What is a "compression" check?

My engine is burning oil n most probably the piston rings r unpromising....So...How do u do a compression check?

I cracked the plastic cover of the...



Answers:    a gauge that screw into your spark plug hole, get it at a auto parts contractor like napa, screw it surrounded by to your plug hole, then turn the engine over and read what the lbs presure say on guage.

How do I know for sure if...


Buy a tool like this:
http://www.roostracing.co.uk/images/Moti...

Or lift it to a shop and have it done.
Scored cyl walls, bleak rings could do it, but so could bad stopcock seals.

EDIT:

Make sure you disengage the spark to the plugs back turning it over to check ;)

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