If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
Disk brake pad sizes
I am haveing a spot of trouble with my front disk brakes. The disk
brake kit is on a 65 sedan with dual master cylinder. The front passenger side is not releasing from the rotor. It drags all the time and gets hot enough to sieze the rotor in place until it cools. I believe the pad is supposed to mantain a little contact with the rotor however this caliper is definitely dragging much much harder than it should. My question: are there different pad sizes (thickness)for the ghia calipers ( these are VW factory calpiers)? or it may not even matter if I put a thinner pad in there. Shouldn't the piston inside the caliper release pressure? These brakes only have a few hundred miles so I'm inclined to believe there is an explanation besides worn parts. The pads are virtually new. I ceaned up everything nicely, reassembled and they still drag, just as much as before. Anyone with any ideas? Thanks. Joel Bartlett |
Ads |
#2
|
|||
|
|||
Disk brake pad sizes
jtbartlett wrote:
> I am haveing a spot of trouble with my front disk brakes. The disk > brake kit is on a 65 sedan with dual master cylinder. The front > passenger side is not releasing from the rotor. It drags all the time > and gets hot enough to sieze the rotor in place until it cools. I > believe the pad is supposed to mantain a little contact with the rotor > however this caliper is definitely dragging much much harder than it > should. My question: are there different pad sizes (thickness)for the > ghia calipers ( these are VW factory calpiers)? or it may not even > matter if I put a thinner pad in there. Shouldn't the piston inside the > caliper release pressure? These brakes only have a few hundred miles > so I'm inclined to believe there is an explanation besides worn parts. > The pads are virtually new. I ceaned up everything nicely, reassembled > and they still drag, just as much as before. Anyone with any ideas? > Thanks. > > Joel Bartlett > Yes, the piston exerts slight pressure on the pad, just enough to keep the piston from having to travel very far to energize the brakes. That piston may be stuck in its bore. Not uncommon. With a suitable lever between the pad and rotor, you should be able to push the piston back in with very little pressure. If the pad is so thick that the piston is *already* all the way in, then this is not a fair test. Substitute something (block wood, etc.) thinner than the pad and try again. I don't like to use tools directly against the piston because of possible damage to seals. Speedy Jim http://www.nls.net/mp/volks/ |
#3
|
|||
|
|||
Disk brake pad sizes
"jtbartlett" > wrote in message oups.com... >I am haveing a spot of trouble with my front disk brakes. The disk > brake kit is on a 65 sedan with dual master cylinder. The front > passenger side is not releasing from the rotor. It drags all the time > and gets hot enough to sieze the rotor in place until it cools. I > believe the pad is supposed to mantain a little contact with the rotor > however this caliper is definitely dragging much much harder than it > should. My question: are there different pad sizes (thickness)for the > ghia calipers ( these are VW factory calpiers)? or it may not even > matter if I put a thinner pad in there. Shouldn't the piston inside the > caliper release pressure? These brakes only have a few hundred miles > so I'm inclined to believe there is an explanation besides worn parts. > The pads are virtually new. I ceaned up everything nicely, reassembled > and they still drag, just as much as before. Anyone with any ideas? > Thanks. > > Joel Bartlett > did you replace the rubber flex lines when you put the kit on? i know they usualy come with them, but doesn't hurt to ask.....i'd say your problem is either a bad hose or a caliper that is sticking....not pad thickness....if you got the caliper and pads over the rotor you are good.... |
#4
|
|||
|
|||
Disk brake pad sizes
Calipers and pads are over the rotor but there's not enough clearance and they drag badly.. Piston is not releasing pressure and sticking. So...I'm shopping for a new one. I am thinking if I have a soft pedal and air somewhere in the lines maybe it won't pull back until the air is out of the line. I need to wrangle my wife into brake bleeder assistant. Should be a blast. Thanks for the replies. Joel Bartlett |
#5
|
|||
|
|||
Disk brake pad sizes
"jtbartlett" > wrote in message oups.com... > > Calipers and pads are over the rotor but there's not enough clearance > and they drag badly.. Piston is not releasing pressure and sticking. > So...I'm shopping for a new one. I am thinking if I have a soft pedal > and air somewhere in the lines maybe it won't pull back until the air > is out of the line. I need to wrangle my wife into brake bleeder > assistant. Should be a blast. Thanks for the replies. > > > Joel Bartlett > the piston doesn't "pull back" at all...the piston is only pushed slightly back by the rotor itself...it will always remain in slight contact with the rotor, unless the rotor is warped.... |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
1984 Audi 4000S Quattro brake bleeding | Christoph Bollig | Technology | 2 | August 12th 06 12:14 AM |
Squeaking brake disk shield strikes again (second generation LH cars) | Greg Houston | Chrysler | 0 | July 1st 06 05:42 PM |
Mazda Protege 2001 rear disk brake noise | Martin Forget | Technology | 4 | June 10th 06 04:13 AM |
Can anyone tell the difference between rotors and pads (truthfully)? | jim | Technology | 0 | March 4th 06 02:33 PM |
strange brake problem | Nadia | Audi | 9 | March 2nd 05 08:38 PM |