GM Spark Plugs
Thread Starter
Burning Brakes
Joined: Aug 2003
Posts: 1,070
Likes: 9
From: MARRIOTTSVILLE MD
GM Spark Plugs
I have a 2000 LS1 with the stock AC plugs AC 41-952
but I have a GM parts book and its lists a different
plug the AC 41-974 for my year. What is the correct
AC plug number and is this a problem ?
Thanks >>>>> Mike
anyone who wants a free copy of the 97-01 GM vette
parts manual in PDF format just shoot me an email
I would be more then happy to send you one but
remember its big around 50MB
but I have a GM parts book and its lists a different
plug the AC 41-974 for my year. What is the correct
AC plug number and is this a problem ?
Thanks >>>>> Mike
anyone who wants a free copy of the 97-01 GM vette
parts manual in PDF format just shoot me an email
I would be more then happy to send you one but
remember its big around 50MB
Safety Car
Joined: Nov 2000
Posts: 4,419
Likes: 6
From: Arroyo Grande CA
Checking the AC-Delco site, they do not list a 41-974 or a 41-952. They do list the 41-985 as the now, proper plug for C5. It's an Iridium plug with a .040" gap. They state not to deviate the plug gap.
Safety Car
Joined: Sep 2001
Posts: 4,411
Likes: 1
From: Wilmington NC
Originally Posted by 2KFRC5
Checking the AC-Delco site, they do not list a 41-974 or a 41-952. They do list the 41-985 as the now, proper plug for C5. It's an Iridium plug with a .040" gap. They state not to deviate the plug gap.
Delco was using a horribly designed copper plug that had a platinum insert on the negative electrode which would fall off with great regularity. They have since gone with an iridium design and this a retro for all LS1/LS6 engines.
The correct part number is now 41-985.
http://www.acdelco.com/html/catalog/index.htm
Last edited by Richin Chicago; Aug 19, 2004 at 05:38 AM.
Thread Starter
Burning Brakes
Joined: Aug 2003
Posts: 1,070
Likes: 9
From: MARRIOTTSVILLE MD
GM plugs
Originally Posted by Richin Chicago
Delco was using a horribly designed copper plug that had a platinum insert on the negative electrode which would fall off with great regularity. They have since gone with an iridium design and this a retro for all LS1/LS6 engines.
The correct part number is now 41-985.
http://www.acdelco.com/html/catalog/index.htm
