I have a 2009 Dodge Grand Caravan. 3.3 6L.
The middle spark plug (#4, fairly easy to get at with 'some' tools') is ceased and the nut seems to be stripped.
I have read that you can put a torch to it to unseize it.
I've tried penetration oil for 3 or 4 days now, still no movement.
Is it safe to use a torch on it?
Thank you in advance.

 

Have you tried lightly tapping an undersized socket onto it? sometimes you can get a tighter grip that way. I used to use this method to remove rounded wheel nuts. Also, being that the head is aluminum, I would be careful with the flame, but I would be willing to try, but that's just me.

 

Wasn't sure if heads were aluminum. Now I know. A smaller socket??? I would have to break top half off of stuck plug to fit over it. What if I can't get it out? I use Caravan as a Taxi. Need it for work.
Tks

 

can you visually see the plug to see if it's rounded? Sometimes, tapping the socket/extension with a small hammer will help the socket seat better on the nut/plug. If you need it for work, then I wouldn't break it unless I felt that I absolutely had to.

 

Yes I can see it and it is fairly rounded now. It takes a 5/8" or 16mm. I am looking for a deep 15mm or 9/16" socket but unless they are specific for 'spark plugs' I'm not sure if they will fit length wise. I will let you know what happens over next few days. Tks again for your suggestions.

 

Most deep well sockets will fit spark plugs without issue. Just don’t go cheap - get an impact grade.

If you are still able to run the engine, you can avoid the torch by running it to operating temperature and then try breaking it loose. Just be cautious - if it starts to come loose but is difficult to turn, spray lube on it and then slowly work it back and forth to avoid breaking it off flush. It’s possible a previous owner or tech cross threaded that plug.

 

hey *****, just got the plug out. Tapped 15mm socket on it. which as far as I can tell is 1/8" smaller than 5/8". The first 1/2 turn was tough but after that, smooth sailing. Thanks for tips.

 

GumbyRT, just got the plug out. Tapped 15mm socket on it. which as far as I can tell is 1/8" smaller than 5/8". The first 1/2 turn was tough but after that, smooth sailing. Thanks for your help.

 

Cha Ching! Awsome! Now, if you need help getting the plug out of the socket, lay the socket flat on the ground, strike it on its side with a hammer over and over again, rotating it as you go, until the plug falls out.