LIGHT AIRCRAFT ENGINE COMPRESSION TEST PROCEDURE

A quick rundown on a Continental O-200 engine compression test procedure on a 1946 Luscombe 8A/O-200. Typical for most light aircraft engines.

[chrisduke]

Thanks for this video. You explained it much better than the others I've seen. I'm just getting back into the hanger after a 35 year absence as a A&P Assistant.

[redleader]

There's little Pete! Wont be long and you'll be fighting him for the plane!! You are a lucky man to be sure! It seem like your family enjoys all the adventures as much as you do sharing it with them...good stuff.

[johnrltr]

Juan, thanks for giving so generously of your time and expertise. Very much appreciated.

[mikephillips]

Brings back merrorys of a previous life when i was a ae apprentice

[oakenarbor]

Casting a long shadow already! Excellent. Your prop turn for TDC reminded my how I had to just turn my 67 VW over by pushing on the rear bumper to find TDC on her air cooled power plant;o Thanks for the lesson!

[glennneutrin]

i always wanted to know how to do a compression test, and what it tells you. Any pilot can understand this video...to the point : what you need, how to hook it up, where to hook it up and the process... excellent!

[xxxxxxxx]

Thanks. easy video to follow. In school to become A&P. this helped me remember the steps. Appreciate the video. Vard.

[skyrhigher]

Nice job Ron. Thx. Keep the videos coming.

[theflyingfool]

Now that's what I want to do with my grandson... aerocamping! brilliant! :)

[deepsixman]

Thanks. I just had this done on the same engine in a 1948 8A. I was not able to be there for the test, and had been looking to see how it is done.

[johnnydeep]

@blancolirio good job on the informative video, more power to your channel, a&p mechanic here also, trying to study more and learning more on piston engines, came from turbine aircraft, when pandemic came i was luckily got a job for company with small piston aircraft.👊🏻🤙🏼

[leesherman]

This is not what I would call a cyl. compression test but a cyl. leak down test. It is better than a comp. test since actual cyl. leakage can be determined and measured  thru valves or piston rings.

[andressalazar]

great video!!! very well explained, thanks!

[vincentmolloy]

Nice video Juan however I'm under the impression that this was a blow by test and not a compression test. A compression test is done by using a compression gauge in which you crank the engine over with the gauge attached in similar fashion. No compressor needed. The gauge holds the value of each compression stroke as you crank and you look for the highest reading after a few cranks. The blow by test I think is more accurate because you will also hear where your cylinder is leaking from. Through the Exhaust, intake or through the engine oil breather🤷‍♀️

[mhilderbrand]

Nice simple video on the process, thanks for posting!

[knowyourenemy]

Nice video. I do the same on the aircraft diesel engine, placing the probe on the injector housing instead.

[k-lubgamingchannel]

You should use a straightedge to determine too dead center and compare it to Tdc mark.

[gustavocampos]

Great great great, thanks for the video, Isabel really helpfull

[John-ncbl]

On the cylinder being leak checked, the piston rings should be seated in the bottom surfaces of their lands, (ring grooves in the piston).
To achieve this the piston must be coming up on its upstroke.

If the rings are not seated in the bottom of their lands, the compressed air can escape thru the ring gaps, then under the rings and give a little lower gage reading.

[landonhillyard]

so that engine is completely air cooled? looks like a sweet job.