A65 1968 Camshaft concern

[Chriss750]

Hi all. So the engine rebuild has progressed slowly, end float set and cases reunited. But, it seems to me that the camshaft isn't turning as freely as it did before the strip down. Nothing has been changed apart from replacement of the breather spring. It is quite easily turned by hand and can be spun with a cordless drill no problem, but it just seems a bit stiff all round, although there are no tight spots. I read elsewhere that temporarily fitting the barrels can pull the case alignment into shape so I tried that but it made things worse.
I don't know what I've done wrong. Has anyone else had this experience?
Also the pinion was a quite incredibly tight fit even when heated and it's on as far as I can get it, but there's still a touch of endfloat on the camshaft which I can seem to eradicate.
Any assistance appreciated!

[Allan G]

This can happen until the cases are bolted up properly. Assuming also that the tangs on the disc are properly slotted in the end of the cam.

[limeyrob]

A10 or A65?  With an A10 the engine plate studs may make a difference.

[Chriss750]

It's an A65. I'm sure the breather disc is aligned with the cam. I tested this several times before jointing the cases. With the disc engaged I could feel the spring. When I deliberately tried mis-aligning it as a further check, it felt solid and the cases would not join. There is still a smidge of endfloat on the cam.
It doesn't seem to matter what I do with the casing bolts and studs, it seems much the same whether they are loose or tight. Maybe it all just needs to bed together again? Also thinking about it, I wonder if the artic temperature in my garage is not helping.

[limeyrob]

You may be right about the temp, worth putting a hot air gun on it and seeing if it makes a difference.

[EDDIE SIMPSON]

when you tightened up the cam nut the woodruff key hasnt been pushed onto the bush. worth checking.

[Chriss750]

Managed to get back onto this today. With a little heat applied to the cases the camshaft turned easily. I'm a bit surprised to find such a simple solution, but it seems that low temp was the problem.
Eddie's reply prompted me to remove the cam pinion and check the key. I don't think I had it properly located in the keyway and it was preventing the pinion being pulled fully onto the shaft, hence the endfloat.
Hopefully the rebuild is back on track now.
My thanks to all who gave advice.