I have a carbureted Lyc O-360 in my plane, top plugs are lightspeed EI and the lowers are Bendix Mag. Typically in cruise my CHT's are 360 +/- 10 degrees F. The engine has about 800 hours since the last overhaul, and has superior power units (cylinder, piston, head). On a hot day, running all out (racing) my CHT's may reach 410F or so, but are all fairly even.
About a month ago, the number 3 cylinder spiked a above the others by 30 to 50F, so it might hit 430F in a climb, and with the others maxing out at about 375-380F. After getting to cruise speed, it would go to 360F on the other 3, and be difficult to keep the number 3 below 400F.
Coincidently with all this, I changed my crankcase breather line routing, and now I am going through a lot of oil. I suspect the new routing, but it could be related to other stuff going on in the engine, none of it good.
I think a lot of it is going out the breather because I now am having oil dripping off my airplane that I did not have before. I plan to add in a separator, but if something is seriously wrong with number 3, I need to solve that first.
Any advice on diagnosing the problem would be appreciated.
About a month ago, the number 3 cylinder spiked a above the others by 30 to 50F, so it might hit 430F in a climb, and with the others maxing out at about 375-380F. After getting to cruise speed, it would go to 360F on the other 3, and be difficult to keep the number 3 below 400F.
Coincidently with all this, I changed my crankcase breather line routing, and now I am going through a lot of oil. I suspect the new routing, but it could be related to other stuff going on in the engine, none of it good.
I think a lot of it is going out the breather because I now am having oil dripping off my airplane that I did not have before. I plan to add in a separator, but if something is seriously wrong with number 3, I need to solve that first.
Any advice on diagnosing the problem would be appreciated.