Heys guys how's it going . I'm trying to put the intake cam back on rear cilinder and it wont go back with the line completely flush with the block as I pulled it . Are these cams spring loaded ? Wsm says nothing about cam gears moving when being pulled. Does it need to be perfect putting it back or just as long as. Marks are close to the block ?
Sorry, work gets in the way of play...often.
The OEM cams do have spring loaded quieting gears (the Navy called them split gears).
When trying to install the cams they will not fully seat due to the spring tension on the quieting gears.
Usually, if you get them very close, they will show aligned once the journal caps are installed and snugged.
The front cams are especially difficult to eyeball with the radiators in place.
I usually get them as aligned as I can tell, then install the journal caps and lightly snug them in place (not torqued) to check alignment.
If all looks good, then I torque to spec in a criss-cross manner for each cam.
As an FYI, the lower-most gear on the cam drivetrain driven by the crankshaft, also uses a quieting gear.