01-04-13, 05:12 PM
Further thoughts on the valves. The exhaust valves on the 600 are only 21mm dia so the sucker on the stick needs to be no bigger than about 19mm dia. Plenty on e-bay but any half decent car accessary shop will have the tool and paste for less than the postage cost on e-bay. Also only use the fine paste and don't over do it, just enough to see a smooth even surface. Maybe 10-30 seconds rather than minutes of lapping. In theory it can close up the valve clearance, but you shouldn't be removing a measurable amount of metal anyway.
There is an opinion that it's best to leave them alone if they seal and look o.k., but I faviour a quick fine lapping if the heads off.
There is an opinion that it's best to leave them alone if they seal and look o.k., but I faviour a quick fine lapping if the heads off.