---------------------------------------------------------- Engines-List Digest Archive --- Total Messages Posted Tue 01/17/06: 7 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 03:34 AM - Stuck Plug- Follow-Up Question (Alexander, Don) 2. 05:06 AM - Re: Stuck Spark Plug (Archie) 3. 05:24 AM - Re: Stuck Spark Plug (Mike Lehman) 4. 06:39 AM - Re: Stuck Spark Plug (longg@pjm.com) 5. 08:13 AM - Re: Stuck Spark Plug (Dave Nellis) 6. 10:48 AM - Re: Stuck Spark Plug (TeamGrumman@AOL.COM) 7. 10:50 AM - Re: Stuck Spark Plug (TeamGrumman@aol.com) ________________________________ Message 1 _____________________________________ Time: 03:34:01 AM PST US Subject: Engines-List: Stuck Plug- Follow-Up Question From: "Alexander, Don" --> Engines-List message posted by: "Alexander, Don" Thanks for all of the ideas. I will continue to soak the plug and see if we can break her free. Regards, Don ________________________________ Message 2 _____________________________________ Time: 05:06:15 AM PST US From: "Archie" Subject: Re: Engines-List: Stuck Spark Plug --> Engines-List message posted by: "Archie" Aircraft plug manufacturers recommend using a light anti seize compound on the threads, avoiding getting any on the "nose" of the plug. Most have their own, which is a bit thinner than the more conventional anti-seize. ----- Original Message ----- From: "Tedd McHenry" Sent: Tuesday, January 17, 2006 1:15 AM Subject: Re: Engines-List: Stuck Spark Plug > --> Engines-List message posted by: Tedd McHenry > > On automotive engines I have always used Copaslip or a similar, > high-temperature anti-sieze compound on the spark plug threads. But many > years > ago someone told that that this is a bad idea on engines with air cooled > cylinder heads, due to lowering the heat transfer between the plug and the > head. I've always thought this advice had "old wives tale" written all > over > it, but it has nevertheless prevented me from using anti-sieze compound on > aircraft engines. Am I worried about nothing? > > --- > > Tedd McHenry > Surrey, BC, Canada > > > ________________________________ Message 3 _____________________________________ Time: 05:24:52 AM PST US From: "Mike Lehman" Subject: Re: Engines-List: Stuck Spark Plug --> Engines-List message posted by: "Mike Lehman" Tedd, It is more important to use anti-seize on air cooled aircraft engines because the aluminum head and therefore the threaded head-to-plug joint runs much hotter than with liquid cooled engines. I not seen any evidence that anti-seize affects plug temperature; it might even reduce it by increasing thread contact area with the head. In any event, I believe that any such change is negligible relative to other factors. I use anti-seize on all spark plugs used with aluminum heads (both air and liquid cooled), either the usual paste type or plain graphite powder. I suggest that the very long plug maintenance intervals with modern cars and poor access with most V engines (to the plugs for 'rear' cylinders) makes anti-seize increasingly important. Mike ('with' aluminum Lycoming and aluminum auto heads) --> Engines-List message posted by: Tedd McHenry On automotive engines I have always used Copaslip or a similar, high-temperature anti-sieze compound on the spark plug threads. But many years ago someone told that that this is a bad idea on engines with air cooled cylinder heads, due to lowering the heat transfer between the plug and the head. I've always thought this advice had "old wives tale" written all over it, but it has nevertheless prevented me from using anti-sieze compound on aircraft engines. Am I worried about nothing? --- Tedd McHenry Surrey, BC, Canada -- ________________________________ Message 4 _____________________________________ Time: 06:39:20 AM PST US From: longg@pjm.com Subject: RE: Engines-List: Stuck Spark Plug --> Engines-List message posted by: longg@pjm.com Don't bother, just add heat. I noticed you live in B.C.; Add more heat than usual. -----Original Message----- From: owner-engines-list-server@matronics.com [mailto:owner-engines-list-server@matronics.com] On Behalf Of Tedd McHenry Sent: Tuesday, January 17, 2006 1:16 AM Subject: Re: Engines-List: Stuck Spark Plug --> Engines-List message posted by: Tedd McHenry On automotive engines I have always used Copaslip or a similar, high-temperature anti-sieze compound on the spark plug threads. But many years ago someone told that that this is a bad idea on engines with air cooled cylinder heads, due to lowering the heat transfer between the plug and the head. I've always thought this advice had "old wives tale" written all over it, but it has nevertheless prevented me from using anti-sieze compound on aircraft engines. Am I worried about nothing? --- Tedd McHenry Surrey, BC, Canada ________________________________ Message 5 _____________________________________ Time: 08:13:19 AM PST US From: Dave Nellis Subject: Re: Engines-List: Stuck Spark Plug --> Engines-List message posted by: Dave Nellis On our club aircraft, we do 50 hour inspections and oil changes. Every inspection includes spark plug cleaning and regapping. Before the plugs are re-installed, a very small amount of Champion Spark Plug Lubricant is applied to the threads. I must emphasize, a very small amount is used. Over a period of 2000 hours, that amounts 40 times the spark plugs are removed and re-installed. Dave --- Tedd McHenry wrote: > --> Engines-List message posted by: Tedd McHenry > > > On automotive engines I have always used Copaslip or > a similar, > high-temperature anti-sieze compound on the spark > plug threads. But many years > ago someone told that that this is a bad idea on > engines with air cooled > cylinder heads, due to lowering the heat transfer > between the plug and the > head. I've always thought this advice had "old > wives tale" written all over > it, but it has nevertheless prevented me from using > anti-sieze compound on > aircraft engines. Am I worried about nothing? > > --- > > Tedd McHenry > Surrey, BC, Canada > > > > > > browse > Subscriptions page, > FAQ, > http://www.matronics.com/Navigator?Engines-List > > Admin. > > > > > > > > > > > ________________________________ Message 6 _____________________________________ Time: 10:48:03 AM PST US From: TeamGrumman@AOL.COM Subject: Re: Engines-List: Stuck Spark Plug --> Engines-List message posted by: TeamGrumman@aol.com I use the Permatex 'silver' anti-seize compound. I've never had any problems with it. ________________________________ Message 7 _____________________________________ Time: 10:50:04 AM PST US From: TeamGrumman@aol.com Subject: Re: Engines-List: Stuck Spark Plug --> Engines-List message posted by: TeamGrumman@aol.com I did have a plug stick in a cylinder head on an O540 in a Commanche. When the plug came out, the heli-coil came with it. THe owner claimed he always used the Champion anti-seize. I've always used the Permatex anti-seize and I've been very happy with it.