brake rotor machining, 1971 model year split

[m2008s]

so my fronts are shot... but my rotors can be turned (no big pits or divits etc). i just want to know the minimum machining level/replacement thickness so i can see if i could get them turned or not

anyone have any idea? also i realize 71 had a split and im trying to figure out which month mine was built... and i have no tag to say so. SN 3612263490

thanks a ton i really appreciate it...

mike
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[KTPhil]

When the rotors changed the calipers did, too. Do you have two bleeder valves on each side? What is the bolt spacing on the caliper? We can determine "early '71" or "late '71" with those two pieces of info.

I am not sure if the min rotor thickness changed at that time. The calipers and pads got larger, and the rotors changed. But the thickness may or may not have, so it may not change your answer about machining them or not. You can call the machine shop and ask them if it changed.

Also, check the rotor's outer edge; I thought the min dimension was cast into it.

[Russ Wolfe]

Rotor change happened in 72, not 71.
71 takes the same rotor as 1966 thru 1971.
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Gary: OK. Ima poop.

[Bobnotch]

According to Bentley, the thickness didn't change with the rotor size change. New thickness should be 9.45 - 9.50mm (.372-.374 inches), and the wear limit (for replacement) is 8mm (.315 inches). Now the minimum thickness after turning can only be 8.50mm (.335 inches) thick. I hope this helps.
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[KTPhil]

[Russ Wolfe]

August 71 is when they made the change. Which would be 72 model year.
They also changed the T-3 caliper again in the June 72.

http://classicvw.org/gallery2/d/11386-1/Brake+Manual+154.jpg

http://classicvw.org/gallery2/d/11389-1/Brake+Manual+155.jpg
_________________
Society is like stew. If you don't keep it stirred up, you end up with a lot of scum on the top!--Edward Abbey

Gary: OK. Ima poop.

[m2008s]

thanks, i really appreciate the help. foreign parts store told me different, but i believe you all over them

mike
_________________
I have VD (volkswagen disease).

Check out my Myspace (click WWW) and add me, send me a msg though or ill decline .

FOR SALE 71 SQUARE http://www.thesamba.com/vw/classifieds/detail.php?id=690111

[atrujillo1991]

[KTPhil]

So you have different spindles and discs on the sides?!

There are some subtleties in the T3 calipers. For example, the same looking part, minus the compensating pin device, is used in the T4, but they are NOT interchangeable. Also, relevant to you, there are reports of a smaller calipers that still have two bleeders. These may have been replacement units made with two so they can be used right or left side. This might explain yours without the extreme of different year axles on the same beam!

[Gary]

[VWGirl]