I was originally using a 1/2" by 18" long breaker bar trying to back the bolt out. Also tried a 1/2" impact, nothing. That's when I switched to the 3/8" with the 2 ft extension since that's what the pipe fit over. I'll keep working at it, maybe try some PB on the bolt, and brute force it again. No Acura dealer close, plus every time I've tried calling, all I get is "well you'll have to bring it in" or some other BS.

Any thoughts/advice on the tool to use to get the valve springs out? So far nothing I've rented/bought has worked.

Thanks