Delphi TD4649W Coil Spring Insulator - Front Upper

Delphi Coil Spring Insulator for Front Upper Suspension

The Delphi TD4649W coil spring insulator is designed to provide reliable suspension support for select Buick, Cadillac, Chevrolet, GMC, Oldsmobile, and Pontiac vehicles. Made from durable black rubber, this specific-fit insulator ensures proper cushioning and noise reduction in the front upper suspension assembly.

• Material: High-quality rubber for durability and flexibility
• Color: Black
• Inside Diameter: 3.98 inches
• Outside Diameter: 5.67 inches
• Thickness: 0.28 inches
• Width: 5.67 inches
• Shape: Round design for precise fitment
• Position: Front upper suspension
• Item Grade: Standard replacement part
• Specific fit for multiple GM makes and models

Durable Rubber Construction and Precise Dimensions

The TD4649W coil spring insulator is engineered from robust rubber material that absorbs vibrations and reduces noise generated by the coil spring during vehicle operation. Its round shape and exact dimensions—including a 3.98-inch inside diameter and 5.67-inch outside diameter—ensure a secure fit on the front upper suspension coil springs. This part is a standard replacement designed to maintain suspension integrity and ride comfort on compatible vehicles.

Compatible Vehicles and Applications

This Delphi coil spring insulator is specifically designed for front upper suspension use on a range of GM vehicles. Compatible makes include Buick, Cadillac, Chevrolet, GMC, Oldsmobile, and Pontiac. Models supported include the Chevrolet C1500, C2500, C3500, S10, S10 Blazer, and S15 Jimmy; Buick Century, LeSabre, and Regal; Cadillac Fleetwood and DeVille; Pontiac Firebird and Grand Prix; and many others such as the Oldsmobile Cutlass and Delta 88. The TD4649W part number ensures you receive the correct insulator for these applications.

Common Suspension Issues Addressed

• Reduces coil spring noise and rattling in the front upper suspension
• Prevents metal-to-metal contact between coil spring and mounting points
• Improves ride comfort by cushioning suspension components
• Helps maintain proper coil spring alignment and positioning
• Minimizes premature wear on suspension parts

Installation Notes and Tips

Installation of the Delphi TD4649W coil spring insulator requires removal of the front upper coil spring assembly. Ensure the vehicle is securely lifted and supported before beginning work. Clean the coil spring seat area thoroughly to remove dirt and debris. Position the insulator correctly on the coil spring to avoid misalignment. It is recommended to inspect related suspension components during installation for wear or damage.

Quality Assurance and Warranty

Delphi manufactures the TD4649W coil spring insulator to meet or exceed OEM specifications for material and fitment. This standard replacement part undergoes quality control testing to ensure durability and performance. While specific warranty details may vary, Delphi typically offers coverage against manufacturing defects to provide confidence in the product's reliability.