Hope someone can help?

Just done the timing belt in my Escort gti and after starting the engine its tapping like an old 1.3 ohv engine!! Well not quite as bad but close!!

I have checked and adjusted everything 3 times and as far as im aware everything is bang on correct

Anyone got any ideas what could be wrong? Hope ive not done any damage?

The engine idles and runns fine BTW. Any hepl would be great