[A930Rocket]

I checked the valve clearance and it was good. Then I took a brass drift and brass hammer to tap on the valve. I wasn't sure how hard to tap on it, but tapped on it 10-20 times. Checking with a leakdown after the fact showed it was still coming out the exhaust valve. Didn't think to air it up and tap at the same time. I'll try that next time.

How hard do I tap it?

Plan on taking it for a good drive tomorrow with the injector cleaner, then back home to check it again. Maybe rap on the valve again and retest with air.