How to read plugs...

Reply Subscribe

Thread Tools

Search this Thread

07-27-2003, 03:01 PM

J Wikoff

Senior Member

Certified Car Nut

Thread Starter

Join Date: Mar 2003

Posts: 12,433

Likes: 0

Received 2 Likes on 2 Posts

How to read plugs...

How do I read spark plugs? I just put in some Autolite 5245'*. My iridiums I took out were sooty around the edge, with a definate line where the outer electrode meets the edge, then they were yellowish/pinkish on both electrodes and the ceramic at the base of the center 'trode was yellowed. A couple had some yellowish "crust" around the edges with the sootiness.

Reply Like

07-27-2003, 05:08 PM

Guest

Posts: n/a

go to this link, it has pics and decriptions of plugs and conditions/
hope this helps
http://www.hioutput.com/tech/plug.html

Reply Like

07-27-2003, 07:07 PM

karfreek

Senior Member

Posts like a Northstar

Join Date: Mar 2003

Location: Brewerton NY

Posts: 551

Likes: 0

Received 0 Likes on 0 Posts

I replaced my stock NGKs in my 99 SSEi over the weekend, they looked great. I replaced them with the AC branded NGKs. Part number 41-101 of any one needs it.

I also replaced the stock 41-921'* in my dads 96 Ultra this weekend. They also looked normal, great to see both 3800 */C'* are running great!

Jay

Reply Like

07-28-2003, 02:52 AM

J Wikoff

Senior Member

Certified Car Nut

Thread Starter

Join Date: Mar 2003

Posts: 12,433

Likes: 0

Received 2 Likes on 2 Posts

By that chart, I would have to go with normal. Good...

Reply Like

07-28-2003, 06:53 AM

Guest

Posts: n/a

with you description and not seeing the plugs, it sounded normal to me too. i hope the chart helped. i have it added to my favs.
i make sure i pull a plug after every pass just to see whats going on in there