![]() |
Register or Log In To remove these advertisements. |
|
|
![]() |
|
Thread Tools | Display Modes |
|
![]() |
#1 |
Registered User
![]() Join Date: Aug 2008
Location: Austin, Texas
Posts: 78
|
new rotors - turn or not?
I'm in the middle of a frt disc brake conv on my 70 c10. I have brand new rotors. Should I have them turned before install? The surface appears smooth and non-directional already.
Thanks. |
![]() |
![]() |
![]() |
#2 |
Step Brother
Join Date: Sep 2007
Location: K-town
Posts: 4,029
|
Re: new rotors - turn or not?
No if they are new they should be good to go......
![]() |
![]() |
![]() |
![]() |
#3 |
Middle-aged Curmudgeon
Join Date: Jun 2008
Location: Independence, MO
Posts: 753
|
Re: new rotors - turn or not?
|
![]() |
![]() |
![]() |
#4 |
Between Trucks...
Join Date: Mar 2002
Location: Los Angeles, CA.
Posts: 3,830
|
Re: new rotors - turn or not?
![]()
__________________
Beat it to fit, Paint it to match... ![]() |
![]() |
![]() |
![]() |
#5 |
Registered User
Join Date: Apr 2006
Location: East Sooke B.C. Canada
Posts: 543
|
Re: new rotors - turn or not?
I am a mechanic and work in a shop, we machine all new rotors. For us its just not worth the hastle of redoing the job when the rotors are not true. I have found about a 30% fail rate on new rotors, as far as having too much runout. I have also found about 2% being too bad to even bother machining. When I do brakes at home, I just take my chances.
|
![]() |
![]() |
![]() |
#6 |
Registered User
Join Date: Aug 2005
Location: Pasadena,Tx /Pto Pta DR
Posts: 5,415
|
Re: new rotors - turn or not?
|
![]() |
![]() |
![]() |
#7 |
Registered User
Join Date: Aug 2005
Location: Pasadena,Tx /Pto Pta DR
Posts: 5,415
|
Re: new rotors - turn or not?
Turning your new rotors off the car/truck really IMO is not really needed unless you bought some really inexpensive ones. If you are looking for the maximum performance,Yes i would turn them installed on the vehicle. Thats the best way and most manufacturers are doing it now
|
![]() |
![]() |
![]() |
#8 |
Born Psycho
![]() Join Date: Feb 2001
Location: brentwood,cal,usa
Posts: 4,884
|
Re: new rotors - turn or not?
definitly have them turned. i also work in a shop and it's cheap insurance to turn them before installing them. normally they are pretty close to being true and a couple thousandths will true them. a lot depends on where they were purchased--if they are cheap rotors and/or were not stacked properly in the warehouse they can be off quite a bit.
__________________
jerry moss 72 cheyenne super K20- tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,tow hooks,bumper guards,toolbox,aux. fuel tank,posi front and rear,plus other goodies!!! SOLD 69 suburban K20-tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,4 inch all spring lift,4 speed, 14 bolt full floater, dana 44 HD,warn winch,posi front and rear,tow hooks,plus other goodies. 73/80 chevy/gmc K20 SB400,turbo 400,205,tilt,a-c,gas hog. 77 K/5 cheyenne blazer-daily driver/beater. SON HAS IT NOW BRENTWOOD,CALIFORNIA |
![]() |
![]() |
![]() |
#9 | |
Registered User
Join Date: Aug 2005
Location: Pasadena,Tx /Pto Pta DR
Posts: 5,415
|
Re: new rotors - turn or not?
Quote:
![]() Yeah we only charge $8.00 per rotor to our customers but I am too lazy to do my own. |
|
![]() |
![]() |
![]() |
#10 |
Senior Member
Join Date: Apr 2005
Location: Joppa, Maryland
Posts: 4,408
|
Re: new rotors - turn or not?
I guess it's 50/50 on the subject. I have always just put them on. Never a problem. I do, however clean them with brake clean before final assembly. JMO
__________________
1997 GMC Sierra Ext 1965 Mustang |
![]() |
![]() |
![]() |
#11 |
Firefighter
Join Date: Feb 2001
Location: Yellville, Ar, USA
Posts: 1,943
|
![]()
1pc. rotor like yours just put it on and run it, 2pc. like a 4x4 that is seperate from the hub then those need to be turned!!!!!
__________________
'72 Chevy SWB 350 Auto '67 GMC LWB 350 4 speed '70 Chevy 4x4 Stepside 350 Auto Yellville, Ar. USA ![]() ![]() |
![]() |
![]() |
![]() |
#12 |
Registered User
Join Date: Jun 2005
Location: Scottsdale, AZ
Posts: 615
|
Re: new rotors - turn or not?
I always check the run out first if they are off then I have them turned.
|
![]() |
![]() |
![]() |
#13 |
Middle-aged Curmudgeon
Join Date: Jun 2008
Location: Independence, MO
Posts: 753
|
Re: new rotors - turn or not?
Good point. They have a preservative film on them so they won't rust while sitting on the shelf. You can just slap 'em on and run 'em, but they'll stink the first time or two you hit the brakes while the preservative is burning off. After that they're fine.
|
![]() |
![]() |
![]() |
Bookmarks |
Thread Tools | |
Display Modes | |
|
|