PCV Valve - How Tight? (2 Viewers)

[1Pugfan]

All nuts and bolt on 100 series are metric. But in many cases an SAE is so close you can use it. You can stick a caliper on it and measure the size.
BTW: A 12", 18," 24," etc. crescent wrench, refers to length.

I test in place, and only find ~1 in 100 bad. Most test okay. I squirt a little penetrating lubricate in for good measure. But if the engine always run on synthetic or just has a good history of frequent oil change they're always good.

Why do you want to remove it?

Right, I’m using an 18” breaker bar with 3/8 crescent socket attachment. 21mm, so sounds like 22mm is the way to go. Good to know the valves do last. $10 part I’ll just keep on hand. Thanks