Quote:
Originally Posted by
kinioo
The other thing I discover yesterday is something I don't know how to explain (may take some pictures later), but RHS (clutch side disc, which causes the problem) is bending/flipping when I press it with my fingers - what I mean is I can literally flip it to the left to slightly change its position (so its not rubbing the calliper) but once the brake is applied it gets back (flips back) to its original position and rubs the calliper.
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That is the primary symptom of the seized and gummed up bobbins you've identified. The discs should "float" on the carrier with a fairly light touch. If they are sticky or stuck the disc will tend to get marooned in one position or other and move jerkily (if they move at all) as you have found.
OE discs are cheaper than decent aftermarket discs (EBC etc.) on the front, so buy OE. You can get cheap Chinese wave discs but they are more trouble than they're worth!
Interestingly at the rear, it's a different story - the OE disc is double the price of an EBC item!
Provided you can get the disc bolts out without damage then they'll be fine to re-use with a thin application of Loctite. If in doubt though - change them. Don't buy OE bolts though as they'll end up costing you as much as the discs! Go visit your local fastener shop.
Fitting new pads with new discs is always advisable even if you think they are fairly new/good; especially so if the discs haven't been running true.