Shop 1986 Buick Century Coil Spring Insulator (Front, Lower). Express 2500; Lower (171MM OD). Express OD, Suspension, Springs - OEM Buick Part # 25751134

Insulator. Spring. Seat.
Coil Spring Insulator. Spare. Coil. Dust cover.

Coil Spring Insulator

Fits Express 1500, Express 2500, Express 3500, Savana 1500, Savana 2500, Savana 3500

Express 2500; Lower (171MM OD). Express 3500; Lower (171MM OD). RWD. Savana 2500; Lower (171MM OD). Savana 3500; Lower (171MM OD).
Suspension Coil Spring - Repair or Replace
Your coil springs are not especially prone to failure, but if they have been cut, clamped, or heated to have the vehicle lowered, your might benefit from replacing the strut springs. Excessive rust can make the springs more prone to failure. Contact your local service department to have your suspension system evaluated.