Micheal

You're welcome.

It was out of time, the knocking went away. Thank you again.

Yeah that's what i used and it's not sticking down through too far and the sparkplug is sticking down through the same as the other sparkplug. I'm going to check the timing and and drain the year old gas in it and put fresh gas in it. Thank you for your respond.

Hi, I'm new to this, I have a 2010 Subaru Impreza 2.5i Premium. Well it's been sitting for almost a year bc the number one cylinder side sparkplug got loose and shot out messing up the threads so bad that the spark plug wont tighten but I fix that put the head back on and now I have a knocking sound coming from that side and it never knocked before that, it's a new motor only 2years old. I'm lost and need help.