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Ford 9N, 2N & 8N Discussion Forum

HeliCoil

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Jack L

06-30-2005 06:43:14

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One of the many things on my to do list is removing my head and seeing why the number 1 spark plug rotates with the vibration of the engine running. There's a little oil running down the head right at the spark plug. I've tried tightening it but it keeps spinning. I suspect the threads are shot in the head. My question is: do you guys think I can drill and put in a helicoil my self or is it critical enough to take it to a machine shop?

This seems to be my most pressing repair at the moment because I'm wondering how much power I'm losing.

Thanks for any help you can provide.

Jack

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Hobo,NC

06-30-2005 07:19:19

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Re: HeliCoil in reply to Jack L, 06-30-2005 06:43:14

Don't remove the head go to NAPA and git a Save-A-Thread spark plug hole thread insert and the tap kit its all ya need top do'it

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Dell (WA)

06-30-2005 07:18:24

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Re: HeliCoil in reply to Jack L, 06-30-2005 06:43:14

Jack..... ..gonnna guess that yer talkin'bout the OHV NAA engine 'cuz the flathead N-Engine don't goot no oil in the head.

YES, you can "repair" worn sparkplug threads. I recommend "Kline-zerts" (I think I spelled it correctly). They are a "wedged" staked insert that does NOT need special thread tap of the "heli-coil" insert. I don't like heli-coils because they will "un-thread" on constantly removed screws like sparkplugs.

Consult A good engine repair shop for your options. DON'T HELI-COIL!!!!

But FIRST, I'd change yer sparkplug for NEW. Sometimes the sparkplug thread is slightly "undersized". A $2 sparkplug is better'n a $25 head-removal repair. Also do a cylinderhead sparkie-thread clean-out with a special sparkplug thread-chaser. ($5, cheap)..... ....Dell

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Russ SoCal

06-30-2005 08:16:02

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These puppies? in reply to Dell (WA), 06-30-2005 07:18:24

keensert

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Jack L

06-30-2005 07:32:34

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Re: HeliCoil in reply to Dell (WA), 06-30-2005 07:18:24

Thanks for the input guys. I'm talking about my 8N Dell. Whatever is leaking down is blowing by the spark plug.

I will look for both or either products at my local Pep Boys and the thread chaser also.

Thanks,
Jack

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