Installing new spark plugs
Thread Starter
Racer
Joined: Jul 2004
Posts: 319
Likes: 13
From: Macomb Michigan
St. Jude Donor '12-'13-'14
Installing new spark plugs
I have heard of 3 way's to install plugs :
1. Put Anti Seize on the threads
2.Put engine oil on the threads
3. Put the plugs in without either
What is your selection ?
1. Put Anti Seize on the threads
2.Put engine oil on the threads
3. Put the plugs in without either
What is your selection ?
Moderator emeritus
Joined: Jun 2001
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From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
2015 C7 of the Year Finalist
anti-seize here. You have aluminum heads and the plugs are not. Spin them down to snug and then another 1/8th turn, drink a beer and do the next plug.
Elmer
Elmer
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Safety Car
Joined: Nov 2007
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From: Bay Area CA
OEM AC plugs have silver coating on threads which is anti seize. It is not recommended to apply anti seize with the OEM AC plugs.
Melting Slicks
Joined: Aug 2000
Posts: 2,327
Likes: 44
From: Sacramento CA
We went through this on the C6 Z06 forum. The Mfrs recommendations was not to use anti seize on plated (Silver) plugs. People have broken/stripped plated plugs using anti seize.
This used to be used on the old black, non plated, plugs to keep them from locking in aluminum heads.
This used to be used on the old black, non plated, plugs to keep them from locking in aluminum heads.
Melting Slicks
Joined: Dec 2006
Posts: 2,694
Likes: 106
. And use a freaking torque wrench for that job folks. Most plugs have conical seats nowadays, so the days of seating the plugs and turn them 3/4 of a turn are mostly gone. And that only applied to iron blocks, which we don't have.
Racer
Joined: Aug 2012
Posts: 310
Likes: 2
I love when know-it-alls have to insult and throw "facts" around to make them feel good about themselves. We are dealing with 11 lb ft torque, and a friction factor (k factor) of anti seize of .15 to .17. That equates to approx 1.5 lb ft. With the dab that some of us use, it's not even that much, so were talking somewhere in between 10-12 lb ft with anti-seize..... use it or not, there's no significant problems for plugs...
Team Owner
Joined: Mar 2005
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From: salem OR
Team Owner
Joined: Mar 2005
Posts: 20,933
Likes: 905
From: salem OR
3/4 turn was oil filters not plugs!
Team Owner
Joined: Mar 2005
Posts: 20,933
Likes: 905
From: salem OR
keep it from baking to the plug wire and also seals water out!
same on the coil only on the black.
Melting Slicks
Joined: Dec 2006
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Burning Brakes
Joined: Apr 2005
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From: Oakville Ontario
From the Factory Service Manual:
Tighten the spark plugs.
Tighten
For cylinder head-new: Tighten the spark plugs to 20 N·m (15 lb ft).
For cylinder head-all subsequent installations: Tighten the spark plugs to 15 N·m (11 lb ft).
No mention of anything on the threads!
Tighten the spark plugs.
Tighten
For cylinder head-new: Tighten the spark plugs to 20 N·m (15 lb ft).
For cylinder head-all subsequent installations: Tighten the spark plugs to 15 N·m (11 lb ft).
No mention of anything on the threads!
Racer
Joined: Aug 2012
Posts: 310
Likes: 2
For you "by the book" guys, GM doesn't say to use it because knuckle heads will over tighten the plugs and possible break them off, like in this bulletin from NGK: http://www.ngksparkplugs.com/pdf/TB-...1antisieze.pdf.
For those that know better, anti seize prevents galvanic corrosion: http://en.wikipedia.org/wiki/Galvanic_corrosion. Aluminum heads and steel threads is a perfect recipe for GC. Is it better to use anti seize? You'll get 50/50 answers till the cows come home.... I like to use a dab, but if you don't it will not hurt any! Either way, don't over tighten the plugs!!
For those that know better, anti seize prevents galvanic corrosion: http://en.wikipedia.org/wiki/Galvanic_corrosion. Aluminum heads and steel threads is a perfect recipe for GC. Is it better to use anti seize? You'll get 50/50 answers till the cows come home.... I like to use a dab, but if you don't it will not hurt any! Either way, don't over tighten the plugs!!