Testing engine while out of car?
 

Other question is how can I tell if the engine has good compression. I turned it over with a wrench on the front pulley nut and heard hissing sounds. Then I felt the apex seals by hand and all were smooth and had slight amount of springage but allitle inconsistent with some others I felt. Some were tighter others were noticably springy.

You can hear for compression........ I've got an ear for it though.

ok thanks

Re: Testing engine while out of car?
 

Based on this info, I take it you don't plan on rebuilding the engine any time soon right? If so, you can perform this cheap technique to free the slightly sticking apex seals.

https://www.rx7club.com/showthread.p...5&pagenumber=1

It's the last post of the page. Keep in mind that I've done this myself my 13b engine w/74k miles while it was out when I replaced my clutch. This can greatly increase the compression of an engine thats been sitting up for a long time.

try what i did once: take the plugs out, get a long bolt that will screw into one of the holes that mount the pressure plate to use as a handle, now turn in the direction it runs like a crank. u can turn it this way just as fast as a starter will and listen for the compression sounds out the plug holes.

Thats a good idea!

God old mity I'm turning in my grave.

hey, it works.

Two things you can use a coperssion gage and remove that little valve and watch closely the needl bounce, or you can build your own compression test for less 20$ the only draw back is you need a scopc to bring it all to gether, I posted how to do this some time a go. THAT EAR SHIT REALY DON'T WORK you will but a lot of time into something that is all ready been dead.