I have just put a second hand head on my 1.9 clio diesel (k reg) after the belt broke and it broke the cam etc... (last owner). Well any way all bolted down timed up tuned over by hand fine. Trying to get the diesel pump timed up roughly by hand. Got it just about running but doesnt idle well. Noticed fuel filter housing (bleed putton on the top) was leaking a bit. Bodged it up with some PUR sealer round the top for the moment till i can get a 2nd hand one.
But any way to get to the point... when i rev it to about 3000RPM there is a very loud knocking. My first thought was oh shit thats the valves but i have double, triple checked the timing and so have two mechanic friends and it is all fine. Somebody sugested that the knocking could be air in the fuel getting to the injectors.
Any ideas, Thanks,
Tim