when cold outside mine also does this as with any oil it tends to thicken up when cold. if the noise disappears in a few seconds you're likely just fine. kinda watch your oil pressure gage when it shoots up it should quit in a second or 2. this i feel would be normal.
just a note on the chain. the rails, oil tubes and tensioner is a must somewhere over 100k but that doesn't mean the chain is no good. you can use offset keys to re-establish zero on the balancer for timing. one of our resident experts came up with a formula on his chain and plans on running it to 200k. but if you're doing the work the chain is only about 70$ and maybe an hour or so to replace.
if your car has had good maintenance you could see it go 140 or 150. of course some have broke at the mileage you've got now.
1972 350sl Red/Blk 117k
1988 420sel charcoal/Blk 140k
1987 420sel gold/tan 128k
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