[lndwarrior]

I honestly know squat about aircraft engines, though I'm just starting to learn.

I have a severely stripped spark plug hole in my Lycoming engine. It is stripped so bad the plug literally falls out of the hole.

So what's the proper fix - a new cylinder? Or possibly a helicoil?

Fortunately this was a spare engine that was pretty much donated to me. I was getting ready to try and sell it when I discovered the problem.

Tia,
Gary

 

[BobTurner]

The engines come with helicoils. Sounds like yours came out? Make sure it didn't fall into the cylinder. Replace it. Make sure no sharp ends protrude into the cylinder.

 

[Scott Hersha]

Install new helicoil. A little tricky if you haven't done it before. Enlist the help of a local A&P who has done this before is my recommendation - and what I've done. Remove both spark plugs, move the piston to TDC. Use air pressure/vacuum to remove any debris that gets inside the cylinder after the new one is installed, and if you have a boroscope to make sure the cylinder is clean that would help. Took my A&P about 30 minutes start to finish.

 

[Marklew]

Hi Gary,
I am in northern CA and looking for an engine. What do you have? you can PM if you wish.
Thanks,
Mark