SMOOTHCHROME Posted March 19, 2022 Share Posted March 19, 2022 Does anybody on the forum know if the front rotors on a 70 Monte big block car have the same or bigger rotors than the small block Mont Carlo Quote Link to comment Share on other sites More sharing options...
Canuck Posted March 19, 2022 Share Posted March 19, 2022 5 minutes ago, SMOOTHCHROME said: Does anybody on the forum know if the front rotors on a 70 Monte big block car have the same or bigger rotors than the small block Mont Carlo Same rotors for all first gen Montes regardless of engine. 1 Quote Link to comment Share on other sites More sharing options...
MC1of80 Posted March 19, 2022 Share Posted March 19, 2022 X2 to what Aaron already said. Quote Link to comment Share on other sites More sharing options...
jft69z Posted March 19, 2022 Share Posted March 19, 2022 11 inch diameter. Quote Link to comment Share on other sites More sharing options...
SMOOTHCHROME Posted March 19, 2022 Author Share Posted March 19, 2022 MC1of80 and jft69z Thank you for the replies. 2 Quote Link to comment Share on other sites More sharing options...
Rob Peters Posted March 19, 2022 Share Posted March 19, 2022 It is amazing but my Monte still has its original factory front rotors. I am not sure about the 71 and 72 rotors but the 70 rotors had a recessed grove all the way around the rotor about half way across the face of the rotor. This is how you can tell they are factory style rotors. It would surprise me if what you buy as replacement rotors now would have his grove in them. rob Quote Link to comment Share on other sites More sharing options...
jft69z Posted March 19, 2022 Share Posted March 19, 2022 26 minutes ago, Rob Peters said: This is how you can tell they are factory style rotors. It would surprise me if what you buy as replacement rotors now would have his grove in them. rob The current rotors out there don't seem to have that groove. They're the same rotors for a 69 Camaro though & the ones I took off my car recently had the groove in them. I did replace them when I initially built the car in the late 80's, I think they were Bendix at the time. Quote Link to comment Share on other sites More sharing options...
cny first gen 71 Posted March 19, 2022 Share Posted March 19, 2022 As best as I can remember from back in the day all the factory rotors had that groove, tha A body's anyhow and I think the full sized cars too. 1 Quote Link to comment Share on other sites More sharing options...
Dtret Posted March 20, 2022 Share Posted March 20, 2022 My 71 still has the original also. When I had them turned I told them to leave the groove. They said the groove was not supposed to be there something caused it. I said your right and the cause was gm. lol. Idiots. 3 Quote Link to comment Share on other sites More sharing options...
cny first gen 71 Posted March 20, 2022 Share Posted March 20, 2022 If you know anyone that works in a brake shop or has a brake lathe they could cut them in there if you really want. Quote Link to comment Share on other sites More sharing options...
Rob Peters Posted March 20, 2022 Share Posted March 20, 2022 2 hours ago, Dtret said: My 71 still has the original also. When I had them turned I told them to leave the groove. They said the groove was not supposed to be there something caused it. I said your right and the cause was gm. lol. Idiots. 1 2 Quote Link to comment Share on other sites More sharing options...
Glen Posted March 20, 2022 Share Posted March 20, 2022 Aawwweeee, S%#T…. Rob let the dancin’ bananas out of their cage. 1 Quote Link to comment Share on other sites More sharing options...
Michael Boyte Posted March 20, 2022 Share Posted March 20, 2022 DANG !!!! NOW ROB HAS SOME REAL BANANAS !!! Quote Link to comment Share on other sites More sharing options...
Dtret Posted March 20, 2022 Share Posted March 20, 2022 I don’t know what I did to deserve this kind of abuse. Never mind, yes I do. Carry on. 1 3 Quote Link to comment Share on other sites More sharing options...
Leghome Posted March 20, 2022 Share Posted March 20, 2022 3 hours ago, Dtret said: I don’t know what I did to deserve this kind of abuse. Never mind, yes I do. Carry on. 😁😁😁🤑😁😁It is your magnetic personality Dennis 🤑 1 Quote Link to comment Share on other sites More sharing options...
Dtret Posted March 20, 2022 Share Posted March 20, 2022 3 minutes ago, Leghome said: 😁😁😁🤑😁😁It is your magnetic personality Dennis 🤑 Ugh Quote Link to comment Share on other sites More sharing options...
Scott S. Posted March 20, 2022 Share Posted March 20, 2022 Has anyone ever had the rotors with the finned hubs ? Both my front rotors and read drums have them, and I was just wondering if this is just manufacturer specific, or original parts. Quote Link to comment Share on other sites More sharing options...
cny first gen 71 Posted March 20, 2022 Share Posted March 20, 2022 Yes on the finned drums but not sure what you mean by finned rotors. Can you show us what your talking about? They all have he Finns in the center. Quote Link to comment Share on other sites More sharing options...
Blake350 Posted March 20, 2022 Share Posted March 20, 2022 Wonder what that groove was for? Doesn't look to be for cooling...maybe some sort of air gap between pad and rotor? or an indexing aide during machining? or only purpose is for mechanical minds to wonder about it 50 years later? yes that's what I'm going with (for now) Quote Link to comment Share on other sites More sharing options...
Dtret Posted March 20, 2022 Share Posted March 20, 2022 Quite possible it was a factory machine to line. If you got there throw them away and buy new. Quote Link to comment Share on other sites More sharing options...
Rob Peters Posted March 21, 2022 Share Posted March 21, 2022 I am wondering if it was used by dealers to guage how much wear is on a rotor. It may have been a pass/no pass indicator for knowing when they were worn out. rob Quote Link to comment Share on other sites More sharing options...
Blake350 Posted March 21, 2022 Share Posted March 21, 2022 11 hours ago, Rob Peters said: I am wondering if it was used by dealers to guage how much wear is on a rotor. It may have been a pass/no pass indicator for knowing when they were worn out. rob thats possible.. a quick visual "min thickness" reference... we used to use a primitive guage setup to judge whether we could cut them back in the day Quote Link to comment Share on other sites More sharing options...
Scott S. Posted March 21, 2022 Share Posted March 21, 2022 22 hours ago, cny first gen 71 said: Yes on the finned drums but not sure what you mean by finned rotors. Can you show us what your talking about? They all have he Finns in the center. The front rotors had short fins that were around the center hub down to the disc surface..... I threw them in the metal scrap when I re did my brakes, thought that they were just that old. Quote Link to comment Share on other sites More sharing options...
cny first gen 71 Posted March 21, 2022 Share Posted March 21, 2022 2 hours ago, Scott S. said: The front rotors had short fins that were around the center hub down to the disc surface..... I threw them in the metal scrap when I re did my brakes, thought that they were just that old. Can't say I've ever seen that before that I can think of. I upgraded to drilled and slotted rotors on mine but no Finns. Quote Link to comment Share on other sites More sharing options...
Leghome Posted March 21, 2022 Share Posted March 21, 2022 The fins vthey are talking about me thnks is in the space between the inner and outer face of the rotors at least that is my thooughts were have been wrong alreaddy 6 times today 😁😀 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.