Acura Cylinder 1 Intake Valve Adjustment: Part 1

Video Transcript

"OK, to make the adjustment on the valve. This engine has four valves two intake and two exhaust for each cylinder. The intake on the intake side of the engine and exhaust on the exhaust side. The two valve use different clearances. The exhaust valve using more clearance because they have a tendency be hotter. In order to check the clearance you select the proper clearance from your feeler gage and that should be between fifty one and fifty seven, I believe, for the intake side and then you slid that between the rocker arm and the cam shaft and it should fit snugly. Without any excess free play. So we're going to slid it in there between the rocker arm and the cam shaft and then we're going to break the twelve millimeter nut free and the valve is adjusted with a slot in the center and while holding that retaining nut in place. You turn clockwise to tighten the valve clearance or counter clockwise to loosen it. We'll adjust each one go down to our snug and then the feeler gage fits snuggly. Once we've got it adjusted correctly then we'll tighten down that locking nut and then recheck it again and we'll do that on each valve. You can break them free with a twelve millimeter socket it gets you a little better torque and with an extension it you got better accessibility. But when it comes time for tightening a twelve millimeter box end wrench works best because you have to have clearance to get to the adjustment slot in the top while your holding the nut. You could use an open end box wrench but it has a tendency to slide off. Easier than a box end and see it's difficult here to get the right angle with the socket. Accessibility can be a little difficult. So once I've broken the retaining nut free then I'm going to adjust this center till it becomes snug, tight. Checking the feeler gage with each adjustment. You just want to feel good drag or tension on that like you've lightly sandwiched it between the two and what I like to do is turn down I'll back it off first counter clockwise and then I'll turn down tightening clockwise. Until it becomes snug and then I give it maybe about fifteen to twenty degrees further and I found that to work really well and then while holding the center in place. You don't want to turn the center piece while you're tightening down the retaining nut cause that changes the clearance and while your holding in place. You can go ahead and tighten down the retaining nut. After you've got it snug then you need to recheck your clearance again and to do this go ahead and pull the feeler gage all the way out. Check the free play again and then slide it back in and then make sure that you don't have any debris that might have got hung up underneath something during your adjustment and if it fits real snugly going back in. You got a good bit of drag then that means that valve is properly adjusted. So that concludes part one of adjusting valves. Please watch our next segment on part two of adjusting valve."