Leaking valve seal
Those aren’t Viton seals, they’re Teflon.
Those can be problematic.
Measure the OD of the guide where the seal goes.
It’s likely either .531 or .500.
If you’re running dual springs, then you’ll likely require a seal with a slim profile like those.
Most heads now use steel jacketed Viton seals, which is what I’d suggest you use as well.
Those aren’t Viton seals, they’re Teflon.
Those can be problematic.
Measure the OD of the guide where the seal goes.
It’s likely either .531 or .500.
If you’re running dual springs, then you’ll likely require a seal with a slim profile like those.
Most heads now use steel jacketed Viton seals, which is what I’d suggest you use as well.