OE number for 1971 2800CS front rotors.

[DTZ]

Any one know of the P/N?

 

[Thomas76]

Not of hand, but walloth nesch carries them.

Be sure to get the right ones for your car.... Vented or solid rotors

 

[tdgray]

Nope… they are NLA

I have yet to find a source for them.

Apparently, the work around is to upgrade to 3.0’s. Which involves some relocation of the caliper… or so I’ve surmised from the kit they sell.

 

[DTZ]

Thanks!

 

[Dick Steinkamp]

Unless your car has been modified, they are solid (non vented) 34111152089. Same as all years E3 and all years E12.

Rock Auto has them $22-25. https://www.rockauto.com/en/catalog/bmw,1971,2800cs,2.8l+l6,1011058,brake+&+wheel+hub,rotor,1896

 

[lip277]

Nope… they are NLA

I have yet to find a source for them.

Apparently, the work around is to upgrade to 3.0’s. Which involves some relocation of the caliper… or so I’ve surmised from the kit they sell.

I may have a set (that I got as spare) for my old set up before I upgraded to vented rotors.
I can look next week in my shop and try to find them.... I don't recall seeing them from when I moved (and at that, the parts may have been from my old 2002 - will advise).

 

[Dick Steinkamp]

@DTZ. To find part numbers, go here https://www.realoem.com/ click on CLASSIC, then your model, then year and month of manufacture

 

[DTZ]

Found them at Rock Auto! thanks Dick!

 

[bmw2800cs]

Found them at Rock Auto! thanks Dick!

I bought disks from Rock auto about 4 years ago, they were the wrong disks. They may have fixed this. I understand some of us get disk upgrades from Walloth Nesh. I don't have the details, maybe someone in this forum can help.

 

[Dick Steinkamp]

I bought disks from Rock auto about 4 years ago, they were the wrong disks. They may have fixed this.

The rock auto discs have detailed specs under the two PNs they carry. Compare these specs with your current discs before you order.

 

[Ohmess]

I've had good luck with Rock Auto. The detail to determine if you are getting the correct part is usually there if you click on the INFO box next to the part you think may work.

 

[tdgray]

I already went down that road… those are the wrong discs… they will insist they are fine… nope. Did this less than two months ago

raybestos … wont fit. Tried two different times. All of them got sent back.

 

[tdgray]

Oh and I had to eat the shipping too.

 

[Dick Steinkamp]

I already went down that road… those are the wrong discs… they will insist they are fine… nope. Did this less than two months ago

raybestos … wont fit. Tried two different times. All of them got sent back.

How did the dimensions Rock Auto quoted differ from what you received and/or the ones on your car.

 

[lip277]

I may have a set (that I got as spare) for my old set up before I upgraded to vented rotors.
I can look next week in my shop and try to find them.... I don't recall seeing them from when I moved (and at that, the parts may have been from my old 2002 - will advise).

Update - I won't be able to look till Weds (at the earliest) - stay tuned....

 

[Ives]

I have a spare OEM set from my 1974 3.0 CS sitting on the shelf. They are solids. I replaced with drilled and slotted rotors. Glad to give them to you if you pick them up in Healdsburg.
Regards, Jon

 

[sfdon]

The 2800 uses solid rotors.

The 1974 Cs rotors are vented and will not fit in your calipers.

Dicks comment from above is partially correct- the e12 528i sold in USA uses vented rotors.

You have options- buy correct rotors…

Set 2x BMW E12 E3 front brake discs NEW OE QUALITY NorrBit | eBay

Entdecken Sie Set 2x BMW E12 E3 front brake discs NEW OE QUALITY NorrBit in der großen Auswahl bei eBay. Kostenlose Lieferung für viele Artikel!

www.ebay.de

BMW E12-E3-E9 brake disks(2) front 272x12 !NEW! NLA GENUINE 34111152089 | eBay

BMW E12-E3-E9 brake disks(2) front 272x12. Part No.34111152089. CLASSICBMWPARTS your source for Old School BMW!

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Or upgrade to vented calipers and vented rotors….

Conversion kit to front ventilated discs for 2800 CS and 2,5 CS for all year of production, the kit includes new brake calipers (no exchange), brake pads, ventilated brake discs and mounting material with nuts and bolts you need 1 for 1 car

Conversion kit to front ventilated discs for 2800 CS and 2,5 CS for all year of production, the kit includes new brake calipers (no exchange), brake pads, ventilated brake discs and mounting material with nuts and bolts you need 1 for 1 car

www.wallothnesch.com

 

[sfdon]

I would be cautious regards raybestos. Long history of not fitting there.

Search results for query: raybestos

e9coupe.com

 

[tdgray]

How did the dimensions Rock Auto quoted differ from what you received and/or the ones on your car.

The “hat” as my dad always called it is the wrong dimension. Both in diameter and depth. Also, one set I received had multiple holes for mounting which all were wrong and did not line up.

As per usual… Don is on top of it.

Personally when I do the restoration on mine I am going to make the switch… might as well future proof with something that is more widely available.

 

[Ohmess]

Oh and I had to eat the shipping too.

Yeah, that is a downside with Rock Auto.