Spark plug question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

KEL · 09-06-2010, 04:40 PM

I have a 2008 4.8 with 30,000.
Bought it with 11,000.
Pulled the plugs today.
Is the "needle point" really how theplugs look ?
Tough to see, but the electrode spot is a small white dot.

**Boog** · 09-06-2010, 06:37 PM

Yep that's it.

clinebarger · 09-06-2010, 07:42 PM

What was the reason for removing the plugs? Do you have a drivability problem?

spudz · 09-06-2010, 08:24 PM

only put back in the factory ac delco plugs... hell put those back in. they are still good to go.

clinebarger · 09-06-2010, 11:33 PM

Quote:

Originally Posted by spudz

only put back in the factory ac delco plugs... hell put those back in. they are still good to go.

AC-Delco is not the only quality spark plug manufacturer! Half of the OEM plugs in GM trucks are made by NGK. So why whouldnt a platinum/iridium spark plug from NGK do same job & still last 100K?

AC-Delco is to busy making replacment 'high profit" spark plugs for our trucks than keeping up with demand on the production line.

Dont believe all the "dealer rhetoric" you have been taught.

spudz · 09-07-2010, 12:22 AM

Quote:

Originally Posted by clinebarger

AC-Delco is not the only quality spark plug manufacturer! Half of the OEM plugs in GM trucks are made by NGK. So why whouldnt a platinum/iridium spark plug from NGK do same job & still last 100K?

AC-Delco is to busy making replacment 'high profit" spark plugs for our trucks than keeping up with demand on the production line.

Dont believe all the "dealer rhetoric" you have been taught.

whats with the attitude? I didnt say there were the only good maker, but if they wernt the best plug to put in it, gm wouldnt be using them. I am a firm believer in using OEM parts... Motorcraft for ford, delco for GM. my 2000 trans am made less hp with ngk plugs then the stock delcos. on the dyno. that damn good proof right there... there was someone else on the forum had same results with his lsx car. I will always spew dealer rhetoric......because I work at a chevy dealer.

**truckdude239** · 09-07-2010, 07:13 AM

ac-delco platinum/iridium is all i install in these trucks i've installed other brand and have had customers coming back. i can get ac-delco platinums for about 2.99 a piece

**truckdude239** · 09-07-2010, 07:14 AM

btw i'd put a stad of anti seige on those before i put them back in

KEL · 09-07-2010, 07:54 AM

Quote:

Originally Posted by clinebarger

What was the reason for removing the plugs? Do you have a drivability problem?

yes
I had a skip and some slight hesitation.
Swapped out the plugs and it appears to be gone.
Thanks for all the input.

clinebarger · 09-07-2010, 11:44 AM

Quote:

Originally Posted by spudz

whats with the attitude? I didnt say there were the only good maker, but if they wernt the best plug to put in it, gm wouldnt be using them. I am a firm believer in using OEM parts... Motorcraft for ford, delco for GM. my 2000 trans am made less hp with ngk plugs then the stock delcos. on the dyno. that damn good proof right there... there was someone else on the forum had same results with his lsx car. I will always spew dealer rhetoric......because I work at a chevy dealer.

GM contracts NGK to build alot of the spark plugs put in the 4.8,5.3,6.0.

AC P/N 25171803

NGK P/N 12567759

These are both OEM part numbers.

How much HP did you lose with the NGKs?

**Boog** · 09-07-2010, 12:24 PM

Quote:

Originally Posted by truckdude239

ac-delco platinum/iridium is all i install in these trucks i've installed other brand and have had customers coming back. i can get ac-delco platinums for about 2.99 a piece

Dang David. I just recently bought some for my 97 at O'Riellys for $6.50 each, listed for $11+. That's almost twice your price. Yes they are designed to last 100,000 miles but I got sick at that price.
Too many people have said the same thing about running a different plug than AC and having issues for me to consider running anything else.

09-06-2010, 04:40 PM	#1
KEL 72 GMC Join Date: Feb 2008 Location: Wells, Maine Posts: 534	Spark plug question I have a 2008 4.8 with 30,000. Bought it with 11,000. Pulled the plugs today. Is the "needle point" really how theplugs look ? Tough to see, but the electrode spot is a small white dot. Attached Images

09-06-2010, 06:37 PM	#2
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 12,960	Re: Spark plug question Yep that's it. __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross

09-06-2010, 07:42 PM	#3
clinebarger Senior Member Join Date: May 2009 Location: Fort Worth, TX Posts: 6,370	Re: Spark plug question What was the reason for removing the plugs? Do you have a drivability problem?

09-06-2010, 08:24 PM	#4
spudz Registered User Join Date: Oct 2005 Location: Branchville SC Posts: 1,647	Re: Spark plug question only put back in the factory ac delco plugs... hell put those back in. they are still good to go. __________________ 2004 z71, 96 z71 on 38s, 88 Chevy k5 blazer, 4in lift. 84 swb project, 82 SWB project , 84 chevy 4x4 lwb project, 88 Jimmy beater/highschool ride. 79 c30. 99 tahoe 4x4 project. and a bunch of parts trucks..

09-07-2010, 07:13 AM	#7
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,217	Re: Spark plug question ac-delco platinum/iridium is all i install in these trucks i've installed other brand and have had customers coming back. i can get ac-delco platinums for about 2.99 a piece __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

09-07-2010, 07:14 AM	#8
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,217	Re: Spark plug question btw i'd put a stad of anti seige on those before i put them back in __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube



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