Never done them on my series, but done them on a Mini cold.
The plate on the rocker cover says Hot or cold, and after all it is a old land rover engine and not a Highly tuned F1 engine. The hot or cold is going to be minimal.
POS - I'm really worried about my engine. I have a Series 2A with the 2.25 Liter petrol engine. I've never taken the valve cover off, and I'm fairly new to maintenance (I did change the exhaust manifold once a long time ago on my previous 2A). When I start the engine from cold, I hear a clattering like, clackety, clackety, clackety..., for a few seconds , maybe one or two seconds. Then, idles fine with cold start until warmed up. As I drive in 2nd gear and the revs increase - to just before time to switch to 3rd, I hear that same clattering. Then, I'm 3rd and fine, no clattering, driving in third at normal revs and speed. Okay, I accelerate and then when the revs are high - just ready to go into 4th, I hear the rapid machine gun like clattering. Has this anything to do with valves, or is it rod knock, or something worse? I know it's hard to say here on the forum, so any ideas would be helpful.... there should be metal to metal contact, and even more so when the engine is cold. The further you can open the valves, the more efficiently your engine will run. It should clatter and tap when cold and then smoothen out when its warmed up. It does improve your efficiency and its oe of the reasons why you'll find your landy moves a bit quicker once its warmed up!
-Pos
Nice video here from rimmer Bros setting valve clearances
inlet manifold ? are you talking about setting tappets if so they are all 10 thou cold ,all landy 2.25 engines are the samein the video at 7:50 he says inlet manifold is 10thou and exhaust is 25thou, thats 25mm and 63mm
He also says some of them are all the same and some not ... how do we find out?
Simon