Spark plugs leaking

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Model T Ford Forum: Forum 2014: Spark plugs leaking
Top of pagePrevious messageNext messageBottom of page Link to this message  By michael grady on Monday, March 24, 2014 - 10:11 am:

I think I'm getting a little exhaust leak around my spark plugs. I washed the car this weekend and then started it. I saw lots if bubbles where the water had pooled around the plugs, and I'm pretty sure I saw exhaust coming from around them.

I'm guessing this could result is a loss of power, correct? Maybe one of the issues I have with pulling hills?

Is there any sealant I can use to correct this?

Thanks guys,

Michael.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Mark Strange on Monday, March 24, 2014 - 10:14 am:

I have heard some recommend wrapping aluminum foil around the threads. I put a couple turns of teflon tape around mine and it seems to work fine. Apparently the pipe threads cut through the tape enough to provide a good ground.

If you use teflon tape, it acts somewhat as a thread lubricant, so don't go crazy with the wrench tightening the plugs down.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Les VonNordheim on Monday, March 24, 2014 - 10:21 am:

I use Aircraft Permatex sealant. Works great, you do not need to over tighten using Permatex. Removing and installing a new spark plug is no problem, just add a small amount when putting in the new plug. NAPA has it in their brand.


Top of pagePrevious messageNext messageBottom of page Link to this message  By David Menzies on Monday, March 24, 2014 - 10:59 am:

If the leak is difficult to stop you might try a small dot of solder on the threads. Clean, flux and a dot just enough to run around the threads. I had a head with rusty threads and this method worked well.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Jim Thode Chehalis Washington on Monday, March 24, 2014 - 11:08 am:

Here are a bunch of ideas from this forum:

2013
http://www.mtfca.com/discus/messages/331880/408263.html?1387406036

2012
http://www.mtfca.com/discus/messages/257047/261098.html?1327015328

2011
http://www.mtfca.com/discus/messages/179374/212905.html?1306244869

2009
http://www.mtfca.com/discus/messages/80257/94941.html?1244893623

Some folks don't worry about it and some go as far as retapping the head.

Jim


Top of pagePrevious messageNext messageBottom of page Link to this message  By keith g barrier on Monday, March 24, 2014 - 11:45 am:

Plain old pipe thread dope works fine, a small tube in your tool box will last you a lifetime. KGB


Top of pagePrevious messageNext messageBottom of page Link to this message  By Justin in South Africa on Monday, March 24, 2014 - 12:00 pm:

Copperslip or thread paste works great. .. had the same problem. . Too much teflon tape and you will have spark problems. .

Hope this helps

Justin
South Africa


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