Technical Binding Calliper

[RD55 DUN]

Guys,

Got a sticking rear passenger calliper on my Mjet, gives off a horrible burning smell and will probably be affecting performance of the car. Notice/ feel binding when stopping, reversing and taking off.

The rear pads were changed about 2 months ago and has really only happened since then. With the rear callipers being threaded is there much that can be done to free these off. Or am I best going for a new calliper?

Has anyone experienced this before and managed to sort it?

Has a search on the forum but nothing really for the Mjet.

Cheers

 

[phil0254]

Now i will start by saying i find it hard to believe you have a sticking caliper..Reason being i was briefly behind you last week on the A725 at about 6pm and your car looked fine lol ,as i moved to the left you indicated and moved to the right ,so you would have had parks on your right ...And no you weren't speeding

On a serious note , my first check would be ,remove pads and see if caliper is moving free in it's guides ,may just need a clean and copaslip ,after all as pads wear ,guides are exposed ,get rusty you fit new pads push guides back and they stick ,also passenger /gutter side ,if any side sticks it's the passengers ..Also did you clean the caliper where the pads sit ,as occassionally pads will stick if they aren't free ...

 

[RD55 DUN]

Haha, nice to be spotted.

I checked the caliper on saturday, and the new pads fitted are gone, about 1mm if that on both sides.

The metal runners which the pads sit in were copper slipped up, however were also covered in dirt, dont know if this is brake pad residue. The calliper piston wound back no problem, managed to use the re-wind tool by hand. The slider pistons however were fairly tight, did move back and forward with some persuasion back and forward.

 

[DavisTjet]

iv just put 2 new calipers on a Mjet at work (rear) 1 was leaking and the other was siezed solid, hard to get but i managed to get them from Unipart and trade they are about 70-80 quid each plus VAT... not cheap unfortunatly.

 

[RD55 DUN]

Yeah i have seen the price for them, pretty expensive imo.

I was asked to confirm a cast number, does this mean there are several variants of calliper?

 

[phil0254]

i would be more tempted to give everything a good thourough clean and lube on the guides .make sure the pads fit with out having to hit them in to place .if that doesn't work them yep caliper ..a good clean costs nothing but time .and i'm guessin it has only happened since pad renewal

 

[RD55 DUN]

i would be more tempted to give everything a good thourough clean and lube on the guides .make sure the pads fit with out having to hit them in to place .if that doesn't work them yep caliper ..a good clean costs nothing but time .and i'm guessin it has only happened since pad renewal

By guides, do you mean the metal seats that the pad sits in? If so I gave them a thorough clean at the weekend, there was lots of debris/dirt in them, but still felt well “lubed”, I assumed this to be a mixture of existing copper slip and brake pad deposit. I cleaned these up using carb cleaner, then applied plenty of slip. Outer face pad went on no problem, the inner side wasn’t as easy but I wouldn’t say difficult.

The 1mm of meat on my pads is now gone. Again took it off last night, along with the carrier, moved the carrier pistons back and forth, however I noticed when I pushed both of them in, the top cylinder returned to “normal” quicker than the bottom one, could this be the issue?

New calliper and pads have been ordered, should arrive today.

Thanks

 

[RD55 DUN]

Thinking it may be the Carrier also due to the pistons. Thought these came with the calliper, they are an extra item from Main Dealer only

I hate my car just now haha!

 

[matty seasider]

any updates to this?

 

[RD55 DUN]

any updates to this?

Yes got this sorted.

Turned out to be a sticking piston, along with one of the sliders within the carrier. Both were taken out, cleaned and re-lubricated, done the same on both carriers.

New calliper was fitted, along with a new disk and pads on that side.

Now works like a dream