Did Krillin amplify his ki to kick Nappa?

It wasn't a ki blast, but he was able to send Nappa flying if I'm remembering correctly. Was this possible at his power level read by the scouter or did he amplify his ki for this whole fight above the initial scouter reading or just for that moment? Or for the whole fight, with additional amp for that kick?

I doubt it was a normal kick. He was tanking everything from everyone at this point.

No, he didn't sent him flying, he just caught him off-guard. You must be thinking of Gohan.

Krillin did send him flying with a punch, but Nappa was completely off guard which makes it difficult to judge. But yeah they could probably amplify their physical attacks by then.