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Username Post: The Final Word on 1969 - 1970 Impala Rotors        (Topic#334460)
myndjestyr 
Newbie
Posts: 10

Reg: 04-27-14
07-07-20 09:29 PM - Post#2798189    
    In response to bry593

Hi,
Thank you for posting this info, it's really helpful!

When you removed the hubs from your old rotors did you use the same size wheel bolts or did you need to use longer or shorter ones when attaching them to the Centric rotors? What size are they?

I assume this is what holds the hub to the rotor?

Thanks



 


myndjestyr 
Newbie
Posts: 10

Reg: 04-27-14
07-08-20 03:53 PM - Post#2798236    
    In response to mjc1

Someone posted that the Dorman part 610-111 fit but they look nothing like your original ones.

Are the originals 1 3/4" length or 1 1/2"?



 
jktucker92 
Silver Supporting Member
Posts: 398
jktucker92
Loc: West Richland, WA
Reg: 02-05-17
07-09-20 07:02 AM - Post#2798257    
    In response to myndjestyr

I used the same size lug studs as original. I was able to find a set of Dorman 610-111 on Ebay, and they looked identical to the original ones I had. I did buy my set from a wrecking yard, so I can't be sure they are original, but they fit well. They are 1 3/4" long, and here's a photo of one that I removed.

Attachment: IMG_20200709_065805.jpg (4.26 MB) 8 View(s)


Original (I think) Stud




 
myndjestyr 
Newbie
Posts: 10

Reg: 04-27-14
07-09-20 01:18 PM - Post#2798285    
    In response to jktucker92

Thanks for responding.
A few years ago I found studs made by a company named Paulin. Apparently their info said these were for a 1970 Impala front disc brake assembly.
They are 7/16-20 x 1 1/2" long. I also recently went to another parts store and asked for them and got ones that looked identical except the "splines" were a bit longer but everything else was the same.

They look very different than your's but do you think they would work? And is 1 1/2" too short regardless?

Here's the link to the Paulin studs I have:

Paulin 1970 Impala studs:

But these look more like the ones in your pic and they are 1 3/4" with a similar style:

1 3/4" Paulin Wheel studs:

Thanks



Edited by myndjestyr on 07-09-20 04:23 PM. Reason for edit: No reason given.

 
59fins 
Member #212 "20th Year" Gold Supporting Member
Posts: 2377
59fins
Age: 60
Loc: Surprise Az USA
Reg: 04-07-00
07-09-20 09:59 PM - Post#2798322    
    In response to jktucker92

  • jktucker92 Said:
I used the same size lug studs as original. I was able to find a set of Dorman 610-111 on Ebay, and they looked identical to the original ones I had. I did buy my set from a wrecking yard, so I can't be sure they are original, but they fit well. They are 1 3/4" long, and here's a photo of one that I removed.



Mine look like yours, I was short a few and found them on eBay as well


Bill H.
67 SS




 
jktucker92 
Silver Supporting Member
Posts: 398
jktucker92
Loc: West Richland, WA
Reg: 02-05-17
07-10-20 07:54 AM - Post#2798346    
    In response to 59fins

Those studs you have won't work at all. The unique thing about the '67-'70 studs is that the disc is on the inside of the wheel hub. For that reason, there is a shoulder between the head of the stud and the knurled part. The knurl is what grabs the hub, and the shoulder holds the disc in place. That stud you have must be for drum brakes. The 1 3/4" stud you show looks very close, but one measurement doesn't appear to be correct. The knurl is listed at 0.575". The original one that I have uses a 0.465" knurl, just like the drum version. In the photo, it also appears to be fatter on the shank than the correct one. That said, a machinist could turn one down on a lathe, but I don't think it will work otherwise.



 
59fins 
Member #212 "20th Year" Gold Supporting Member
Posts: 2377
59fins
Age: 60
Loc: Surprise Az USA
Reg: 04-07-00
07-11-20 01:07 PM - Post#2798444    
    In response to mjc1

  • mjc1 Said:
Here's a shot of some used ones I've kept. At least it illustrates how they might look. And yes, they seem obsolete now. Perhaps another car or truck used the same setup? I can measure them if needed.







My mistake, I have the ones Mark has in this pic, their listed part number was the same as the one in Tuckers post per the examples on eBay, but clearly could see the difference, they are on the car and work.
I originally had 69 setup on my car, and found the 70 setup still on a car here in Arizona, the studs were different and a few were missing, I’d have to dig them out to see how they actually were different.
I actually bought the 70 setup for gravel guards for the rotor as one of mine had corrosion in it, the whole 70 setup was in better condition, so I used them. Still have the 70 booster and attachments. In 08 when I put the 69 setup on, I believe they came from back east, it would make sense that the right side bottom would have corrosion being the curb lane.




Bill H.
67 SS




 
myndjestyr 
Newbie
Posts: 10

Reg: 04-27-14
07-12-20 10:13 AM - Post#2798526    
    In response to jktucker92

Ok. As far as the studs, I may have to just try and re-use my existing ones if they can be removed and re-installed without issues.

As far as the hub, I see that Wilwood makes a couple for the 70 Impala but I'm not an expert, and not sure if this particular hub would work with the Centric rotor. Or if you have to use WIlwood rotors?

Wilwood Impala Hub






 
myndjestyr 
Newbie
Posts: 10

Reg: 04-27-14
08-21-20 07:02 PM - Post#2801699    
    In response to bry593

Thanks again for this post. I purchased the Centric rotors and they fit perfectly with my original 1 piston calipers!
I managed to find 5 original wheel studs and lucky I did because 5 of the ones that were on there were damaged trying to remove them from the hub!Rebuilt the calipers, new hardware everywhere, new hoses, ceramic pads...this thing feels better than some of my newer vehicles!

Now a bunch of other stuff I need to fix and have lots of questions about!



 


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