Do you need a torque wrench to tighten the bolts on the rocker arms (lifters), after putting on the new valve seals and springs?

Cheers.

PS: If yes, does anyone know the torque specs for a 1989 190e 2.6L?

15 foot pounds

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'93 300E 3.2
'05 GMC Yukon XL 4x4
'05 Polaris SP500 H.O. LE

Sweet, thanks.