teddan Posted October 13, 2012 Share Posted October 13, 2012 I have started lapping the valves, but i can't get a perfect surface. There are some very small dark spots on the valves contact surface. I have done a leakage test and it was good---- no leakage Should I grind the valves even more? Link to comment Share on other sites More sharing options...
Rob_Mitchell Posted October 13, 2012 Share Posted October 13, 2012 Usually best to get rid of the little spots, well i like to anyway. What grade grounding in compound are you using? i usually use a course grade then use a fine grade. If not leaking then dont worry too much... your decision Link to comment Share on other sites More sharing options...
teddan Posted October 13, 2012 Author Share Posted October 13, 2012 I have both fine and course compound, no matter which one I use, I still have some small spots... quite annoying to don't have it perfect Link to comment Share on other sites More sharing options...
Benjy Posted October 13, 2012 Share Posted October 13, 2012 Lap them faster. Keep going between the two pastes. Or put the top of the valve in a drill chuck and lap it in that way. Obviously not flat out but it's easier to get the speed than using one of those stupid suckers on a stick! Link to comment Share on other sites More sharing options...
Rob_Mitchell Posted October 13, 2012 Share Posted October 13, 2012 Lap them faster. Keep going between the two pastes. Or put the top of the valve in a drill chuck and lap it in that way. Obviously not flat out but it's easier to get the speed than using one of those stupid suckers on a stick! They are genius lol. but yeah just grind faster! Link to comment Share on other sites More sharing options...
Benjy Posted October 13, 2012 Share Posted October 13, 2012 They are genius lol. but yeah just grind faster! Mate i get about 2 seconds in and drop them, or they roll out of my hand, they're just shite! Good idea, but shite! Lol Link to comment Share on other sites More sharing options...
snake Posted October 13, 2012 Share Posted October 13, 2012 Dont forget to check the valve guides are not worn out before you spend a lot of time lapping the valves in . Link to comment Share on other sites More sharing options...
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