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Originally Posted by SmokingSS
ok, i will soon need to chage out my set of valvesprings to a better set and i refuse to pull the heads, so how do i go about changing them? The one procedure i saw was to put like 15psi of air in the cylider and chage those 2 vales springs, then move to a different cylinder, Is that the best way? or the only way? lol. if so, where do I get a air fitting that screws into the sprak plug hole, and can i just use a bicycle foot pump to fill the air since i dont have my compressor yet? I also assume i'll need to get a valvespring tool that bolts where the rockers go so i can compress the springs. any specific advice/help would be appreciated, oh and for all intents and purposes its an LSx based engine.
also does anyone have a late model GM valvespring compressor i can borrow or rent.. it is $100 from summit, screw that
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That's the only way to do it with the heads installed on the motor. And you will need a compressor to maintain the cylinder pressure just in case. Check ls1tech.com for the tool, someone make a nice one and I believe its cheaper than the summit job. You will also need the air inlet adapter for spark plug hole. Without the right tools, you will end up pulling the heads because a valve will drop. One trick is to bring the piston to tdc on that cyl so if the valve does drop it won't go far and maybe....just maybe you could pull it back up if it is still in the guide.....don't know if that trick actually work, but I've been told.....
You may have trouble with header clearance and the adapter fitting???
I've done this swap on SBC, but never and LSX motor.....
Chris