spark plug welding to head
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Road Captain
Joined: Dec 2009
Posts: 550
Likes: 8
From: Syracuse, NY
spark plug welding to head
looking in the manual it says that the spark plugs are to be inspected at the 1000 service, which i had Harley perform. If Harley inspected them per manual, and re-install with anti-seize (per manual) could this have happened in 2500 miles?
Road Master
Joined: Apr 2009
Posts: 750
Likes: 3
From: 3rd Rock
It's called "gauling" not sure how it happens...( something to do with steel (the plug), and aluminium, (the head), and heat. But I do know the cure/prevention. Put some Antisieze compound on the plug threads of the plug before installing.
Hope this helps
Merry Christmas...Best wishes...Tim(HT)
Sniff....sniff......do I smell a Troll?
Hope this helps
Merry Christmas...Best wishes...Tim(HT)
Sniff....sniff......do I smell a Troll?
Last edited by Harley Tim; Dec 17, 2011 at 09:41 AM. Reason: Troll?
Road Master
Joined: Jan 2011
Posts: 893
Likes: 0
From: Knob Noster, MO
No that shouldn't have happened with antiseize on the threads, so it is obvious that they didn't put any on. But why the double thread, you already have a topic started on this exact same thing? You even asked the same question in that thread....
https://www.hdforums.com/forum/dyna-...es-this-2.html
https://www.hdforums.com/forum/dyna-...es-this-2.html
Last edited by Gringoloco13; Dec 17, 2011 at 10:20 AM.
Road Warrior
Joined: Jul 2007
Posts: 1,707
Likes: 4
From: Newtown, PA
Galling (Gaul was what France was called during Roman times) occurs when two dissimilar metals (e.g. steel and aluminum) have a chemical reaction and bond together. Looking at the photo of your spark plug, I'd say that (a) it was never replaced - look at the rust on it, and (b) no Permatex anti-sieze lubricant was used. At less than $5 a plug, they should be replaced at each service interval.
Extreme HDF Member
Joined: Jun 2011
Posts: 10,216
Likes: 224
From: Glendale AZ
Yet another reason to stay the hell away from a dealership...no one can afford to be in the dark when it comes to the maintenance requirements of these or any bike manufacturer. Just because you pay for something doesn't mean your going to get it....does it.
Road Warrior
Joined: Dec 2010
Posts: 1,629
Likes: 46
From: East Hartford, CT
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Road Master
Joined: Apr 2009
Posts: 750
Likes: 3
From: 3rd Rock
[quote=rdondes;9154277]Galling (Gaul was what France was called during Roman times) occurs when two dissimilar metals
Shusssh.......Don't tell the spelling police!
Oh...you mean the Anode-Cathode thing
Shusssh.......Don't tell the spelling police!
Oh...you mean the Anode-Cathode thing
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Seasoned HDF Member
Joined: Mar 2010
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From: Honah Lee
Actually the anti-seize contributed to it with someone who over tightened them. When you bottom a new plug with a new crush washer gasket you go about 1/4 turn or so. When you pull a plug (for the life of me there really would be no reason at 1000 miles unless it was missing) you return to to the bottom hand tight and bump it an 1/8 or so. With the grease it remarkable easy to turn it 1/2 turn or more which shears the threads off in the head. If that is aluminum in the threads next plug change you will need heli-coil inserts. I have seen Harley plugs look like that on mine at 2500 miles as far as rust is concerned on the out side if you have run in rain a lot. I run NKG now and the coating holds ups better. The plugs on the right were ran in some extremely hot weather and thunderstorms on a long trip. They actually have less miles the the ones on the left that have 10K and really are still fine. Pulled them when my tac was acting up. Notice that the washer is not crushed flat. A sign of overtighten.
Last edited by Jackie Paper; Sep 14, 2018 at 11:24 AM.
