corn_flake Posted October 2, 2019 Report Share Posted October 2, 2019 Let's just spit ball this one. Any one has a guess ask to why the cylinder #2 seem to run 30 to 60 degree hotter than the other 3? And yet the EGT temperature for all cylinders are all about the same on average. A quick review of the engine log for the past 8 years seem to show this engine has been flying like this without much issue. Quote Link to comment Share on other sites More sharing options...
gsxrpilot Posted October 2, 2019 Report Share Posted October 2, 2019 It could be the baffling. It could be a different temp probe, like a ring instead of the post on that cylinder and only the indication is different. I'm sure there are some other reasons as well. 2 Quote Link to comment Share on other sites More sharing options...
orionflt Posted October 2, 2019 Report Share Posted October 2, 2019 33 minutes ago, corn_flake said: Let's just spit ball this one. Any one has a guess ask to why the cylinder #2 seem to run 30 to 60 degree hotter than the other 3? And yet the EGT temperature for all cylinders are all about the same on average. A quick review of the engine log for the past 8 years seem to show this engine has been flying like this without much issue. how about some more info like engine and model of plane Quote Link to comment Share on other sites More sharing options...
carusoam Posted October 2, 2019 Report Share Posted October 2, 2019 Add some pics of your CHT sensors... follow Paul’s references above... It is either... real or sensor driven... What you described is what happens with a ring sensor being used. Best regards, -a- Quote Link to comment Share on other sites More sharing options...
CaptRJM Posted October 2, 2019 Report Share Posted October 2, 2019 (edited) If it’s a Continental, #2 is the most rear cylinder on the left side of the plane. They get a little less cooling and on a TSIO 360 it’s next to the oil cooler that is also radiating heat. This explains a minor elevation in #2 CHT but if you are getting a large difference then baffles might be the problem. Cylinder 3 is the center cylinder on a the right side. It really has no direct bearing on #2 CHT. Edited October 2, 2019 by CaptRJM Hit submit too soon Quote Link to comment Share on other sites More sharing options...
carusoam Posted October 2, 2019 Report Share Posted October 2, 2019 Flake... Time to update some data next to your avatar... the detail you gave... cylinder #2 ... might have more meaning if we know what engine it’s is on... or what plane it is sitting in... Or since we are only spit balling.... can we call this a win? You can get more answers, and more accurate answers... with more complete information... The avatar data stays around, until you change it... Best regards, -a- Quote Link to comment Share on other sites More sharing options...
corn_flake Posted October 2, 2019 Author Report Share Posted October 2, 2019 Guys, I just realized I posted this in the wrong section of the forum. Since the question is really about Pre-J module, I was making the assumption that most Pre-J model come with Lycoming IO-360 or O-360. Since cylinder #2 is actually in the front near the opening, in my non-enginniering mind, it should run colder. In any case, does any one know how to move this thread to Pre-J section? Thanks Quote Link to comment Share on other sites More sharing options...
carusoam Posted October 3, 2019 Report Share Posted October 3, 2019 Flake, You May try to a cut and paste maneuver...? Better make that a copy first, than paste... As the author of the thread... you have rights. Our Web master can possibly move things as well... try the report a post button... fill in your challenge details... reporting a post sends a message to the top... Most mistakes like this just fade into obscurity over time... Best regards, -a- Quote Link to comment Share on other sites More sharing options...
kmyfm20s Posted October 3, 2019 Report Share Posted October 3, 2019 It could also be an exhaust leak blasting the probe. Quote Link to comment Share on other sites More sharing options...
Yetti Posted October 3, 2019 Report Share Posted October 3, 2019 baffeling - on the plane not your question Probe wiring leaks around the altenator generator other low pressure area leaks Exhaust pipe routing Cowl flaps different cylinder heads How the little rod that ties the two shields around the cylinder heads is functioning or not if replaced with safety wire. Quote Link to comment Share on other sites More sharing options...
RogueOne Posted October 3, 2019 Report Share Posted October 3, 2019 (edited) My ‘66 E has ALWAYS indicated 50 higher on #2. If it wasn’t indicating that I would think I have a problem. That said the temps are not over 360 except MAYBE in climb on a hot day. Never over 400. I attribute it to probe placement or maybe type. I believe the OEM probe was also on #2 so the position and possibly the type of probe is different. Non-issue for me. Edited October 3, 2019 by RogueOne Quote Link to comment Share on other sites More sharing options...
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