[Tigers] Stock Brake Rotor Eval?

[Ron Fraser]

Terry
	Cracks in the brake disc are usually cause by too much heat.

I have not experienced anything like this on my Tiger, on other vehicles,
yes. I normally get a pedal feedback which means something is going bad and
needs repair or replacement.

If you do not intend to do Track Time or hard heavy braking they could be OK
for awhile.

I would say that if the rotor can be turned to eliminate the cracks without
taking too much material off; they could be OK.   Otherwise doorstops.

I'm not sure what the min thickness is allowable for the rotor; it's not
listed.  I believe the original thickness is about .5" and I believe the min
should about .45".


Safety first and always

Ron Fraser

-----Original Message-----
From: tigers-bounces at autox.team.net [mailto:tigers-bounces at autox.team.net]
On Behalf Of Terry Packer
Sent: Wednesday, January 22, 2014 1:42 PM
To: tigers at autox.team.net
Subject: [Tigers] Stock Brake Rotor Eval?


While apart for other service, close inspection of one front brake rotor
revealed 2 very fine radial cracks. Both are on the same side of the disk
only, in the middle of the
friction face,  and do not extend to the perimeter
of the disk. One is about 1/2" long and can be detected with a fingernail.
The other is longer but cannot be felt. The longer one looks like it could
be connecting a series of tiny flaws in the original casting material. Also,
it is quite possible these have been present for a very long time already
and have simply gone undetected until now.


We all agree already that brake
components are relatively cheap and prudence would advise simply tossing
anything at all about which there is a question. So that wisdom need not be
repeated. But I was nevertheless curious to hear whether there's any
experience with this particular symptom that might cause me to think
differently. So. . . .


1) Is this disk definitely a doorstop?
2) Is this
disk only probably a doorstop? or
3) Is it at all possible these cracks are
not uncommon in old castings and should not cause undue concern?

Wisdom
always appreciated


Terry Packer
9470018
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