Jump to content
Ultimate Subaru Message Board

shuddering: warped disc or bad caliper?


Recommended Posts

I've made a few posts about this 94 Legacy "project car" that has a few minor issues. I just replaced both front CV axles, which I had hoped would solve it's jiggling and shuddering, which seems to come and go. Well, it makes less noise with the new CV's, no more clicking when turning, yet it still does the shuddering, sometimes more, sometimes less, and I feel it in the steering wheel, and seems to be originating from the front passenger side. I read somewhere that it could be either a warped brake disc or a bad/stuck brake caliper. Wheel did not jiggle at all when I replaced CV axle, so I'm thinking wheel bearings aren't issue (but what do I know?).

 

Help! This is driving me nuts!

Edited by 808Legacy
clarity
Link to comment
Share on other sites

warped disc

Lube the caliper while you are in there.

 

Same thought, warped rotors (prolly what you are calling warped disc). I bought my last rotors from Advance Auto Parts on line. Many discount coupons worth a savings of 20-30% off list price. Makes for great pricing.

Link to comment
Share on other sites

Thanks for that tip, I'll start there. I guess I need to take the brake apart and inspect everything first. When I replaced CV, pads looked ok, rotor didn't appear too rough (but warped I don't know, probably not a visual thing, right?)

 

Might be limited on source for new one, as it's on Maui. Napa is only parts store on island. There are a couple junk yards I can check out too, but they're about as limited (and everything rusts over here real fast).

Link to comment
Share on other sites

Thanks for that tip, I'll start there. I guess I need to take the brake apart and inspect everything first. When I replaced CV, pads looked ok, rotor didn't appear too rough (but warped I don't know, probably not a visual thing, right?)

 

Might be limited on source for new one, as it's on Maui. Napa is only parts store on island. There are a couple junk yards I can check out too, but they're about as limited (and everything rusts over here real fast).

 

Rotors are not an item that you would buy from a wrecking yard. All the ones I have ever seen have been rusted badly, and who knows if they are already warped. I still suggest you look up rotor cost on line with Advance Auto Parts. Napa has good quality parts, just 20% higher then other parts stores IMO.

Link to comment
Share on other sites

Yes, Napa is a little more, but only choice on the island (I guess I could ask a few mechanics around too). I won't deal with junk yard, then. Ordering one on line isn't really an option either, as shipping to Hawaii is astronomical.

Link to comment
Share on other sites

Yes, Napa is a little more, but only choice on the island (I guess I could ask a few mechanics around too). I won't deal with junk yard, then. Ordering one on line isn't really an option either, as shipping to Hawaii is astronomical.

 

 

just for grins & giggles - see what these folks can do for you...good quality parts at very reasonable prices - mainland shipping was darn cheap - doesnt hurt to look...

 

http://www.thepartsbin.com/

Link to comment
Share on other sites

Yes,as long as it is still thick enough.

Do both front discs.

 

My thought, is that it is okay to "turn down" a rotor only once, before it gets too thin. The problem with machining down, is that it makes the rotor thinner, which will get it hotter quicker under braking, and more likely to warp again.

Link to comment
Share on other sites

My thought, is that it is okay to "turn down" a rotor only once, before it gets too thin. The problem with machining down, is that it makes the rotor thinner, which will get it hotter quicker under braking, and more likely to warp again.

 

Nothing to do w/number of maching operations but rather how much material has been removed.

That is why they have minimium thickness specs.

I see no mention of previous machining.

 

Would not reccomend it,but,I`ve run over machined rotors w/no ill effect.

Link to comment
Share on other sites

Nothing to do w/number of maching operations but rather how much material has been removed.

That is why they have minimium thickness specs.

I see no mention of previous machining.

 

Would not reccomend it,but,I`ve run over machined rotors w/no ill effect.

 

 

good point, even the pads wear the rotors down.

Link to comment
Share on other sites

Please sign in to comment

You will be able to leave a comment after signing in



Sign In Now
 Share

×
×
  • Create New...