I just went to get my crx smogged with stock D15 engine and it didnt pass. The guy told me that HCM is high because due to bent valve and that it is misfiring is some rpm. Then it dawn on me. I overheated my engine a while back and i changed the headgasket and i only got the head resurface but i didnt get a valve job because i thought it wasnt worth paying $250 more for a D15 engine. So what would you guys suggest?

 

buy another head

 

but bent valve cause higher HCM? Thats unheard of....

 

unburnt gases flowing out the exhaust instead of being trapped in the cylinder and burning

 

WTF is HCM? I think you mean HC (hydrocarbons). And yes that would cause misfiring because that valve is putting raw fuel into your exhaust stream

 

do a leakdown test.

 

i always wonder whats the difference between a leakdown test and a compression test?

 

a leakdown test determines how well the valves and rings hold the pressure.

 

yep..and alotof ppl dont give importance to leakdown test.. ..