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displaying posts 1 to 20 of 20
| Author | Subject: Rear brake imbalance on MOT |
 simauto
Newbie  Location: ballymena Registered: 12 Nov 2010 Posts: 8 Status: Offline |
Post #1
Hello everyone, I'm new to the world of 306's, i've bought my wife a 2000 HDI medderian and it was up for MOT and has failed on a 50% imbalance on the rear right hand side. I've removed the callipers, cleaned a greased the pistons and went for a retest last night and it failed again on the same thing. its was 48% this time. hand brake is passing ok its just the foot brake. any info or advice would be great Thanks Derek |
 Posted 12th Nov 2010 at 18:38
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lotek
Seasoned Pro  Location: Berkshire Registered: 04 Dec 2007 Posts: 6,107 Status: Offline |
Post #2
Bias Valve seized? kinked or creased brake line to one of your calipers restricting flow? |
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Posted 12th Nov 2010 at 18:47
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simauto
Newbie Location: ballymena Registered: 12 Nov 2010 Posts: 8 Status: Offline |
Post #3
Unsure mate, i've read about this bias valve, i'm to take a look for it in a mo. |
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Posted 12th Nov 2010 at 18:51
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footah212
Senior User  Location: Paisley Registered: 16 Sep 2010 Posts: 861 Status: Offline |
Post #4
Agree with lotek.Bias valve or damaged lines ________________________________________ Phase 2 Blaze GTi6PS3 - Black Ops 2 Engine crane for hire Renfrewshire |
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Posted 12th Nov 2010 at 18:57
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lotek
Seasoned Pro Location: Berkshire Registered: 04 Dec 2007 Posts: 6,107 Status: Offline |
Post #5
grab hold of it and move it , should spring back on own accord if not then vigorously wiggle back and forth like FOOK, spraying loads of WD40 or whatever on to it.May have air in brake line aswell, give them a bleed  |
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Posted 12th Nov 2010 at 18:54
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simauto
Newbie Location: ballymena Registered: 12 Nov 2010 Posts: 8 Status: Offline |
Post #6
thanks for the tips lads. very helpful forum! |
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Posted 12th Nov 2010 at 18:57
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welshpug!
Capt Pedantic  Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,839 Status: Offline |
Post #7
try bleeding the brakes, a seized load compensator will affect both rear brakes.try swapping the discs and pads side to side. ________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 12th Nov 2010 at 18:59
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simauto
Newbie Location: ballymena Registered: 12 Nov 2010 Posts: 8 Status: Offline |
Post #8
the brake pads and discs where fitted with new ones bfore the mot |
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Posted 12th Nov 2010 at 19:41
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lotek
Seasoned Pro Location: Berkshire Registered: 04 Dec 2007 Posts: 6,107 Status: Offline |
Post #9
Bleed the brakes, then free off the bias valve.all will be fine after that.. |
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Posted 12th Nov 2010 at 19:46
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simauto
Newbie Location: ballymena Registered: 12 Nov 2010 Posts: 8 Status: Offline |
Post #10
Right lads, went for a route round below the car for the bias valve and couldn't find it.but i did find this at the right rear.  excuse the more iphone pic Could this be the problem? seems to connect the 2 sliding pins for the rear caliper. |
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Posted 12th Nov 2010 at 21:22
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footah212
Senior User Location: Paisley Registered: 16 Sep 2010 Posts: 861 Status: Offline |
Post #11
That bracket should be all one piece, thats for sure.Not sure it will 100% be the cause of the problem but it ain't right. You should be able to get one from a scrappy easy. the bias valve is on the RH side just forward of where the photo is taken. It has spring attached to it. ________________________________________ Phase 2 Blaze GTi6PS3 - Black Ops 2 Engine crane for hire Renfrewshire |
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Posted 12th Nov 2010 at 21:57
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midlife
Seasoned Pro  Location: Colne, Lancashire Registered: 13 Mar 2006 Posts: 7,544 Status: Offline |
Post #12
This is what you should be looking for   ________________________________________ Get used to seeing the yellow one !!! Team 330™ Team "no front end or engine" Team "LIMITED EDITION" I live for the 306 sticker  Team 0-60 in 6.44 & standing qtr in 14.808 @ 94.55mph all with std engine 203bhp Corolla T-Sport daily driver stealthier than Kwai Chang Caine |
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Posted 12th Nov 2010 at 22:17
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simauto
Newbie Location: ballymena Registered: 12 Nov 2010 Posts: 8 Status: Offline |
Post #13
Thanks mate, pics speak loader than words |
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Posted 12th Nov 2010 at 22:21
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welshpug!
Capt Pedantic Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,839 Status: Offline |
Post #14
that wont cause any issues bar a fail of an UK MOT  being a 2000 car, it may not have a load compensator as it could have EBD. ________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 12th Nov 2010 at 22:30
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simauto
Newbie Location: ballymena Registered: 12 Nov 2010 Posts: 8 Status: Offline |
Post #15
does anyone know what the bit of metal that is broke does? |
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Posted 12th Nov 2010 at 22:35
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welshpug!
Capt Pedantic Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,839 Status: Offline |
Post #16
not much its a lock plate to stop the bolts from coming loose. ________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 12th Nov 2010 at 22:41
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simauto
Newbie Location: ballymena Registered: 12 Nov 2010 Posts: 8 Status: Offline |
Post #17
back to the drawing board then |
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Posted 12th Nov 2010 at 22:45
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tabbbster
Seasoned Pro  Location: Turriff Registered: 04 Nov 2005 Posts: 3,826 Status: Offline |
Post #18
Mine Nearly failed the last MOT on this and it was the sliders in the rear calipers. The lower one on both sides was seized. I knocked them out cleaned them up with fine sand paper. Greased them back up popped it all back together and the inbalance was gone.  ________________________________________ My Rallye was built on thursday 7th January 1999 according to the cosmic code generator.My Cyclone refurb |
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Posted 13th Nov 2010 at 04:12
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armzsc6
Seasoned Pro  Location: Crowborough Registered: 22 Mar 2008 Posts: 3,445 Status: Offline |
Post #19
I cant see how this is a faliure... you can only fail a car on front imbalance, rear is not measured... you could have a stupidly low amount of braking force on one side and if the other 3 all lock it is still a pass providing over 50% of wheels lock... Total brake efficiency must be more than 50 % for service brakes and 15% for hand brake. You can however fail a car for little to no brake effort if you so choose. I would take the caliper off, free up the piston, bleed it out and re fit. problem sorted. As welshpug said bias valve would effect both rears.________________________________________ Black power baby! SUUUUUPERCHARGED Seat Leon FR TDI 190BHP 300lbft daily gti-6 killer :p 12x 306's owned so far Cambelts, clutches, service work carried out on All makes and models, Peugeot Citroen / mitsubishi specialist. Pug planet / Citroen Lexia diagnostics / code reads available. |
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Posted 13th Nov 2010 at 06:26
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306weasel
Regular  Location: Whitburn Registered: 09 Aug 2005 Posts: 232 Status: Offline |
Post #20
welshpug! wrote: being a 2000 car, it may not have a load compensator as it could have EBD. Correct ________________________________________ Car#1 306 HDi Meridian 5door, 133Bhp, 225lb.ft Ecosse R/R 20/3/05Car#2 306 1.4 3door track car with Gti6 power. 167Bhp, 134lb.ft Ecosse R/R 21/10/07 Car#3 Grand Scenic 1.9DCi (Expanding!) family mover. |
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Posted 14th Nov 2010 at 00:52
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