How to: Compression test?

[Deadhead86]

Can anyone give me a walk through on how to do a compression test? Ive got everything needed, but I have never had to do one before, so Im really gonna need someone to break it down barney style, and give me a step by step. Also, what are ideal numbers that Im looking for? Its gonna be done on a 97' Disco I, with 131XXX on her.

Thanks

 

[joey]

Did I not break it down far enough for you in your other post?

 

[Deadhead86]

It was, but I still need to know what kinda numbers Im looking for. Sorry, Im asking so many questions regarding this, but Ive never attempted doing this before and I just wanna be sure.

 

[joey]

Equipment:
Compression pressure gauge
Test
1. Start and run engine until normal engine
operating temperature is achieved (thermostat
open).
2. Remove all spark plugs.
3. Disconnect both coil negative (WB) leads
4. Insert compression gauge, crank engine until
reading stabilises.
5. Expected readings, throttle fully open, battery
fully charged:
8.31:1 = 10.2-10.9 bar, 150-160lbf/in2
9.35:1 = 11.5-12.2 bar, 170-180lbf/in2