Vane direction on rotors??????????????????
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Team Owner
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Vane direction on rotors??????????????????
Is the vane direction on the c4 the same as the c5? The C5's they paddle backward if you know what I mean. Now who ever did my brakes last reversed them so they are scooping air when rotating forward. Hope someone understands what I mean. I guess they would be the same as C5 are they marked RF right front as the c5's are I didn't see any with them on the car thanks.
Burning Brakes
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Re: Vane direction on rotors?????????????????? (John Shiels)
On the C4, air should be drawn in from the center hub and fan itself outwards. This also helps the front bearing assembly with heat dissipation. Sounds like the C4 and C5 are the same.
Le Mans Master
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Re: Vane direction on rotors?????????????????? (John Shiels)
John, I've been trying to remember this since a post the other day, and would have to pull my wheels again to see - which I will do tomorrow if you don't get an answer.
If I had to take a SWAG: I would say the the air flow is from the center inside outwards through the vanes, as posted above. I know this part is correct. So, given this it would make sense for the vanes to be pointed back looking from the top so as to evacuate into the slight vacuum behind the rotors.
I got into the same thing last time I replaced the rotors, finally went by part number. I don't think they are marked RF, LF - or even R, L.
If I had to take a SWAG: I would say the the air flow is from the center inside outwards through the vanes, as posted above. I know this part is correct. So, given this it would make sense for the vanes to be pointed back looking from the top so as to evacuate into the slight vacuum behind the rotors.
I got into the same thing last time I replaced the rotors, finally went by part number. I don't think they are marked RF, LF - or even R, L.
Team Owner
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St. Jude Donor '11
Re: Vane direction on rotors?????????????????? (John Shiels)
Is the vane direction on the c4 the same as the c5? The C5's they paddle backward if you know what I mean. Now who ever did my brakes last reversed them so they are scooping air when rotating forward. Hope someone understands what I mean. I guess they would be the same as C5 are they marked RF right front as the c5's are I didn't see any with them on the car thanks.
[Modified by Yello95, 2:40 AM 5/26/2002]
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Team Owner
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Re: Vane direction on rotors?????????????????? (Yello95)
Thanks guys for your help. I didn't think it was reverse engineering on the C5 I'll have to change them.
Melting Slicks
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From: Lockport NY
Re: Vane direction on rotors?????????????????? (John Shiels)
... :eek: ...
OK, you got me running to my manual...I replaced my front rotors earlier this year...
But to calm down other early C4 owners...The 84-87's don't use directional rotors...
...At least according to the parts manual...
...(But I've been wrong before...And will be again)... :D
Edit: The manual is correct. OEM 84-87 have "straight" vanes, not angled. (Whew!)... :D
[Modified by Rich B., 8:55 AM 5/26/2002]
OK, you got me running to my manual...I replaced my front rotors earlier this year...
But to calm down other early C4 owners...The 84-87's don't use directional rotors...
...At least according to the parts manual...
...(But I've been wrong before...And will be again)... :D
Edit: The manual is correct. OEM 84-87 have "straight" vanes, not angled. (Whew!)... :D
[Modified by Rich B., 8:55 AM 5/26/2002]
Le Mans Master
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From: Silicon Valley Kalifornia
Re: Vane direction on rotors?????????????????? (M2001)
...another reason for spinning the rotor in an 'outward' mode is the reduce the amount of small debris that might collect between the vanes.
