F 150 4WD Pickup V8-281 4.6L VIN W EFI (1997)
Heater Core: Specifications
Heater Core Bracket Screws..........................................................................................................................................................1.5-2.5 N.m (13-22 Lb/In)
Heater Core Outlet Bracket Screws................................................................................................................................................1.5-2.5 N.m (13-22 Lb/In)