ok so put my new head on this moring and set up clearance as have had new rocker arms. started her up all good if a little metel rattle noise. seemed to be running fine came up to temperature all ok when for a test run was ok. after 10mins or so it now sounds rough as anything no smoke or anything just rough. would bad valve gaps cause this??

What did you set them to and how did you set them?


Lynall