Nutz About Bolts Prius Maintenance Videos

nice, mines a 2012 too.

Got plenty more to go, cylinder one spark plugs was tough to remove, I thought it was strip, used an impact wrench to remove it, then the spark plug insulation cracked and stuck in the cylinder. Now I can’t get a socket in there lol. Gotta pull the head out before I can remove the spark plugs… oh well

 

Because carbon is built up on it...
NEVER use power tools to install or remove spark plugs!

The correct way to remove them is to loosen until it starts to jam, then tighten 1/4-1/2 turn,
then loosen again, etc. It takes a while, but you don't damage the spark plug so you can't remove it,
and you don't damage the spark plug hole.
Somethings you just have to be patient with no matter how much of a hurry you are in.

 

Never happened to me before, the only reason it happened is because of the cylinder 1 misfire and it’s causing the oil to get into the spark plug threads so it’s causing a binding. The other 3 spark plugs I just loosen and use the impact wrench without issue. I should’ve known and be patient with the cylinder 1.

I also, forgot how long the spark plug threads are on the Prius spark plugs, I keep thinking it’s the same length as the Honda spark plugs

 

If you play with fire, you're going to get burnt!

I learned that the hard way also, in the 80's.

When you get the head off, wire brush around the spark plug, and use rust penetrent on it
and let it soak. It should loosen up the carbon...