Guest brownd95 Posted June 6, 2010 Share Posted June 6, 2010 hi everyone, i have a renault clio 1.2 8v mk2 w reg. i took it for an MOT at the weekend and it failed on a seized load sensing valve linkage. i have got under the car and sprayed it with wd40 and used a pair of grips move the linkage. now my question is " how loose should the linkage be?" i can move the linkage up and down the pin with the grips with some freedom bearing in mind it is a component connected to a spring. should this now pass the MOT?? please help thanks brownd95 Link to comment Share on other sites More sharing options...
mr_arc Posted June 6, 2010 Share Posted June 6, 2010 it should do, it's meant to move when you put more weight in the back of a car - that is going to put more force on it than a pair of mole grips will. grease it properly though, WD40 is a water displacement product, not a lubricant or freeing agent. Link to comment Share on other sites More sharing options...
ducatiboy Posted June 6, 2010 Share Posted June 6, 2010 the linkage may not be the problem you need to make sure the valve is operational or it may fail the test again. I had one go on me i just cut it out and added more brake line, it worked fine after that and passed the test Link to comment Share on other sites More sharing options...
brus Posted June 6, 2010 Share Posted June 6, 2010 it should do, it's meant to move when you put more weight in the back of a car - that is going to put more force on it than a pair of mole grips will. grease it properly though, WD40 is a water displacement product, not a lubricant or freeing agent. Beg to differ but extract from WD40 website:: FIVE PRODUCTS IN ONE - THE 5 FUNCTIONS WD40 Top Tips wd40 can : IMAGE: WD40 can 200ml * CLEANS: WD-40 gets under dirt, marks and grease making it easy to wipe away. It also dissolves adhesives, allowing easy removal of labels, tape, and stickers * PROTECTS: WD-40 protects metal surfaces with corrosion-resistant ingredients to shield against moisture and other corrosive elements * LUBRICATES: WD-40's lubricating ingredients are widely dispersed and hold firmly to all moving parts * PENETRATES: WD-40 loosens rust-to-metal bonds and frees stuck, frozen or rusted metal parts * DISPLACES MOISTURE: Because WD-40 displaces moisture, it quickly dries out electrical systems to eliminate moisture-induced short circuits. Turn the power off before you spray Also see:: http://www.wd40.co.uk/media/images/a/8/LIST_OF_2_000_USES.pdf Link to comment Share on other sites More sharing options...
carosio Posted June 6, 2010 Share Posted June 6, 2010 Perhaps what Mr arc meant was that WD 40 is primarily a water repeller although it does have lubricating and penetrating properties, but not formulated to resist (for long) parts exposed to the weather. Link to comment Share on other sites More sharing options...
mr_arc Posted June 8, 2010 Share Posted June 8, 2010 that is what i meant, i mean if you read the blurb that brus has posted it even says that it cleans grease off!! Link to comment Share on other sites More sharing options...
Total Chaos Posted June 8, 2010 Share Posted June 8, 2010 hi everyone, i have a renault clio 1.2 8v mk2 w reg. i took it for an MOT at the weekend and it failed on a seized load sensing valve linkage. i have got under the car and sprayed it with wd40 and used a pair of grips move the linkage. now my question is " how loose should the linkage be?" i can move the linkage up and down the pin with the grips with some freedom bearing in mind it is a component connected to a spring. should this now pass the MOT?? please help thanks brownd95 Dont know,but wont they charge you again to retest it as you have taken the car out of the garage and repaired it yourself rather than the garage do it and retest for free? Link to comment Share on other sites More sharing options...
ducatiboy Posted June 8, 2010 Share Posted June 8, 2010 Is this thread about WD40?...... If the linkage is movable and the rear brakes dont work sufficiently to stop the rear wheels when in test it is very likely the valve reamins closed and no extra brake fluid is available to the actuator(discs or drums). So either cut ot out and pipe thro directly or replace it. Hope that helps. Link to comment Share on other sites More sharing options...
cj-1 Posted August 6, 2013 Share Posted August 6, 2013 I have the same problem with my 1998 Clio Grande RN 1.2 8v. Failed the MOT on a lot of little things but the brake load sensing valve was one of the things on the list. Has anyone got a part number please? Cheers Link to comment Share on other sites More sharing options...
Shogun Posted August 6, 2013 Share Posted August 6, 2013 The load sensing valve can not be bypassed if the car was made with one it must be there to pass the MOT you may have freed it off with the w/d but the pistons in the valve may still be stuck,get under the car and get someone to sit on and off the back and see if the valve mechanism is moving freely up and down. Link to comment Share on other sites More sharing options...
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