Compression Check question
 

How can you compression check a cold engine that doesn't even have a starter. Is it even possible?
For example, a non-running '79 that has no starter and no radiator.
Or an engine that's outside of the car.
Is there even a way to do it?
Is an engine like that even worth any money if I sell it?
It turns freely by hand so I know it's not carbon locked....

Yes, the engine is worth money, as far as compression testing it...?

Yes you can. Turn the engine by hand (17mm bolt on front) and you should hear three chugs/pulses out the exhaust port on each rotor. While you turning the motor you can also take a look at the apex seals as they go past the exhaust port.

if its for a 13b the numbers are...120 brand new....100 still good....80 starting to wear...and 60-70 is a bad motor

But if you're turning it by hand you won't get anywhere near those numbers, right? I certainly didn't. Nore like 9psi
But each rotor was roughly the same as the other rotors.