89 240 DL wagon- Had a bad pulse on the brake pedal a week ago so I figured my (year and a half old) front rotors were warped. Pulled them to see both front cylinder pistons were kinda wet. Replaced rotors and calipers so I figured I was good. Still pulses bad. I mean bad. I always figured the rear brakes (and rotors) didnt really do much, and the rear rotors are same age as the front. Could this pulsing be anything else beside warped rear rotors? Thanks!

 

Well.....It sounds like the calipers need rebuilding.....

Wait for others to reply.

 

can you check the runout on both?

 

Do you mean check runout on both rear discs? Dave

 

front and rear. bad backs and junk on the hubs compounding the problem in the front which you'd feel in the steering linkage....but I should talk.... guess what I have to do over the Easter weekend...on two cars... one for PM and one total rebuild.

 

Traveling this week, get back to it next week. Seems like the only reason for pulsing, and it feels to be a constant rythmn, changing with forward speed would be warped discs. and the fronts are new. First I will look at the rears. Dave