stripped out spark plug hole

**cocacola** · 05-21-2019, 07:47 AM

What is the best way to fix this...without removing head.
I fixed 2 holes, but one did not last.
Used something like these
link

I think I used the wrong loctite as it unthreaded just a mile away from ramp

thinking of using these instead
link

**rock** · 05-21-2019, 11:07 AM

The inserts in the bottom link seem to work fine in my truck. Just did one about a week ago. If you can find them it is best to use aluminum inserts for proper heat transfer.

Rock

**Jay Smith** · 05-21-2019, 05:35 PM

I use time serts for ALL thread repairs , works great ...Oh and you must pull the head !!

Jay

**flabum1017** · 05-21-2019, 08:59 PM

The biggest concern is not getting anything into the cylinder..... you don't want any abraisives in there. Pulling the head is your best bet IMHO

**rock** · 05-22-2019, 07:49 AM

Pulling head is definitely the best way but if you don't then pack as much grease around the tap as you can. On my Ford truck we used a special two stepped tap that eliminated drilling. Coated insert with high heat Loctite, staked it in place and she works fine.

Rock

**SS Minnow** · 05-22-2019, 08:39 AM

Another vote for pull the head. Not sure what motor this is on, but if it were mine the head would come off.

**Radiant** · 05-22-2019, 12:06 PM

I had an opti where the first few threads were a little gummed up. I could not get the spark plug to go in. A reverse tap worked perfectly. Not sure how stripped yours is.

**HStream1** · 05-23-2019, 07:07 AM

http://www.timesert.com/html/sparkplug.html And definitely remove the head. its just good insurance. Its to late when some metal gets in the cylinder and causes damage.

**Capt.Insane-o** · 05-24-2019, 05:17 AM

I have to do a couple holes on an old 100 inline today. With those you ttake the transfer port cover off and blow whatever chips that may fall in the cylinder out with an air compressor.