OK, i see that someone has cleaned there HLA and he said that, it caused the engine to sound smoother and the tap stop or something. Im interested in doing this and because i work at a mechanic shop i can probaly have some helpful hands But im not a mechanic cuz im 17 lol i just help out a little to make some cash. Anywho i have the g4eb 1.5L sohc 12valve motor but i do not really no what to do and how to do this and would like to know if someone coukld walk me through step by step so i can print it off and give it to my boss to help me out. Cuz my motor taps bad with only 85k and full synthetic in it, plus its very cold up here for example it took me 2 hours to get my damn door open cuz it froze shut... help would be appreciated!!!