Do not compress the spring more than necessary.
Tightening torque:
107.8 - 117.7 N.m (11.0 - 12.0 kgf.m, 79.6 - 86.8 lb-ft)
53.9 - 58.8 N.m (5.5 - 6.0 kgf.m, 39.8 - 43.4 lb-ft)