---------------------------------------------------------- Jabiru-List Digest Archive --- Total Messages Posted Fri 04/11/08: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:06 PM - Probe Question (Jim Crowder) 2. 04:23 PM - Re: Probe Question (BobsV35B@aol.com) 3. 04:42 PM - Re: Probe Question (BobsV35B@aol.com) 4. 09:40 PM - Probes (Jim Crowder) ________________________________ Message 1 _____________________________________ Time: 04:06:06 PM PST US From: "Jim Crowder" Subject: Jabiru-List: Probe Question There was a thread that ran regarding small holes between the plugs on some of our engines. I tried to follow this thread, but do not recall reading a definitive answer. The thought was that these might be for temperature probs. I just checked my engine and I do have small holes (about 1/8" diameter and about one inch deep, I didn't actually measure). Are these the holes in question and are they for probes? Jim Crowder S5/3300 Jabiru (Engine swap in process) North Front Range of Colorado ________________________________ Message 2 _____________________________________ Time: 04:23:58 PM PST US From: BobsV35B@aol.com Subject: Re: Jabiru-List: Probe Question Good Afternoon Jim, I hate to add to an uncertainty with something I cannot substantiate, but I was told that those holes are put there for use of CHT probes. The problem is that no one is making a probe of the proper temperature range that will fit in those holes. Incidentally, I did find a Champion spark plug that appears to be interchangeable with those that came with the engine. The Champions use a smaller wrench. (I think it is 5/8ths of an inch instead of 11/16th of an inch.) That small change makes it just a tiny bit easier to tighten the CHT probes on the spark plugs. I believe this is all in the maintenance manual, but it is important to get the gasket off the plug and put the CHT probe on the plug before the gasket is applied. I found it very difficult to get the supplied spark plug gasket off of the Champion plug so that I could put the CHT sensor on the plug before the plug gasket. Worked easier on the supplied plugs. Sure wish they would find a way to use those little holes for the CHT temperature! Happy Skies, Old Bob AKA Bob Siegfried Ancient Aviator 628 West 86th Street Downers Grove, IL 60516 630 985-8502 Stearman N3977A Brookeridge Air Park LL22 In a message dated 4/11/2008 6:06:38 P.M. Central Daylight Time, jcrowder@lpbroadband.net writes: --> Jabiru-List message posted by: "Jim Crowder" There was a thread that ran regarding small holes between the plugs on some of our engines. I tried to follow this thread, but do not recall reading a definitive answer. The thought was that these might be for temperature probs. I just checked my engine and I do have small holes (about 1/8" diameter and about one inch deep, I didn't actually measure). Are these the holes in question and are they for probes? Jim Crowder S5/3300 Jabiru (Engine swap in process) North Front Range of Colorado **************It's Tax Time! Get tips, forms and advice on AOL Money & Finance. (http://money.aol.com/tax?NCID=aolcmp00300000002850) ________________________________ Message 3 _____________________________________ Time: 04:42:40 PM PST US From: BobsV35B@aol.com Subject: Re: Jabiru-List: Probe Question Pardon the uncertainty, but I think the supplied spark plugs uses an 18 MM wrench, not an 11/16ths one. It has been almost a week and a half since I tightened them and my memory is getting very short! Happy Skies, Old Bob AKA Bob Siegfried Ancient Aviator 628 West 86th Street Downers Grove, IL 60516 630 985-8502 Stearman N3977A Brookeridge Air Park LL22 In a message dated 4/11/2008 6:20:42 P.M. Central Daylight Time, Bobs V35B writes: Incidentally, I did find a Champion spark plug that appears to be interchangeable with those that came with the engine. The Champions use a smaller wrench. (I think it is 5/8ths of an inch instead of 11/16th of an inch.) That small change makes it just a tiny bit easier to tighten the CHT probes on the spark plugs. I believe this is all in the maintenance manual, but it is important to get the gasket off the plug and put the CHT probe on the plug before the gasket is applied. I found it very difficult to get the supplied spark plug gasket off of the Champion plug so that I could put the CHT sensor on the plug before the plug gasket. Worked easier on the supplied plugs. **************It's Tax Time! Get tips, forms and advice on AOL Money & Finance. (http://money.aol.com/tax?NCID=aolcmp00300000002850) ________________________________ Message 4 _____________________________________ Time: 09:40:26 PM PST US From: "Jim Crowder" Subject: Jabiru-List: Probes There was a thread that ran regarding small holes between the plugs on some of our engines. I tried to follow this thread, but do not recall reading a definitive answer. The thought was that these might be for temperature probes. I just checked my engine and I do have the small holes (about 1/8" diameter and about one inch deep, I didn't actually measure. Are these the holes in question and are they for probes? Jim Crowder S5/3300 Jabiru (Engine swap in process) North Front Range of Colorado ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message jabiru-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Jabiru-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/jabiru-list Browse Digests http://www.matronics.com/digest/jabiru-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.