lock Warranty Information keyboard_arrow_down
Moog fulfills their warranty through their individual dealers. That means that in order to receive warranty support, you will have to refer back to the original dealer you purchased the part from. Be sure to check the dealer's warranty support before you buy the part to make sure that they will properly support the warranty. If a dealer will only refer you back to the manufacturer in order to receive warranty support, then you may not actually have any warranty at all.
WARRANTY:
Moog Premium Steering Components carry a Limited Lifetime Warranty. Moog R-Series Control Arms, Hub Assemblies, and Strut Assemblies carry a 3 Year Warranty.
Moog warranties their parts to be free of defects in materials and/or workmanship during these timeframes as measured from the date of purchase.
If a Moog part should fail due to materials or manufacturing defect while under warranty, we will provide a replacement of the part upon return of the defective part.
Wearable RUBBER parts are not covered under warranty (Dust boots, bushings, bump stops, etc.)
Front Coil Springs - Chevrolet Impala - MOOG moog-658a
Moog's Coil Springs
Designed to be more than OE replacements, Moog's coil springs come with a variety of shapes and ends. This selection, combined with Moog's lifetime warranty handled right here at DST, lends security to whichever choice you might make. While they are certainly higher quality than the OE springs, each of Moog's coil springs were designed to still have the same spring rate. Having the same spring rate allows for an easier install and a more accurate restoration for your vehicle's ride.
End Type
Coil Springs have three types of ends: Square, Tangential and Pigtail. It is important that you select a coil spring that matches BOTH your end types, otherwise the coil spring won't fit. Your OE coil spring could have the same type ends, or a combination of both.
Type 1: Squared
With a Squared end, the final coil is bent back to touch the coil before it. The easiest way to know if you have a squared end is to stand the coil spring straight up. A squared end will let the spring sit flat on the ground and stay standing.
Type 2: Tangential
A Tangential end looks like it would just keep on going forever if the spring continued. The last coil is not bent back and it is not the pigtail (see below). Instead, the tangential coil spring looks as though a normal coil was just cut, otherwise, it would have kept winding on forever. If you tried to stand it up straight, it would fall.
Type 3: Pigtail
The Pigtail is probably the easiest to identify. Its defining characteristic is the pig tail shape at the end. The final coil is squared off, but is a much smaller diameter than the rest of the spring.
Spring Type
Moog offers two types of springs for a universal fitment: Constant Rate and Variable Rate.
Constant Rate
Moog Constant Rate coil springs return your vehicle to the original specifications. The rate at which the spring compresses and rebounds remains constant regardless of the amount of load on the spring. These coil springs are heat treated, have a weather resistant finish and use a urethane protective tube.
Variable Rate
Moog Variable Rate coil springs can be used as an original replacement or an upgrade to carry heavier loads. The resistance changes as the spring compresses, becoming progressively stiffer as the load on the springs increase. The springs include a "comfort range" with tightly spaced coils to give a smooth ride, and include a "load range" with widely spaced coils to minimize deflection and maintain chassis height when the vehicle load increases.
question_answer Customer Questions and Answers
- Question:
- Are the 658A a factory ride height? Or a lowering spring.
- Answer:
- All Moog springs are OEM replacements. Not lift or lowering springs.
- Question:
- What are all the specs for 658A springs?
- Answer:
- Here is the specs that Moog lists in their on-line catalog: Spring Type Constant Rate End 1 Type Tangential End 2 Type Tangential Wire Diameter (IN) 0.68 Wire Diameter (MM) 17.40 Spring Color Black Front Spring Outside Diameter (IN) 5. .190 Front Spring Relaxed Length (IN) 16.89 Front Spring Relaxed Length (MM) 429.00 Front Spring Compressed Length (IN) 11.81 Front Spring Compressed Length (MM) 300.00 Rear Spring Relaxed Length (IN) 16.89 Rear Spring Relaxed Length (MM) 429.00 Rear Spring Compressed Length (IN) 11.81 Rear Spring Compressed Length (MM) 300.00 Rear Spring Outside Diameter (IN) 5.190 Part Description Coil Spring Set ID - Inches 3.81 ID - MM 96.80 Bar Diameter - Inches 0.68 Bar Diameter - MM 17.40 Spring Rate - Lbs Per Inch 404.00 Load - Lbs 2052.00 Installation Height - Inches 11.81 Installation Height - MM 300.00 Free Height - Inches 16.89 Free Height - MM 429.00 ...see more
- Question:
- What is the spring rate on the springs 658a?
- Answer:
- Spring Rate lbs per inch is 404