How to Perform a Relative Compression Test on an Engine

This video shows how to use a lab scope to perform a relative compression test to quickly assess the mechanical condition of an engine.

[arthurfricchione]

Excellent video Justin. Very informative thanks 👍👍👍

[nickayivor]

Justin Miller take care and have a great day Justin Miller
Great tutorial thank you very much
From Nick Ayivor from London England UK 🇬🇧

[kebnl]

I am waiting on my pico scope to arrive, and you have explained the operation in great detail, and made it very clear. By the way I have been following your instructions on the pico sample software on this as you explain for this and other of your videos GREAT JOB THANKS. PS were did you get the pen to write the notes on the relative compression test?

[terrencecarter]

On this type of testing using the oscilloscope is it better to have an attenuator on the first channel?

[rrmech]

excellent video
where can I get the best deal on a pico scope

[billwilliams]

JUSTIN when one or more pistons are NOT giving any compression. What would be the problems on the cars engine?
Do you have to replace the piston or the actual engine block is cracked inside that piston cylinder and have to replace the whole engine block?