Installing Valve Springs

[17psi r33]

putting better valve springs in my car this weekend, anyone done this befor and can give some good pointers, i have the gear to fill the cylender with air to hold the valve in place when springs are out, i have also been told about placing string in the cyclender when all the way down and then winding to top dead center so if air fails the string will be a safe gard for valve dropping into block, my main question is about getting cams back in exact location, can i leave cams attached to cam gears when removing them so i just have to line cams back up when re-installing them?

[boostn0199]

Well no you cant because you have to remove the rear plastic cover to remove that you have to remove the cam gears. Ill add my tips aswell as I just did my springs and I used the compressed air method but eventually one of the valves dropped because the compressed air caused the crank to spin for a sec lost pressure and down went the valve. So if your going to use the compressed method make sure you have someone holding the crank or put the ratchet against the body so it cant rotate. Or you can just do the string method.

In regards to lining everything up what I recomend and alot of other people do when you have everthing at TDC rotate the crank a little bit backwards in order to move piston 1 and 6 from TDC so then theres no need to worry if the cams arent in exactly right or rotate during when you tighten them up. Then when youve reinstalled the cams just set the cams to the correct postion then rotate the crank forward back to tdc.

[DVS JEZ]

put it in gear so the crank doesnt spin. Unless its auto