Ah fair enough,
I take it goes away when warm ? Just a bit of slap ? I don't even drive mine till it's properly warm as it makes me cringe haha. What oil are you using at the mo ? I find that different brands reduce the amount of nois from cold with millers being the best I've tried so far,
As far as I'm aware from my internet digging and info people have passed on, the ver3/4 engines are prone to slap due to the nature of the piston skirt design, so a repacement engine of the same year may not cure it .