57Pontiac
Member
Posts: 109
Loc: Ste-Sophie, QC, Canada
Reg: 07-09-04
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05-11-12 11:08 AM - Post#2224851
Hi folks,
Can you confirm if the front and rear brake drums are the same on a 57?
I have at least 20 drums, how do you tell if they are still good or not?
Thanks!
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 WagonMan
"3rd Year" Silver Supporting Member
Posts: 1266
Age: 65
Loc: SW Kansas
Reg: 10-26-04
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05-11-12 11:14 AM - Post#2224854
In response to 57Pontiac
For a Chevy, yes they are the same after removed from the front hubs.
Visual inspection for heat/stress cracks and measuring of the diameter to make sure they are still within specs.
Charles
57 210 4dr. Wagon(bought '82)
-350/700r4 Mild Custom
56 BA 4dr. ht.(bought '98)
-265/TH350 Mostly Stock
29 Ford Sedan(bought '75)
-4.3L/TH350(in progress)
53 Chevy 3100 (bought '96)
-250 I6/TH350 |
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57Pontiac
Member
Posts: 109
Loc: Ste-Sophie, QC, Canada
Reg: 07-09-04
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05-11-12 11:18 AM - Post#2224856
In response to WagonMan
Thanks Charles,
Do you have the specs by any chance? 
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WagonMan
"3rd Year" Silver Supporting Member
Posts: 1266
Age: 65
Loc: SW Kansas
Reg: 10-26-04
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05-11-12 11:24 AM - Post#2224857
In response to 57Pontiac
Shop Manual specifies .060" max oversize, but the max should be cast into the outer edge of the face of the drum.(but this may be a later DOT requirement)
Charles
57 210 4dr. Wagon(bought '82)
-350/700r4 Mild Custom
56 BA 4dr. ht.(bought '98)
-265/TH350 Mostly Stock
29 Ford Sedan(bought '75)
-4.3L/TH350(in progress)
53 Chevy 3100 (bought '96)
-250 I6/TH350 |
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57Pontiac
Member
Posts: 109
Loc: Ste-Sophie, QC, Canada
Reg: 07-09-04
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05-11-12 11:57 AM - Post#2224863
In response to WagonMan
Sorry for my ignorance, but I don't know what .060" max oversize means.
My guess is that I should measure the thickness of the drum "wall", but I have no clue what the thickness should be.
Thanks again
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 acardon
"9th Year" Silver Supporting Member
Posts: 9458
Loc: DFW TEXAS
Reg: 03-25-05
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05-11-12 01:53 PM - Post#2224893
In response to 57Pontiac
You have to measure the inside diameter of the drum. Take them to a auto supply that turns drums and they can measure them. They have a gauge something like this.
Don
66 Corvair (driving)
57 2dr HT (restoring)
56 2dr HT (waiting to be restored)
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Bruces 57
Frequent Contributor
Posts: 1663
Reg: 01-03-07
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05-11-12 03:50 PM - Post#2224929
In response to acardon
Hello;
Better yet, just buy new drums, they arn't that expensive!
Nothing is too expensive where safety is concearned!
You could sell off your old drum supply to a scrap metal place and get enough $$ for new drums.
Bruce
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 62chevy427
"7th Year" Silver Supporting Member
Posts: 1499
Loc: laurens sc
Reg: 04-13-06
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05-12-12 07:45 AM - Post#2225105
In response to WagonMan
i just looked at some 57 drums and they do not have max size cast into them.
56 bel air ((since 2002)
62 impala ss (since 1965)
65 el camino (since 1969)
66 nova (since 1987)
67 malibu convertible (since 1981)
72 el camino ss454 (since 1985)
83 gmc 4wd (since 1991)
95 impala (new)
11 malibu (new) |
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WagonMan
"3rd Year" Silver Supporting Member
Posts: 1266
Age: 65
Loc: SW Kansas
Reg: 10-26-04
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05-12-12 09:56 AM - Post#2225155
In response to 62chevy427
i just looked at some 57 drums and they do not have max size cast into them.
That requirement must have started in later years.
Mine are all covered up on the car so didn't look at them, just remembered that some I have worked on were marked.
Charles
57 210 4dr. Wagon(bought '82)
-350/700r4 Mild Custom
56 BA 4dr. ht.(bought '98)
-265/TH350 Mostly Stock
29 Ford Sedan(bought '75)
-4.3L/TH350(in progress)
53 Chevy 3100 (bought '96)
-250 I6/TH350 |
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