Farmer42
Club Member
You should have 8 thou (0.2mm) on the inlet and 10thou (0.22mm) on the exhaust when the engine is cold.
If you timing chain is slack, I would strongly recommend that you check your timing marks on the cam sprocket line up. There should be a mark that lines up with one on the head and with a shiny link on the chain. If they don't then you have slipped a tooth and it will have thrown your valve timing out which would account for the knocking as the valve could be hitting the piston.
If you timing chain is slack, I would strongly recommend that you check your timing marks on the cam sprocket line up. There should be a mark that lines up with one on the head and with a shiny link on the chain. If they don't then you have slipped a tooth and it will have thrown your valve timing out which would account for the knocking as the valve could be hitting the piston.