71 double cab new rear brake drum face too thick

[koozy]

What am I missing here. Has anyone had this issue? 71 double cab new rear brake drum face too thick so when I put it on, the studs are now too short.

Called and asked the salesman and he said he's never heard of this problem. Am I using the wrong drum?

Thanks in advance,

Mike

[richparker]

After market parts aren’t always what they should be? Did you buy German drums?

Although it’s certainly thicker, I can’t imagine 3.26mm being an issue with the wheel studs.
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Adventure thread
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[koozy]

[aeromech]

Isn’t that a Vanagon wheel?
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[koozy]

I don't know. Is it? Maybe that's the problem

[koozy]

How do I tell the difference? Please forgive my ignorance

[aeromech]

What I’m actually referring to is the center of the wheel. The flowered one like you have might not seat around the round hub
_________________
Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
Licensed Pilot (Single engine Land)
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VW Type 2 1971 (3 ea.) 1978, 1969
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Capable of leaping tall buildings in a single bound

[aeromech]

https://www.mamotorworks.com/vw/knowledgelibrary/exterior/volkswagen-rims-what-you-should-know

The last pic shows a round center
_________________
Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
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Boeing 727,737-200-300-400,757,767
Airbus A319,320,321
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VW Type 2 1971 (3 ea.) 1978, 1969
VW Jetta
VW Passat
Capable of leaping tall buildings in a single bound

[koozy]

Oh, I see. I just looked at a listing on CIP1 and they list the 71 bus wheel as the same as the Vanagon.

https://www2.cip1.com/VWC-211-601-027-H/?gad_sourc...tFEALw_wcB

[koozy]

But I see what you are saying. I'll look at that when I get to the shop tomorrow. That's a good point. Thanks!!!

[aeromech]

Yeah I saw they listed it like that but if you examine your pic closely, you’ll see that where the flower petals are the paint it chipped. That tells me that it’s interfering with the mate of the hub and wheel.
_________________
Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
Licensed Pilot (Single engine Land)
Boeing 727,737-200-300-400,757,767
Airbus A319,320,321
DC9/MD80
BAe146
Fokker F28/F100
VW type 1 1962,63,65,69,72
VW Type 2 1971 (3 ea.) 1978, 1969
VW Jetta
VW Passat
Capable of leaping tall buildings in a single bound

[koozy]

Before replacing the drum

[aeromech]

I’m probably wrong. Anyway, I’ve never seen this particular problem before but I have seen some pretty poorly copied Chinese bus drums before. In one case they wouldn’t even slide over the axle splines (split bus) and the American vendor knew about the issue but didn’t want to get stuck eating the loss so they sold them anyway hoping that many wouldn’t be returned for credit.
_________________
Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
Licensed Pilot (Single engine Land)
Boeing 727,737-200-300-400,757,767
Airbus A319,320,321
DC9/MD80
BAe146
Fokker F28/F100
VW type 1 1962,63,65,69,72
VW Type 2 1971 (3 ea.) 1978, 1969
VW Jetta
VW Passat
Capable of leaping tall buildings in a single bound

[koozy]

Gives me something to check, so thanks for the info. It may just be the drums are being made a bit too thick and folks just run them this way. Worst case I'll just replace the studs with good quality longer ones.

[aeromech]

Maybe the extra thickness makes up for the poor quality steel?
_________________
Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
Licensed Pilot (Single engine Land)
Boeing 727,737-200-300-400,757,767
Airbus A319,320,321
DC9/MD80
BAe146
Fokker F28/F100
VW type 1 1962,63,65,69,72
VW Type 2 1971 (3 ea.) 1978, 1969
VW Jetta
VW Passat
Capable of leaping tall buildings in a single bound

[koozy]

The thought crossed my mind.

I was hoping someone was gonna chime in and say something like "The 71 came in two configurations. The super early German delivered one had the bla bla bla that came with the thinner drum and you have to order part number XXX1234 or they send you the late model one that is thicker"

Dang

[richparker]

The flower wheel is called “fumagalli,” after the Italian manufacturer of the rims and is a 72-79 rim.
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’71 Westy build
Adventure thread
’65 Deluxe Build
’71 Double Cab

[germansupplyscott]

[koozy]

Thanks for the great info and photos. I think the part is wrong and will order another set with the correct part number

[kreemoweet]

I"ve got a set of brand-new brake drums for my '71 bus, do not remember where or when purchased but have "BDM" markings. The web measurement varies from 2.75 to 3.25 mm, both sides have a layer of self-applied paint.

It would be really helpful if folks reporting on problematic parts would disclose the seller and brand info, if known.
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