L99 Spark Plug Change - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Agent WD-40 · 04-15-2011, 12:54 PM

I'm going to change the spark plugs on my L99. I have a few questions though.

1) What is the torque spec for the spark plugs?
2) Should I use anit-seize?
3) Anything else I need to do or any other tips?

Thanks!

Scott@Bjorn3D · 04-15-2011, 02:06 PM

Whats wrong with the plugs you have, they are 100K plugs. I would not worry about changing them till 50-75K.

Snake Slayer · 04-15-2011, 05:16 PM

Quote:

Originally Posted by Agent WD-40

I'm going to change the spark plugs on my L99. I have a few questions though.

1) What is the torque spec for the spark plugs? I personally have never tor
2) Should I use anit-seize?
3) Anything else I need to do or any other tips?

Thanks!

I replaced mine last weekend while installing my Stainless Works Headers. I went with the AC-delco's 41-110. factory iridium's. Ted Jennetty tells everyone these are probably some of the best plus for N/A cars. I did use anti-seize and I always tighten my plus by hand and then snug with a 5/8 plug socket.

CC Performance · 04-15-2011, 05:20 PM

use anti seize.. ac delco 41-110, tr55IX, weaponX iridium.. etc
they are all the same even a $14 set of NGK tr55's
the more expensive plugs last longer.. proper gap is the usual issue with plugs
an engine doesnt know what plug is in it...LOL

Darth Martel · 04-15-2011, 06:02 PM

what's the proper gap on on say the NGK tr55's?

Rock-It Man · 04-15-2011, 06:23 PM

Quote:

Originally Posted by Agent WD-40

I'm going to change the spark plugs on my L99. I have a few questions though.

1) What is the torque spec for the spark plugs?
2) Should I use anit-seize?
3) Anything else I need to do or any other tips?

Thanks!

From the shop manual:

20 Newton meters (15f t lbs).

Anti-seize not mentioned.

Why are you changing the plugs???????!!!!!!!!!

mike@newera · 04-16-2011, 04:42 PM

I don't use anti seize with aluminum heads, torque spec is 15 ft lbs. In a stock L99/LS3, I use NGK TR55's, with a power adder or added compression I use NGK TR6's and gap them accordingly based on the engine combination. If you have a cam and aftermarket heads, and your still naturally aspirated but raised your compression, you can make more power on a TR6 plug than a TR55 because you can run more ignition timing. I tested this more than once and was able to get 4-5 rwhp gains doing so.

BowlingSS · 04-16-2011, 05:11 PM

I always use anti-seize when I change my plugs. I used NGK TR55's or TR6's on my LS1 engine. I was not sure they would work on the L99 engine. I still have a set of TR55's. I gap mine at .040. I have not changed mine yet on my 2011. I usually change my plugs once a year.

Good luck. Hope they are easier on the L99 than on my old LS1. It looks like you have more room.

Bill

BowlingSS · 04-16-2011, 05:15 PM

Quote:

Originally Posted by Scott@Bjorn3D

Whats wrong with the plugs you have, they are 100K plugs. I would not worry about changing them till 50-75K.

I would never wait that long to change my plugs. I change mine every year or about 15K. But I also change my oil every 3 to 5K miles.

Bill

Agent WD-40 · 04-18-2011, 12:16 PM

So two votes for anti-seize one against...

15 lb-ft. Thanks!

I'm switching back to the AC Delco 41-110 long life factory plugs from my TR6 plugs. I was also seeing some misfires (when using the scan tool) on cold startups (under 40 degrees).

JTC/C5 · 04-18-2011, 05:45 PM

dont do it... read my thread lol... no need to change AC Delco plugs... trust me

Agent WD-40 · 04-19-2011, 12:33 PM

Quote:

Originally Posted by JTC/C5

dont do it... read my thread lol... no need to change AC Delco plugs... trust me

I am switching back to the stock AC Delco plugs because of your thread!

04-15-2011, 12:54 PM	#1
Agent WD-40 Drives: 2010 Camaro SS Join Date: Oct 2010 Location: MI Posts: 601	L99 Spark Plug Change I'm going to change the spark plugs on my L99. I have a few questions though. 1) What is the torque spec for the spark plugs? 2) Should I use anit-seize? 3) Anything else I need to do or any other tips? Thanks! __________________ L99 - 440 RWHP Livernois 2c Cam & VVT/DOD Delete Roto-Fab Intake Stainless Works 1 7/8" Long Tube Headers Corsa Exhaust

04-18-2011, 12:16 PM	#10
Agent WD-40 Drives: 2010 Camaro SS Join Date: Oct 2010 Location: MI Posts: 601	So two votes for anti-seize one against... 15 lb-ft. Thanks! I'm switching back to the AC Delco 41-110 long life factory plugs from my TR6 plugs. I was also seeing some misfires (when using the scan tool) on cold startups (under 40 degrees). __________________ L99 - 440 RWHP Livernois 2c Cam & VVT/DOD Delete Roto-Fab Intake Stainless Works 1 7/8" Long Tube Headers Corsa Exhaust

04-18-2011, 05:45 PM	#11
JTC/C5 Drives: 2010 2SS L99 Join Date: Apr 2010 Location: nj Posts: 395	dont do it... read my thread lol... no need to change AC Delco plugs... trust me __________________ To Be Continued

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04-15-2011, 02:06 PM	#2
Scott@Bjorn3D Drives: Kami, 2013 2SS LS3 Luvin Join Date: Oct 2008 Location: Eufaula, Alabama Posts: 6,427	Whats wrong with the plugs you have, they are 100K plugs. I would not worry about changing them till 50-75K.

04-15-2011, 05:20 PM	#4
CC Performance Account Suspended Drives: 99 Camaro SS, 79 z28, 70 GTX Join Date: Oct 2009 Location: ST Helens, OR Posts: 1,759	use anti seize.. ac delco 41-110, tr55IX, weaponX iridium.. etc they are all the same even a $14 set of NGK tr55's the more expensive plugs last longer.. proper gap is the usual issue with plugs an engine doesnt know what plug is in it...LOL

04-15-2011, 06:02 PM	#5
Darth Martel Darth Martel Drives: Black 1SS with 20% tinted windows Join Date: May 2009 Location: Bizzaroland Posts: 1,495	what's the proper gap on on say the NGK tr55's?

04-16-2011, 04:42 PM	#7
mike@newera Drives: 2016 Camaro SS Join Date: Jan 2009 Location: Rochester, NY Posts: 529	I don't use anti seize with aluminum heads, torque spec is 15 ft lbs. In a stock L99/LS3, I use NGK TR55's, with a power adder or added compression I use NGK TR6's and gap them accordingly based on the engine combination. If you have a cam and aftermarket heads, and your still naturally aspirated but raised your compression, you can make more power on a TR6 plug than a TR55 because you can run more ignition timing. I tested this more than once and was able to get 4-5 rwhp gains doing so.

04-16-2011, 05:11 PM	#8
BowlingSS Camaro Owner Since 1987 Drives: 2011 2SS/RS L99 RJT Join Date: Jun 2006 Location: Lawrenceville, GA Posts: 2,185	I always use anti-seize when I change my plugs. I used NGK TR55's or TR6's on my LS1 engine. I was not sure they would work on the L99 engine. I still have a set of TR55's. I gap mine at .040. I have not changed mine yet on my 2011. I usually change my plugs once a year. Good luck. Hope they are easier on the L99 than on my old LS1. It looks like you have more room. Bill