31-03-2018, 07:51 AM
Ian is on the money there, looks to me as though the seat has been narrowed from above.
The width of the seat in the block looks good, as does the valve .Although the recession is not ideal, it will not affect performance significantly. I have seen a number of engines like this.
I would regrind the valves, and reassemble.Looking at the valves I would’t renew them, you could get them refaced at your local engine reconditioners £2 - 3 each if you are really bothered.
Beware of cheap diy valve seat cutters, they will spoil what you have.You would need something like a Neway seat cutter, they are excellent, but expensive £250ish for 1 cutter, pilot, and handle.Bear in mind a recut will lower the valves even more.
Hope this helps and you get your Seven going shortly
The width of the seat in the block looks good, as does the valve .Although the recession is not ideal, it will not affect performance significantly. I have seen a number of engines like this.
I would regrind the valves, and reassemble.Looking at the valves I would’t renew them, you could get them refaced at your local engine reconditioners £2 - 3 each if you are really bothered.
Beware of cheap diy valve seat cutters, they will spoil what you have.You would need something like a Neway seat cutter, they are excellent, but expensive £250ish for 1 cutter, pilot, and handle.Bear in mind a recut will lower the valves even more.
Hope this helps and you get your Seven going shortly