Continental IO 520A: Hot cylinder

[FlyinTN]

I have a Meyers 200D with IO 520A. Top overhaul done 500 hrs ago. The #6 cylinder is running hot (400-450) on climb out. It is weird because it is the left front cylinder. Things AP/IA checked: Fuel injector, fuel line, engine baffling, spark plug, mag timing. All ok. I am climbing at poh recommend airspeed. Cowl flaps open. Mixture is full rich. Fuel flow 25+gph. Borescope of cylinder is good. Compressions good. Once in cruise, all is fine. Temp goes down to 375. We are at a dead end. Any ideas? Thanks

 

[455 Bravo Uniform]

You didn’t mention intake leak check. More air is more lean and more hot (up to a point). Make sure hoses and intake are tight for that cylinder. Too tight can also crush deform tubes and worsen leaks. Long shot.

 

[simtech]

That’s cylinder #6 right? Those are notorious for running hot. Mine did the same and I installed a GAMI #6 baffle kit and temps are waaay down now on it.

 

[FlyinTN]

Did you install gami injectors and new engine baffles? Please clarify.

 

[Daleandee]

Did you verify that the sensor on that cylinder is reading correctly?

 

[FlyinTN]

Yes we did.

 

[simtech]

General Aviation Modifications, Inc.

General Aviation Modifications, Inc

gami.com

Scroll down to the bottom of the list. I installed the #6 kit only. Basically you add a hole in the governor plate and a new baffle around the cylinder in its simplest terms. It wasn’t hard at all. Took maybe an hour.