trying to change retainers without dropping the valves and not removing the head, jdm b18c

 

I believe your looking for this tool. I know snapon make them but there are other companies out there for less.

 

how about a backyard special

 

well theres a cheap one on ebay, but its gonna be sllllooooow and also you dont want any backyard specials, those will only cause you grief.

 

you need a 14mm spark plug adapter with a air line fitting on it. You could adapt a compression tester into something like this and i beleive they sell them aswell. You could also adapt a pressure regulator onto it aswell to regulate the amount of air pressure. Remove the camshafts and timing belt and begin to remove the valves. The compressed air will hold the valves up and ensure they won't drop. Be careful not to loose the keepers!!! I have done this before when removing and installing new valve seals on a d-series, but i didn;t have to remove the camshaft.