I agree that you don't have to cut the chain (although it might be time to replace it anyway).

If you can't find the order of cylinder head bolt removal for the M108 engine then I'd loosen them diametrically from the outside of each ends of the block inwards. (As generally tightening is made from the inner bolts outwards)

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!