Valve Spring Removal W/ Head on

[JayDM420]

So I've got a Redtop S13 Sr20det that I have been building to install in my S14.

I bought the Bc stage 2 cams and Bc valve springs kit. I have the motor un-installed for easy access but I would like to install the springs without removing the head if possible. When I searched around for a guide for doing this I came up with the nicoclub thread on How to build a 9000rpm Sr20det Head

http://www.nicoclub.com/archives/how-to-build-a-9000-rpm-sr20det-head.html

I have the tool in the red box that bolts onto the head to remove the springs but the only info this guy gives on removal with the head on is this

"First, stuff a tower underneath the valves that you are working on so that the valves do not move. If you are doing this with the head still on the motor, you NEED to pressurize the combustion chamber so that the valves don’t fall down."

How exactly do I do this on a Sr? What kind of attatchment am I going to need for my air compressor/where can I buy it? Where do I stick it lol? Any info would awesome

[Dboyizmlg]

Just take the head off!

It's much easier, at least for me it is.

[JayDM420]

It may be easier but it is certainly not cheaper lol

[dbeiler]

Compression gauges will usually come with a short hose extension. One end of the hose extension screws into the sparkplug hole, the other end has a pneumatic hose fitting.

[pacotaco345]

I've had friends who had luck taking the spark plug out, threading string down in there when the piston is at BDC, then rotating the motor to TDC so that the string keeps the valves pushed up. Never tried it myself though

[JayDM420]

Compression gauges will usually come with a short hose extension. One end of the hose extension screws into the sparkplug hole, the other end has a pneumatic hose fitting.

That almost seems to simple lol. Just connect em and flip the switch for the compressor? Should I get the cyclinder I'm working on to TDC before compressing the spring?

[PPman]

I did it on my ka with a air compressor, and a compression test hose from the cheap harbor freight kit. Putting the piston you are working on at TDC would be worth the extra safety, since your engine is out you should be able to get away with just that (TDC that is). Give it a try if you already have the compressor and fittings.

[JayDM420]

Alright this doesn't seem nearly as complicated as I anticipated, thanks for the info guys I really appreciate it!