Powerflex Mk4 - Non
Join Date: Jul 2011
Location: United Kingdom
Yes CJ, I realise the insanity of the idea, but it was a calculated risk to get a car that was not going, going. I need to get it to a garage as I am not going to change brake components myself, so The wheels came off, it was then heavily de iron'd with Auto Finesse Iron out to remove all the brake dust (including on the friction surfaces and in all visible areas including the pad access point on the front. Then power washed, then de iron'ed again, then power washed again, and the GT85 was then applied to the pistons & pins etc. This was partly to free anything seized and also to help ensure the influx of water from the cleaning process didn't cause anything else to seize!
Yes, some got on the friction surfaces for sure, and that was demonstrated in the complete lack of brakes I had for the first 10 times I used them!!! But I used a small 1 mile run of duel carriageway that was quiet to get my brakes back by accelerating to 70 and braking to 20 to go round the roundabout at each end of it until the GT85 had been scrubbed off the surface and a decent(ish) stop was back.
net result is I no longer have a heavy bind, but I do have the vibration/pulsing on braking which is symptomatic of the warped disk.
Risky, but I was out of options, short of having it recovered to AL from my house which is a circa 90 minute drive.
@ Pete, agreed, the GT85 has made it better so its possible the pistons are worn and need a refurbish. That's why its going to AL. I bought the disks anyway as I wanted to upgrade, but AL will be able to fix any underlying issues that may have caused the problem I have now.