MG-Cars.info

Welcome to our Site for MG, Triumph and Austin-Healey Car Information.

Parts

TR parts and Triumph parts, TR bits, Triumph Car Spares and accessories are available for TR2, TR3, TR3A, TR4, TR4A, TR5, TR6, TR7, TR8, Spitfire and Stag and other TR models are available from British car spares and parts company LBCarCo.

Triumph TR6 - Front brakes

I have just fitted drilled discs and green stuff pads on my 6. On the test run came back and the discs were very hot and I mean really hot, is this natural when changing pads until they bed in properly?..This also lead me onto if I have been supplied with the correct pads. I understand that there are metric and imperial, can anyone tell me what is the actual difference between the 2? I know that calliper brake pipe threads and the securing pins are different but is there any actual size difference in the pads. Having jacked the car up they don’t appear to be binding as the wheel turns freely .but not sure if they are sticking.
M Wright

M Wright,
The metric and "inches" have to do with the fasteners holding the calipers onto the frame. The pads should be the same regardless of those difference...; however, the type and width of the rotor MAY affect the space for the pads. Eventually they should bed in anyway. Don't know how hot, hot is, but I'd imagine the temperature of the rotor can get way up there depending on how severely you've been braking. There's also some discussion here in the archives about green pads working better after getting hot, and regular pads fading some at higher temperatures, but that's all beyond my ken. Steve Pike could wax long and detailed about such technical details for you.

Steve??
db
Doug Baker

If you jack up a front corner, does the wheel spin easily? Or is there excessive drag between the pads and rotors?
Are your rear brakes adjusted properly? If the front brakes only are stopping the car, that could cause some heat issues!

Rod
Rod Nichols

I would suggest that you verify that you got the correct pad for your application. Look closely at your calipers, they should be either stamped or cast in raised nomenclature to identify the calipers as either 16P, 16PB (both use Girling GP81 pads) or 16M (uses GP283 pads) calipers. The 16M are the metric units.

There are some slight, but critical, physical size differences between the 16P/16PB calipers and accompanying pad sets and the 16M calipers and pad sets. The pads for the 16P/16PB calipers are a little thicker (~.5mm/~.020"), a little deeper set from the outer swept diameter to the inner swept diameter (~5mm/.20"), but slightly shorter along the disc rotation run (~.7mm/~.028").
Steve Pike

Well it appears that I have metric pads in imperial calipers. I adjusted the back brakes up slightly and took the car out and tried to stop using the handbrake to see it they still got hot. They were hot but not excessive. jacked the car when I got back and both wheels were running freely. So going to give it a try running them for a while.

Thanks for your comments will let you know how it goes.

Regards
Malcolm

M Wright

M Wright
Is your brake hose old? Sometimes the rubber line compresses when applying the brakes and the pads get hung up and won't release right away. This will overheat the rotors. This happened to me. New brake hose solved my problem.
Jim K
J.P. tr6man

This thread was discussed between 12/09/2008 and 18/09/2008

Triumph TR6 index