I take it you didn't use new hoses when the new motor went in??
I had a hose go back there. Pulled the plenum off and replaced these;
21307-05U02, 14055-05U11, 21307-05U04, 14055-05U01, 14055-05U02
Water/heater: 92410-05U00, 92402-05U00, 92401-05U00
BTW - i met you at the suspension tech day at Heasmans ages ago