cylinder head spark plug hole threads stripped in LB model 10323

[blowerhead]

After 19 seasons, The threads in the spark plug hole are stripped. Other than getting another head, any suggestions?
Thanks

 

[Lawnboy77]

A Heli-coil insert repair kit is what you want. The local hardware store should have them in stock. If you don’t mind spending a little extra money a machine shop can do it all for you.

 

[bertsmobile1]

Heli coils are goos anywhere the hole does not need to be pressure tight as the wire insert is a poor fit in the thread.
For spark plugs a similar device called a Time scert is a much better way to go.
Similar idea except the insert is both solid and the correct shape for the plug.
No matter which way you go from now on it will be important to put a little nickel ( silver colour ) anti sieze on the plug to prevent the insert winding out when you remove the plug, particularly if the engine is hot.

 

[blowerhead]

Thanks Much

 

[blowerhead]

Heli coils are goos anywhere the hole does not need to be pressure tight as the wire insert is a poor fit in the thread.
For spark plugs a similar device called a Time scert is a much better way to go.
Similar idea except the insert is both solid and the correct shape for the plug.
No matter which way you go from now on it will be important to put a little nickel ( silver colour ) anti sieze on the plug to prevent the insert winding out when you remove the plug, particularly if the engine is hot.

Thanks, What is a "Time scert", cannot find when I google it.

 

[bertsmobile1]

these things http://www.timesert.com/
Usually you get them from an ENGINEERING supply shop & not an auto parts store.
Most engine reconditioners will have them.
We have a mobile bloke who comes around & does them .
Down here he charges $ 50 call out + $ 15 for each plug.
The gear is a lot more expensive then helicols cause they are better.

Just like Helicoil, there are a lot of generic brands out there a lot cheaper.

 

[Lawnboy77]

Heli-coil is a brand name, they are the biggest in the industry and they make spark plug inserts as well as any other insert you can imagine.

 

[reynoldston]

g.
No matter which way you go from now on it will be important to put a little nickel ( silver colour ) anti sieze on the plug to prevent the insert winding out when you remove the plug, particularly if the engine is hot.

Very bad idea anti sieze, don't cross thread the new plug and use a torque wrench if you have one when you install. You should be able to install the new plug with just your fingers and then just tighten to specs. There is a reason the new plug striped out the head. I would price out a used or new head before buying a Heli coil set it might just be cheaper. You will need a complete kit for just one plug, not worth the cost.

 

[jp1961]

Hello,

A new cylinder head is 36.96.

Check Craigslist for a used one.

Regards

Jeff

 

[blowerhead]

Very bad idea anti sieze, don't cross thread the new plug and use a torque wrench if you have one when you install. You should be able to install the new plug with just your fingers and then just tighten to specs. There is a reason the new plug striped out the head. I would price out a used or new head before buying a Heli coil set it might just be cheaper. You will need a complete kit for just one plug, not worth the cost.

Thanks for your advice. seems a new/used head is about the same price as a Heli-coil set