A few days ago there was a discussion on valves leaking / seats, I have this problem with my Cirrus and joined in the conversation, but my problem was sort of side stepped with no suggestions. So I thought if I started a new discussion some one might have an ideal. I have just finished a Cirrus and can not get any compression as the valves are leaking. I have cut the seats to be 1/32 wide as per the drawings and ground them in by hand, but found them leaking. Recut the seats and ground the valves to a 1 deg shallower than the seats in my lathe using collets to ensure everything was true. I then blued the seats turned the valve by hand again and got a nice clear seat, but they still leaks. I made the lapping tool as described in SIC mag again no joy. Each time I try another ideal I am aware of the seats getting wider, from what you say the seats should be narrow, is there any remedy to get these valves and seats to seal. As there is about a months worth of work in this cylinder head and don't want to scrap it if it can be helped. This is my sixth I/C engine using the same methods as before and they worked but this one has beaten me.