mark b
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| posted on 4/8/14 at 09:06 PM |
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brake bias valve
Hi everyone will my car pass the iva with a manual bias valve fitted?
Cheers
Mark
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MsD
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| posted on 4/8/14 at 09:20 PM |
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The manual says no (presuming you mean a brake fluid proportioning valve?) but it all depends if its found during the test 
Mark.
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Acc8braman
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| posted on 5/8/14 at 07:26 AM |
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Bias Valve - Will fail if not locked off
Proportional Value - will fail if its adjustable and not locked off
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renetom
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| posted on 5/8/14 at 08:16 AM |
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bias
Hi
failed our first IVA because rear brakes were locking up first
asked the examiner he suggested auto one from metro
But did say no adjustable one , not even if its locked off.
This is our one:
 
Description
Good luck
René
I believe this no no is actually mentioned in the IVA manual
[Edited on 5/8/14 by renetom]
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CosKev3
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| posted on 5/8/14 at 12:15 PM |
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quote:
Originally posted by Acc8braman
Bias Valve - Will fail if not locked off
Proportional Value - will fail if its adjustable and not locked off
From my understanding only bias bars on pedal boxes are alllowed,and must be locked off.
No inline bias/proportional valves are allowed if adjustable at all,even locked off.
Inline ones must be non adjustable.
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Acc8braman
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| posted on 5/8/14 at 06:42 PM |
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I used an adjustable proportional valve on my car, IVA guy wasn't happy about it, but passed the car on the previso I went home and locked it
off as it will fail an MOT in three years 
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CosKev3
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| posted on 5/8/14 at 08:55 PM |
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quote:
Originally posted by Acc8braman
I used an adjustable proportional valve on my car, IVA guy wasn't happy about it, but passed the car on the previso I went home and locked it
off as it will fail an MOT in three years
lucky there then!
as its down in black and white in iva manual nothing adjustable allowed in line.
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mark b
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| posted on 6/8/14 at 05:57 AM |
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Thanks for your help everyone I did think about looking in the manual but sometimes its as clear as mud.....I did think about just removing it just
for the test....but that seems to be out of the question too what other options are there other than a metro one?
Thanks again everyone
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renetom
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| posted on 6/8/14 at 06:16 AM |
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Hi
Early Range rover fitted as std in the rear brake line
It looks a bit neater than the metro one.
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mark b
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| posted on 6/8/14 at 07:42 AM |
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The trouble is there's not many of these cars about these days as they all have ABS :/
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CosKev3
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| posted on 6/8/14 at 09:19 AM |
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http://m.ebay.co.uk/itm/230757545568?nav=SEARCH
Fiestas have a good one to use
They are screwed into the mc, so have handy m10x1 threads so you can screw into mc or use one in line.
I haven't tested mine on rollers yet but getting someone to put foot on brake until front wheel locks you can still turn rear wheel.
[Edited on 6/8/14 by CosKev3]
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mark b
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| posted on 7/8/14 at 08:23 PM |
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Now that does look like a good option
and thanks for the link
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