one system I don't go half-*** on EVER.
So I'll partially side with the vendor and venture a guess and say 8 times out of 10 a customer will complain if those rotors were discarded without being at the 'discard' thickness.
05-11-2017, 06:45 PM
***warning***buyer beware*** warning***
this thread is worthless until dub names names...BEWARE, beware of who?
