My rev4 n/a failed it's MOT the other week on handbrake efficiency and had general poor rear brake efficiency. So no big deal I thought, it'll be a cable or a calliper. I examined the o/s calliper and the handbrake mechanism was seized. A good dose of WD40 and a bit of tapping the mechanism back and forth and it freed it up a bit. It seemed to pull when applying the handbrake at a slow roll and I thought it'd be enough to pass and then I'd strip it all properly and clean both callipers up. Next day, put it on the rollers and it did fukc all. Hardly any braking. So this time one of my colleagues did the same for me ( I work in a VW dealership and he has access to a ramp on Saturday afternoon) again he gets it freed up and working when it's up in the air but by the time the wheel hit the ground there's sod all happening when the handbrake is applied.
Again I think, no major issue, I have two spare rear callipers which were destined for my V6 but I'll chuck them on there and that'll put it right. Whilst I'm at it I ordered new cables and pads and then got carried away and added a set of braided lines to my eBay addiction. Belt and braces fix, nothing left to go wrong? Yeah I thought so. The above £200 shopping list all bolted on, bled and ready for the rollers.
And the difference. Absolutely none, or at least not enough to pass an mot. The near side pulls 200 whatever brakes are measured in. The off side struggles to reach 50 and this is mirrored on both the handbrake and foot brake. My colleagues who know more than I do about anything oily and mechanical are now guessing that I've just got two duff callipers. How likely is that? My rev1 had one calliper replaced in 23 years and 160k miles. I know it's possible but are there any more likely causes.
I hadn't planned on having two money pits when I bought the second MR2 but it's starting to turn out like that.
just in case the mot failure sheet means any more to anyone than it does to me.