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Rethreading Spark plug holes on an ej22


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#1 Meadyy8

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Posted 20 October 2013 - 07:15 PM

So, the threads on my spark plug holes have failed/been damaged, tbh i dont have a forking clue what has caused this. Basically, i was driving along on night, and the spark plug and lead fell out causing it to run on 3 cylinders obviously. Just screwed the plug back in an tightened it, all was fine, this was about a week and a bit ago.

 

 

Then today, it happened again, i dont know whether a combination of the rough rural roads and coilovers has caused this or what, but then after putting it in for the second time this morning. I drove half way to work and then it happened again. Except this time, not expecting it to have happened 20kms after the last incident,  I went to replace the plug and the hole seems to have no thread, it wont hold the plug.

 

Got the car towed home 15km, was lucky, flagged down a towie and he ended up doing a cashie for me. Cars currently sitting in the driveway and im well and truly over it for the day.

 

Regardless, I have no idea what the fork im gonna do now ladies and gents, and advice or tips would be appreciated. Its a 1998 ej22, if that makes a difference at all.

 

Cheers guys, Meadyy.



#2 bluebrz

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Posted 20 October 2013 - 07:30 PM

There is a company called Helicoil , that can replace the spark plug threads on the head without dissembling the engine.

Just make sure that the cylinder bores are vacuum cleaned before the spark plugs are refitted.

My friend once snapped a spark plug off when trying to change it.

They had to drill it out and then helicoil the thread back.



#3 Robert

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Posted 20 October 2013 - 07:39 PM

I don't know what causes it but It has happened to a few people in the past. Yea get the pros out and they put a helicoil in it and it will be as good as new.

#4 RX25SE

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Posted 21 October 2013 - 05:57 AM

I would recommend a Wurth 'Time Sert' (see pic) as the new thread forms a cylinder, unlike a helicoil that forms a coil.

 

 

 

image003.gif

 

These were specifically designed to repair plug threads.

 

Either way, the suggestion of calling in a pro is the best option.


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#5 Meadyy8

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Posted 27 October 2013 - 10:18 PM

Time sert's are awesome just btw. Simple as to use. Did it with the old man took all of 10 minutes. Expensive bit of gear though.

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#6 B4TT

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Posted 06 November 2013 - 02:41 PM

Nice! Time Sert looks sweet - So you have the car all back and running now?

 


#7 Meadyy8

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Posted 09 November 2013 - 08:28 AM

Yeah mate. All good. Hssnt missed a beat since. *touch wood*.


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