Specifications

Water Pump (Big Cam IV and New Big
Cam IV) 15 10
30 20
45 35
Note: Tighten the capscrews in the sequence shown.
Water Pump (88 Big Cam IV) 15 10
Idler Pulley Support Bracket 30 20
45 35
Note: The two capscrews which mount the idler pulley support bracket are longer than the other
four water pump capscrews.
Coolant Transfer Tube Hose Clamp 5 40 in-lb
(Big Cam IV and New Big Cam IV Only)
Air Compressor Coolant Tubes Tube Nuts 20 15
(Big Cam IV and New Big Cam IV)
Air Compressor Air Inlet Fitting Into the
Aftercooler 15 10
Air Compressor Air Inlet Tube Hose
Clamps 5 40 in-lb
(88 Big Cam IV)
Water Pump Belt (Big Cam IV and New
Big Cam IV)
• New Belt Tension 710 N 160 lbf
• Used Belt Tension 290-580 N 65-130 lbf
Note: A belt is considered used it if has been in operation for more than 10 minutes. If used belt
tension is below the minimum, tighten to the maximum value.
Idler Pulley Shaft Lock Nut 70 50
(Big Cam IV and New Big Cam IV)
Specifications Engine Assembly - Capscrew Torque Values
NT 855 Page 18-21
Torque Values
Part or Assembly Step N•m ft-lb