The Brickboard

BrickBoard Archives

The files contained in this listing have been automatically archived from the active forums. Because the vast majority of posts are now in one place, this archive is considered legacy. You should use the SEARCH feature OR choose your topic and select date tabs within the forum you choose.

More front brake pulsing fix[200/1979] posted by Don Willson on
Tuesday, 9 March 1999, at 2:11 p.m.

For 9 months I have been fighting pulsing brakes with 2 rotor turnings and freeing up the caliper pins. I was about ready to go buy new rotors but first I thought I would see how "wobbly" they were. I put a dial indicator on and found they were 0.006 inch and 0.008 inch runout. I cleaned the hub and inside of the rotor. Then I put the rotor on and tightened it down in each of the 5 positions, and on the opposite wheel.
I found a position where the runout was least, about 0.003 to 0.004 inch, and reassembled the wheels. On a run around the block if felt good, I'll go make a highway run and see if it helped.

The Volvo spec is 0.003 inch maximum runout.

And just an gut feel I do not see how uneven torquing of the lug bolts could warp the rotor, at least the removable rotor, that has the straw hat shape.

Don --
'86 744 ZF xmission 120K miles, '89 760TI AW xmission 140K miles.


©Jarrod Stenberg 1997-2016. All material except where indicated. is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.

Powered by Denizen Motive Forum - Custom Software for Volvo Enthusiasts