As we've now got the same figure of 48Nm for the 2.0 JTD engine from the Peugeot manual, the Fiat eLEARN manual and Autodata, that should be the correct torque, so the extra 75° shouldn't be necessary.
I'm not familiar with the 2.0 JTD engine but when I replaced the clutch and dual mass flywheel on my 1.9 JTD, the bolts had a combined locking/sealing compound on them. The sealant was required to prevent engine oil leaking through the threads in the end of the crankshaft in to the bell housing. I bought new bolts for it rather than try to get the old stuff off and re-apply the correct compound. New bolts came with the compound already applied.