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YOUR RESEARCH996 brake question/problem ? with pics
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Install calipers
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Performed · outcome unconfirmed · Original poster
Then again this is the same shop that installed the calipers on backwards (little pistons leading).
Leading evidence: 'Install calipers' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Install calipers' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Performed · outcome unconfirmed · Original poster
When the shop I used installed the hubs, they claimed they needed to take a little metal off of the hub in order to make the rotor fit flush.
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Performed · outcome unconfirmed · Original poster
When the shop I used installed the hubs, they claimed they needed to take a little metal off of the hub in order to make the rotor fit flush.
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Can you guys tell me what the purpose of the metal cylinder here is (first pic)? It is the one that looks like it is almost touching the rotor.
I just installed 996 brakes onto my 87 Carrera, and have had brake squeal issues when my brakes are hot. I couldn�t figure it out, but took a look at the backside of my front rotor and found this (second pic):
Obviously it looks like the cylinder in picture 1 (but on the backside of the caliper) is making contact with the rotor (couldn't squeeze my camera in there but saw it with my own eyes). Is it supposed to? What is it there for? Is it some elaborate mechanism to let you know when your pads are low? Can I adjust it back with the brakes on the car?
In the first picture (outer part of the rotor) it is about 4-5mm away from the rotor. On the side that it has scratched the rotor, it is almost touching. My theory is that since it is almost touching, when the brakes heat up, it expands just that much so that it does touch and makes the noise. Any ideas? Thanks.
It's a support bar that supports the base portion of the pad. Look at the front of the caliper and you'll see it goes through-and-through. Is your rotor a 996 rotor, or a different one that is too thick?
its an anti-air cooled converter rod designed to not work on real Porsche's
just kidding......
it only happens when HOT? then its expanssion ? so you are only talking a couple thousanths of an inch... grind off a little if you can
Think you need to disassemble the brakes. Something's not right. That post should not make contact with the rotor.
Oh, better add that before you button everything up again you need to remove all traces of aluminum from cast iron rotors. Use a drill motor with some coarse sanding discs. No need to remove any base metal cast iron from rotor surface just rough up surfaces to remove all traces of aluminum.
Sincerely,
Macster.
All components are stock except for the hubs (that are needed for the adaptation to 911 offsets).
Ok so those are there to hold the pad in place? And they are not supposed to move?
well depending on the mount relationship to the center of the rotor, the entire caliper might be "off center" and causing a rub on one side. It may be required to "shim" the caliper in order to get it centered, but for me, i would not like that... after all, this is your brakes we are talking about. Any shim might reduce the affective ridgitity of the entire caliper and have some bad results.
I do agree, remove it and look is step one... since its a conversion there might just be issues that you have to work thru
Yes it is most likely off-center. I just wanted to make sure they were not adjustable...
When the shop I used installed the hubs, they claimed they needed to take a little metal off of the hub in order to make the rotor fit flush. I don't think they thought about what taking a mm or two of metal would do to the rotor-caliper alignment.
Then again this is the same shop that installed the calipers on backwards (little pistons leading). It is not a stock kit so I have cut them some slack in the past, but this may be a deal breaker...
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