Leakdown test

[GeoffM]

I have no compression in cylinder number 2.
We don't know why.
If I use a leakdown test, is there anyway I can differentiate between a leaking valve and blown rings?

(Not my engine btw)

Wouldn't air escaping through the oil mean it could be either?

[MortsAccord]

You'd be able to hear where the air would be rushing out from.
Intake manifold, exhaust manifold, or crankcase(see below).


Was the spark plug in good condition? I have heard of the spark plugs ground strap breaking off and the plug just arching to the piston and eating a hole in it.

[GeoffM]

That makes sense.
I haven't looked at it.
My cousin took his civic to a shop and they reported cylinder number 2 as having no compression.
When he gets it back tomorrow, we'll give it a shot.