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222 – How an Engine Cylinder Went From 25/80 to 75/80!

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Manage episode 363255743 series 1028900
Content provided by Dean Showalter. All podcast content including episodes, graphics, and podcast descriptions are uploaded and provided directly by Dean Showalter or their podcast platform partner. If you believe someone is using your copyrighted work without your permission, you can follow the process outlined here https://player.fm/legal.

I inspected another A36 Bonanza recently, and one of the cylinder compressions was too low… lower than the minimum prescribed by Continental using the master orifice tool.

I had two options:

Option One: Remove the cylinder for repair or replacement.

Option Two: Make the exhaust valve seal better and improve the compression result in hopes of saving the cylinder from premature amputation.

I chose Option Two.

It was at least worth a try…

… and the result was stunning!

After lapping the valve in place and installing a new rotocoil, I ran the engine again and rechecked the compression.

It was 75/80!

The lowest cylinder on the engine was now the highest cylinder.

I also lapped the exhaust valve in cylinder #2, and that one improved from 49/80 to 63/80.

If you’d like more info about valve lapping, click here for episode 109.


Another surprise during the inspection was a cracked / leaking exhaust riser.

Here’s a close-up view of the bad area:

Also in this episode, I talked about some other squawks that were repaired during the inspection. Be sure to listen to the audio for all the details.


In Part Two of this episode, I talked about our most recent trip in the King Air. It was quite an adventure navigating some weather situations!


The post “222 – How an Engine Cylinder Went From 25/80 to 75/80!” appeared first at AirplaneOwnerMaintenance.com

  continue reading

156 episodes

Artwork
iconShare
 
Manage episode 363255743 series 1028900
Content provided by Dean Showalter. All podcast content including episodes, graphics, and podcast descriptions are uploaded and provided directly by Dean Showalter or their podcast platform partner. If you believe someone is using your copyrighted work without your permission, you can follow the process outlined here https://player.fm/legal.

I inspected another A36 Bonanza recently, and one of the cylinder compressions was too low… lower than the minimum prescribed by Continental using the master orifice tool.

I had two options:

Option One: Remove the cylinder for repair or replacement.

Option Two: Make the exhaust valve seal better and improve the compression result in hopes of saving the cylinder from premature amputation.

I chose Option Two.

It was at least worth a try…

… and the result was stunning!

After lapping the valve in place and installing a new rotocoil, I ran the engine again and rechecked the compression.

It was 75/80!

The lowest cylinder on the engine was now the highest cylinder.

I also lapped the exhaust valve in cylinder #2, and that one improved from 49/80 to 63/80.

If you’d like more info about valve lapping, click here for episode 109.


Another surprise during the inspection was a cracked / leaking exhaust riser.

Here’s a close-up view of the bad area:

Also in this episode, I talked about some other squawks that were repaired during the inspection. Be sure to listen to the audio for all the details.


In Part Two of this episode, I talked about our most recent trip in the King Air. It was quite an adventure navigating some weather situations!


The post “222 – How an Engine Cylinder Went From 25/80 to 75/80!” appeared first at AirplaneOwnerMaintenance.com

  continue reading

156 episodes

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