100% agree. The aim has got to be nothing down the bore if possible.
Technical Stripped spark plug hole thread...
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Stripped spark plug hole thread...
The original.poster hasn't stripped the thread, it's just an incase inquire
There's always people freaking out on Quora, Reddit, Google AI and so on with theories of imminent disasters, in practice it just does not happen
There's nothing to worry about
Shed loads are tapped every day and inserts fitted, especially on the Ford Triton engines,there are garages in America that do this repair every single week,
While every reasonable care should be taken to remove as much swarf as possible, it almost impossible to clear 100% it's no different to all the bit of compressed carbon grit that's formed in the combustion chamber in
This was left after the tap was greased and blasted with compressed air
Seeing as posting disaster on the internet is a popular place past time these days , there should be pictures of the damage caused every day
You will struggle to find any, In the real world it a million to 1 of anything bad will happening
That includes my nissan bluebird that blew a spark plug out and was that was fine with an insert for many years afterwards
There's always people freaking out on Quora, Reddit, Google AI and so on with theories of imminent disasters, in practice it just does not happen
There's nothing to worry about
Shed loads are tapped every day and inserts fitted, especially on the Ford Triton engines,there are garages in America that do this repair every single week,
While every reasonable care should be taken to remove as much swarf as possible, it almost impossible to clear 100% it's no different to all the bit of compressed carbon grit that's formed in the combustion chamber in
This was left after the tap was greased and blasted with compressed air
Seeing as posting disaster on the internet is a popular place past time these days , there should be pictures of the damage caused every day
You will struggle to find any, In the real world it a million to 1 of anything bad will happening
That includes my nissan bluebird that blew a spark plug out and was that was fine with an insert for many years afterwards
Absolutely, just get on with it but take all reasonable care to stop stuff falling in. After all, what else are you going to do, take the head off? definitely an alternative on a Briggs side valve lawnmower engine but otherwise?
Missed this one
Sounds very very wrong or a typo
And way too tight
A new ngk plug is just over 1/2 turn
previously crushed washer on a used plugs is much less about 12th about 30 degrees
Although a torque wrench on a cold engine is the most reliable @ 18Nm (M12) that's dry and clean no grease or oils
12Nm if greased
A genuine NGK plug has a trivalent coating to prevent seizing and should be fitted dry.
Glad we are all in agreement.
Because this
Suggested to anyone reading that you should start the engine without making any effort to remove swarf before hand.
And once you’d done that you still didn’t need to make any other effort to remove the swarf and not to worry about such things…..
Happy that this has been clarified.
It how the aluminium swarf been cleaned out by mechanics for decades with zero negative effect that I can find
And it works for me it tested by me, so it works in the real world
It's done like this every day, all over the world
I note you did a screen capture rather than just post a link to the video, I’m going to assume that’s so I and anyone else in this thread wouldn’t see the dozens and dozens of negative comments about the way he did it….
The video with comments intact is here
Just because you do something a certain way and other people do it a certain way, doesn’t make it the right way.
I have never heard of an engine builder, machine shop or any mechanic worth their salt who would say it’s ok to knowingly run an engine that has metal shavings and debris inside it.
You are literally arguing against taking basic precautions like hoovering out the shavings.
no info with the kit..I'll have to go back to e Bay. I believe those chrome inserts are meant to fit on the spark plug to clear out the thread in the head
what do the slots actually do ?
what do the slots actually do ?
Acts like the cutting edges of a "proper' thread tap. Of course, not being a proper hard tool steel a tool like this is only good for cleaning up an existing thread - it's never going to actually cut a virgin thread. So it works best where just the top 2 or 3 threads have been damaged. I've used it many times over the years with great success.
Edit. you put some grease on it and that catches any small bits of swarf dislodged by the sharp edges of the slots as you wind it in and out of the damaged thread. It restores, as much as possible, of the damaged thread and removes/reforms the rest. It works because, as we've mentioned before, most Plug Holes suffer damage to just the top 2 or 3 threads, unless of course some insensitive absolute animal has completely "done a number" on it and wound the plug well into the head. Normally the threads deeper into the hole will be undamaged so rectifying the 2 or 3 threads at the top will allow the plug to be screwed in and it will tighten down very happily in the undamaged threads deeper in.
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