Valve Tappet Adjustment

[rusem]

i recently had my car's valve tappets adjusted...
after ko kasi magpalit ng timing belt humina ang hatak. so it was found na delayed ang timing. timing was adjusted and ok na gumanda ang arangkada. kaso nagkaroon naman ng tope, i'm not sure kung tope nga kasi alam ko tumotope ang makina if your rpm is too low. pero yung sakin naman eh during acceleration lumalabas. above 2k to 3krpm above and pag inaapakan ko ang gas... medyo matining ang tunog, parang may kumakalansing, pino ang tunog nya. is this normal? medyo matanda na rin naman yung oto, 97 civic lxi. appreciate it if you can help me diagnose this. thanks!

[speedyfix]

either mali adjust ng tappets or pagkakabit ng belt.