i ve fitted this le mans dump valve off a cossie but it only make a noise at about 4 and a half thousend revs is this normal???oh n its quiet :yuck:

doesn sound right - you should have bought my baileys dv 36

the noise may be down to the internal spring of the valve, if it's adjustable, try loosening the tension and that should sort you out.

I suspect you have fitted it incorrectly. Mine was and I had the same problems you experienced. Get a proper garage to have a look at it !

ok guys thanks i ll have a look at doing that