I have a 2008 GT/CS built in DEC. 2007 . Are you saying I have the newer design 1 piece plug ?! And if so , has anybody out there have pics of what they look like? Also , what does the "A_A" mentioned earlier mean... you have the NEW design, or the OLD crappy design ?

 

AA on the cam cover means old style heads, two piece plugs, AB means new style heads, one piece plugs. Looks like cars built around 11/07 and newer have the new heads\plugs.

 

I'm getting a set of Autolite HT1 plugs for the car. I have just under 25,500 miles, and will be changing out the old crappy 2-piece plugs for these 1 piece jobbies. I'll have my dad with me (he's going to be 71 and is a 57+ year auto mechanic) just in case I need a helping hand. Never took plugs out before, but will be following the TSB to a T!

 

Autolite HT1 are two piece just like the Ford Motorcraft plugs. I installed the Autolite HT1's last year.

 

Are you sure? The previous page, Tom installed several sets of Autolites in his car and they were 1-piece plugs.

 

I just went out to check to see which heads I had . I was relieved to find out that the left cam cover lable had a 8S-837-AB on it ! I'm guessing the " A B " means the new 1 piece plug...? I won't get too excited until I hear someone say I found the right label .

 

NJ3 is right! When I made that previous post, I meant to say that I've had several sets of the Autolites TWO PIECE plugs over the years without problems..... Sorry for any confusion!

 

Thats the label, Happy-Happy-Joy-Joy!

 

Hell yeah, by the time you shell out the $700+ for the techs to use to the tool, or the tool itself, you bought at least one head. Plus, once the heads are out, you can easily remove the plugs and then sell the stock heads as a core.

 

COOL !!!!

 

Here is the autolites after 39000 miles. The one on the right broke off in the head. I had to buy a puller to get it out. I went back with one piece Brisk Racing plugs and love them. Tool cost me $110. off the Mac truck and I got the plugs from Steeda for $16.95 a plug.

 

holy cr**! my plugs had over 50k on them and had carbon on them black. yours look rusty.
every one squeaked every time i turned them, so I took it nice and slow. but I put autolight ht0's back in and used anti seize on the threads and the bottom. has anyone had any probs with 2 piece plugs after they were anti seized?

 

A couple of notes here. You aren't supposed to put anti-seize on the threads, only the "barrel" below the threads. Also, keep the anti-seize OFF the firing end, if you get it on the firing points, the plug will misfire. The only thing about the Brisk plugs is they have a relatively short service life because they are not platinum tipped. The Brisk people told me this. They are primarily a racing plug.

 

True they dont last as long but I was going for performance. They had the correct heat range for sc. Champion makes a good one piece plug for non sc cars that is a good stock replacement. I have heard of people using the champions in sc cars with the result being good and bad. I was told if I take the Brisk out every 25000 miles and clean them they will last longer. I love working on my car so this is not a problem for me.

 

yea I read the T.S.B. but just to be safe i did the threds, and the "barrel" I'll retorque them in about a week. when I do the C.O.P. upgrade.

 

No anti-seize on the threads? I thought you ALWAYS used anti-seize on plugs when they went into aluminum or the dissimilar metals will cause galvanic corrosion that will try to weld them together.

 

You don't want them backing out on you. That could could many problems. The carbon buildup does not occur on the threads, but just below them.

 

Fair enough!

 

I am running the Autolite HT0's in my car...it's what all the shops around my area recommended since my car has a S/C on it.

 

I changed my plugs out about 6 months and replaced with Brisk. Got 'em from Steeda. Car runs great, no driveability issues and no anxiety over getting them out next time since they are a
1-piece design.

Highly recommend