That explains why I can't see anything about them in the manual then.
I was also wondering wether or not I should replace the crankshaft seals, the engine has been sat outside for the past 3 years (it's been covered over well and kept dry and turned over by hand regularly) but I'm not sure how well the seals hold up, thought they might have gone a bit brittle. They were only about a year old when I removed the engine from the car 3 years ago.