Help please, thread gone on 088

[Stubby]

Has anyone else had experience with 'Time Sert'? Handy that you do not need to remove the head, save a lot of money on labour.

 

You don't have to remove the head with a helicoil . If you have an air line you can blow out the worst of the swarf and coz its mag/ally any remaining particles will burn off when it fires .

Edited June 2, 2013 by Stubby
spelling !

[openspaceman]

You don't have to remove the head with a helicoil . If you have an air line you can blow out the worst of the swarf and coz its mag/ally any remaining particles will burn off when it fires .

 

I've not done it on a saw but when I put a helicoil in the Subaru I had the piston on the upstroke nearing tdc and packed it with grease, then when finished just expelled the swarf with the grease. A quick spin of the engine then expels the remainder.

[Stubby]

I've not done it on a saw but when I put a helicoil in the Subaru I had the piston on the upstroke nearing tdc and packed it with grease, then when finished just expelled the swarf with the grease. A quick spin of the engine then expels the remainder.

 

Yea that works for me !

[Marc Lewis]

You don't have to remove the head with a helicoil . If you have an air line you can blow out the worst of the swarf and coz its mag/ally any remaining particles will burn off when it fires .

 

Ah, that's handy. Thanks all for your replies.

[GardenKit]

A helicoil is the accepted means of repairing a ply thread. it is perfectly strong, in fact, as AGG said, its stronger than the original thread.

 

As the plug now screws into steel thread rather than ally, it will last much longer than the original.

[Tom D]

Could you find a plug with a wider thread and drill out and re-tap?

[GardenKit]

Could you find a plug with a wider thread and drill out and re-tap?

Good luck with that one!

[spudulike]

I've found Time-Serts to be a far better job than Helicoils in things that need to be fastened and unfastened more that once in the lifetime of the component. Sparkplugs are pretty much the definition of threaded things that need to be used and reused frequently.

 

Time-Sert do sparkplug kits:

+ TIME-SERT® SPARK PLUG THREAD REPAIR KITS + spark plug stripped thread repair kits for spark plug problems, thread stripped spark plug repairs in damaged threads in spark plug hole stripped out approved thread repair, aluminum head spark plug repair

 

Wurth UK are the UK agents.

 

This is the type of repair I favour, helicoils are good if the part is tightened and isnt disturbed often, a sparkplug is reasonably often removed and is under extreme conditions of pressure and heat.

 

I used aluminium inserts but had problems with them blowing out, What really works is cutting a real decent thread with a deccent tap and inserting a steel insert with a bit of loctite high temp / high strength thread lock - loctite 270 is good.

 

The important bit is to get a deep well formed thread for the insert to key on. Cheap kits have poor taps and that forms a poor rounded thread and that will let an insert blow out!

[spudulike]

Good luck with that one!

 

I did find these oversize plugs on ebay once....from China....highest quality:lol:

 

An option though:thumbup:

[spudulike]

Here you go - Car Auto Moto Bicycle Repair Part Universal Spark Plug | eBay