I want to replace my cam with the engine in the car. Is there a hole in the adjustable lifters that I can put a nail through to hold them up? Thanks Al
No, only in some solid lifters. You may use some type of clamps?
Remove the valve springs and hold them up with clothespins.
The head has to be off, but what Ted says is how I do it.
You may be able to put air pressure in each cylinder and compress the valve springs enough to remove the keepers with out removing the head. Has anyone tried this short cut?
You could get the pin out but you would have to remove the cup using air pressure to hold the valve closed. The hole in the cup is smaller then the push rod so you would still have spring pressure on the lifter. You would need the screw turned all the way down if they are adjustable lifters, even then my not be enough room to tip the cup out. If you could get that far you would still have to contend with the length of the spring, getting it up out of the way and putting a close pin on the lifter to hold it up.
Sounds like much less trouble just removing the head
No need to take the head off. You have the manifolds off so just lift the valves up and with something of your own making, jam them up through the ports, and peg the lifters up.
Its easier to just take the head off IMHO.
I don' think there's a garage on earth where mechanics don't pressurize the cylinders with air to change valve springs and seals.
I'm with Royce. I'd suggest you take the head off. Not because it is easier, but so you can inspect the valves and see if they need to be touched up a little.
: ^ )