ok just go tback from my main dealer renault enfield,
the valve is not missing, when he had it on the ramps & put his hand onthe valve the knocking stopped? he has a cup on the forecourt which does exactly the same as he checked that one too, then we went for a blat & absolutely smoled the f**k out of the brakes on several long straights! from 60 & 40 & more etc, &the brakes provided plenty of feel & stopped the car like proper, he said when the car comes in on monday for the top mounts they will send the valve away for warranty inspetction & replace if necessary, i will insist they do, I will be let you know what happens this afternoon at the bedford autodrome & report any further findings regarsd to the braking & how it is effected, the renualt dealer assured me there is no problem, unless of course the valve is missing? which mine isnt.