These are tires are fairly new, the kid I bought the car from had put
some new tires on it (they are cheap low-end tires on pimp rims) so
unless one actually failed they should be good. The dealer he got them
from is a good shop chain around here so I'm sure they would do good on
it if it is bad. The car has been sitting for awhile before I fixed the
aneurysm, I was thinking it had gotten a flat spot or something but this
did not happen until maybe 3-40mph and it just came on fast, then
slacked as I slowed down, so the caliper hose or belt issue seems more
likely.
I pulled the caliper and pushed back the pistons, did not get a chance
to take it out and see what is going on but will do that shortly. If
the problem persists I'll order new hoses, or maybe swap on off the
knackered 420SEL and see if it works for now until I can get a new
one. I can also do a front to back tire swap, see if that makes a
difference.
Thanks for the diagnoses, I would not have thought of those aspects.
==FT
On 10/27/17 5:09 PM, G Mann via Mercedes wrote:
Description has all the hallmarks of a tire having tread separation. At
speed, gyroscopic force opens tread separation enough to cause both tire
unbalance [portion of tread is further from center of rotation mass] and
out-of-round, both which cause wheel hop and loss of firm steering control.
I would want to check DOT build date and look at rubber condition of
sidewall closely for any clues of tire rubber breakdown. Also jack up the
offending corner and rotate tire by hand with something placed in reference
to the tread face so you could visually observe any "out of round" however
slight.
On Fri, Oct 27, 2017 at 1:59 PM, fmiser via Mercedes <mercedes@okiebenz.com>
wrote:
Buggered wrote:
At about 40 it started to shimmy really badly the other evening
just a half mile or so up the road. Felt like RF wheel. I came
home and got in a the SD and carried on. Anyway the steering
seems tight enough, tires ok,
Are you _sure_ the tires are okay? That sure sounds to me like
tire trouble.
but RF brake is a bit tight though I can still spin the wheel,
just not as easily as LF.
I’m wondering if I should just replace it (I pulled one off the
knackered SEL,
Most likely it's the hose, not the piston. Based on my experience,
anyway. Especially since it seem to be applying, but not
releasing. That is the classic symptom of a swollen hose.
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