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snapped spark plug 

 

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 Post subject: snapped spark plug
Posted: Tue May 27, 2008 1:57 am 
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WTF would cause a plug to be so f**king tight as to the point of snapping on removal?(i swear it was the in law & not me)
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Posted: Tue May 27, 2008 8:48 am 
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Lack of anti seize when it was installed. Seek professional help in removing it as you don't want to fill the cylinder up with broken insulator.

 

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Posted: Tue May 27, 2008 12:39 pm 
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or improper use of spark plug tool, if the rubber grommet inside the tool is missing the plugs can snap

 

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Posted: Tue May 27, 2008 6:32 pm 
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i always take out hot. i did once cold and rounded of edges so have always changed plugs on warm/hot engine
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Posted: Tue May 27, 2008 6:51 pm 
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I recently had this happen on my drift cars engine. It all ended in tears as after the top of it snapped off, i decided to call the meet a day and load it on the trailer.

While doing so, the centre of the plug dropped into the engine and f****d it. Expensive exercise.

Also, i tried getting it out hot, and thats when it snapped.
Professional help as said is the best, otherwise its a head off job.

ALWAYS use anti seize!!!.

Andrew.

 

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Posted: Tue May 27, 2008 9:12 pm 
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I have never used anti-sieze. where do i get some? how much? and how do i use it? because i really dont want that to happen
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Posted: Tue May 27, 2008 9:19 pm 
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I've changed plenty of spark plugs on friends and families cars, and they have never snapped and I never used anti-sieze. Maybe people are overtightening them.

 

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Posted: Tue May 27, 2008 9:28 pm 
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same here - never used or even heard of anti seize!!
my moto with plugs is never tighten them more than what you could do with a socket on the end of a screwdriver.

 

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Posted: Tue May 27, 2008 9:38 pm 
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Punnisher_42 wrote:
same here - never used or even heard of anti seize!!
my moto with plugs is never tighten them more than what you could do with a socket on the end of a screwdriver.
well im glad somones with me
i was about to run out and take my spark plugs out
lol
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Posted: Wed May 28, 2008 12:08 am 
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Why would you need to make them so tight anyway, its a spark plug not the sydney harbour bridge.

 

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Posted: Wed May 28, 2008 7:27 pm 
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I never over tighten mine, yet it happened.

Andrew.

 

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Posted: Wed May 28, 2008 7:57 pm 
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only ever happened to me when the head gasket went car was only suited to wrecking then, and I didn't do it was the mechanic, if i knew what i know now would have been a different story, that said i only do them up to hand tightness, think in my workshop is has a certain tightness for them which I've done in the past always been good. check to see to that the threads on them are good and you don't cross thread them as you put them in.

 

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Posted: Wed May 28, 2008 10:18 pm 
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From the official BA service manual.

Anti-Seize Compound
Ford Spec.
General SAM-1C-9107A or SAM-1C-9107A
Spark plug threads ESE-M1244-A

Torque 10Nm

Interesting that the spark plug replacement procedure does not mention putting anti seize on them...

 

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Posted: Wed May 28, 2008 11:07 pm 
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fnp wrote:
Why would you need to make them so tight anyway, its a spark plug not the sydney harbour bridge.


Hehe, the sydney harbour bridge is riveted and not bolted!

I have caught my brother out overtightening them, He thought because it had to seal that a bit more wouldnt hurt....

Anti seize is good, but not necessary if you dont overtightend them.

 

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