Spark plug stuck??
Road Warrior
Joined: Jun 2017
Posts: 1,705
Likes: 1,017
From: Lawrenceville Ga.
A little expensive but you will use the rest of your life. Maybe even split it with some friends. A little goes a long way.
Note: The non metal anti seize was brought to our attention last year from member and Mod cggorman...Thank You
Last edited by Blue Bob; Oct 15, 2020 at 11:56 AM.
Stellar HDF Member
Joined: Oct 2007
Posts: 2,806
Likes: 1,754
From: New Bern NC
I wouldn't use any type of anti-seize on spark plugs but if you do use it you'll want to reduce the torque value when you install them. The anti-seize will act as a lubricant and can increase torque by as much as 20%. Modern plugs have a plating that acts as an anti-seize. Almost all spark plug manufacturers warn against the use of anti-seize, it's an old habit that just won't die.
https://ngksparkplugs.com/en/resourc...hell%20stretch.
https://ngksparkplugs.com/en/resourc...hell%20stretch.
Road Master
Joined: Nov 2010
Posts: 1,115
Likes: 69
From: Bay Area, NorCal
Maybe I'm just one of the lucky ones: have always installed plugs "dry" without lube or anti-seize on first my EVO-80" and now my TC-96" and never had a problem with galling. I've been tempted because of horror stories like the OP's, but never got around to using any goop on my plugs. FWIW, I only use Screamin' Eagle plugs. OP - good luck on getting your plug holes fixed.
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Seasoned HDF Member
Joined: May 2008
Posts: 21,029
Likes: 12,550
From: South Carolina
The threads on the plug in the OP`s picture look like they have no coating, I would have used anti seize on them for sure.
Road Warrior
Joined: Jun 2017
Posts: 1,705
Likes: 1,017
From: Lawrenceville Ga.
Honda and Autolite have certain applications where they do recommend anti seize and that is in current automobiles.
Either way I use a very small amount on my plugs, and do not get it anywhere near the outer electrode and of coarse reduce torque value.
Either way I use a very small amount on my plugs, and do not get it anywhere near the outer electrode and of coarse reduce torque value.
Seasoned HDF Member
Joined: May 2008
Posts: 21,029
Likes: 12,550
From: South Carolina
Some spark plugs will thread in too far when threads are lubricated and damage the threads in the cylinder head (if you see a Crown Victoria or Grand Marquis with a dimple in the hood, you know the guy used anti seize on the spark plug threads
).Some Shovelhead manuals call for motor oil.
TC manual calls for anti seize.
M8 service manual calls for spark threads to be clean and dry.
There is no standard answer other than to follow the service manual.
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HDF Community Team
Joined: Aug 2018
Posts: 3,013
Likes: 1,190
From: New Hampsha
I've done dozens (probably more than 100) helicoils over the years. Never once had a problem. Besides,any chips a careless mechanic might leave will be blown out the exhaust port first time the engine rotates.
If the FSM calls for engine oil then anti-seize won't appreciably affect the torque.
If the FSM calls for engine oil then anti-seize won't appreciably affect the torque.