Rethread Spark Plug Hole
Pro tip on hand threading stubborn fasteners. Either where threads just don't wanna align and catch, or where it keeps trying to cross thread even by hand, or when your access is at a distance, like with plugs.
Slowly turn fastern in OPPOSITE direction, whike applying light downward pressure. You'll feel fastener rise, as it rides threads backwards, much like they do when removing, loosening them. But then you'll feel a sudden drop, as fastener falls off tip of last thread. Stop turning.
The threads are now aligned to engage. Now, the moment you start turning in tighten direction, threads will engage, and engage properly. So long as you keep fastener perfectly inline to its hole.
For something so critical if you mess up like plug threads its worth the extra 5 seconds.
Slowly turn fastern in OPPOSITE direction, whike applying light downward pressure. You'll feel fastener rise, as it rides threads backwards, much like they do when removing, loosening them. But then you'll feel a sudden drop, as fastener falls off tip of last thread. Stop turning.
The threads are now aligned to engage. Now, the moment you start turning in tighten direction, threads will engage, and engage properly. So long as you keep fastener perfectly inline to its hole.
For something so critical if you mess up like plug threads its worth the extra 5 seconds.
Pro tip on hand threading stubborn fasteners. Either where threads just don't wanna align and catch, or where it keeps trying to cross thread even by hand, or when your access is at a distance, like with plugs.
Slowly turn fastern in OPPOSITE direction, whike applying light downward pressure. You'll feel fastener rise, as it rides threads backwards, much like they do when removing, loosening them. But then you'll feel a sudden drop, as fastener falls off tip of last thread. Stop turning.
The threads are now aligned to engage. Now, the moment you start turning in tighten direction, threads will engage, and engage properly. So long as you keep fastener perfectly inline to its hole.
For something so critical if you mess up like plug threads its worth the extra 5 seconds.
Slowly turn fastern in OPPOSITE direction, whike applying light downward pressure. You'll feel fastener rise, as it rides threads backwards, much like they do when removing, loosening them. But then you'll feel a sudden drop, as fastener falls off tip of last thread. Stop turning.
The threads are now aligned to engage. Now, the moment you start turning in tighten direction, threads will engage, and engage properly. So long as you keep fastener perfectly inline to its hole.
For something so critical if you mess up like plug threads its worth the extra 5 seconds.
For hard-to-access spark plug holes, I put a piece of rubber hose over the top of the plug to help with hand-tightening. Sometimes you get a better feel than using a socket and extension to hand-tighten. Kinda like this example on
.
I use a plain spare rubber hose that fits.

I use a plain spare rubber hose that fits.

For hard-to-access spark plug holes, I put a piece of rubber hose over the top of the plug to help with hand-tightening. Sometimes you get a better feel than using a socket and extension to hand-tighten. Kinda like this example on Amazon.
I use a plain spare rubber hose that fits.

I use a plain spare rubber hose that fits.

Only issue w rubber hose, its gotta be straight. If cut off a spool or rolled up coil, piece will be rounded. So plug will turn in an orbit, not a straight line perfectly inline w hole. Making thread engagement worse than using socket plus extension.
So, make sure your hose is straight whenever trying to screw anything
So, make sure your hose is straight whenever trying to screw anything











