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Home >> Buick >> 1989 >> Riviera >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - 3.3L/3.8L PFI >> Torque Specifications
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Torque Specifications

TORQUE SPECIFICATIONS

Application Ft. Lbs. (N.m)
Fuel Line Nuts
Inlet Line (3.3L) (1) 22 (30)
Return Line (3.3L) 22 (30)
Fuel Rail Bolt (3.3L) 15-20 (20-27)
Throttle Body Bolt (3.8L) 11 (15)
INCH Lbs. (N.m) 
IAC Valve Housing 30 (3.4)
IAC Valve Retaining Screw 18 (2.0)
Pressure Regulator Retaining Bolt (3.3L) 49 (5.5)
TPS Retaining Screw 18 (2.0)
(1) On 3.3L, fuel rail inlet fitting must not be removed from fuel rail. Fitting is staked in place.