INSTALLATION INSTRUCTIONS --1075 North Ave. Sanger, CA 93657-3539 local: 559-875-8883 fax: 559-875-9883 toll free: 800-595-7016-- 90281 ST COILOVER GT Chrysler 300C 8cyl Type LX Congratulations! You were selective enough to choose a ST Coilover / SUSPENSION TECHNIQUES PRODUCT. We have spent many hours developing our line of products so that you will receive maximum performance with minimum difficulty during installation. Note: Warning: Warning: Reminder: Note: Note: NOTE: DO NOT begin installation if any part is missing. Read the instructions thoroughly before beginning this installation. DO NOT work under a vehicle supported by only a jack. Place support stands securely under the vehicle in the manufacturer s specified locations unless otherwise instructed. DO NOT drive vehicle until all work has been completed and checked. Torque all hardware to values specified. Proper use of safety equipment and eye/face/hand protection is absolutely necessary when using tools to perform procedures! It is very helpful to have an assistant available during installation. The KW Coilovers for automobile suspensions are designed for easy installation. If noted otherwise in these instructions, all suspension components are installed and removed in accordance with the manufacturer s specifications for installing and removing standard springs and damper components. Prior to beginning any installation work, please read the following carefully: 1. The suspension components must match the suspensions application specifications (spring and shock/struts identification numbers). 2. The suspension components may only be installed by trained technical personnel using the proper tools. 3. All instructions with herein, shall be thoroughly read prior to beginning any installation work. 4. Never use impact wrenches or guns to install or remove shock absorber piston hardware. 5. Never disassemble or cut open shock absorbers and/or shock absorber inserts. These contain oil under pressure. There is a danger of explosion. 6. Prior to driving on roads or highways it is recommended to test drive the vehicle in a remote location so that you can become accustomed to the revised driving characteristics and handling. The vehicle will handle substantially different now that it has been modified. 1
VEHICLE PREP NOTES 1. Open the ST Coilover kit and remove all of the contents. 2. Park the vehicle on a smooth, level concrete or seasoned asphalt surface and activate the parking brake. Block the REAR wheels of the vehicle with appropriate wheel chocks; making sure the vehicle s transmission is in 1 st gear (manual) or Park (automatic). 3. WE RECOMMEND the use of a vehicle hoist or lift when installing the suspension. If neither is available and jacking equipment will be used, make sure that the vehicle is secured with commercial wheel blocks and jack stands to ensure safety. 4. Using a properly rated floor jack, lift the front wheels of the vehicle off the ground. Place support stands, rated for the vehicle s weight, and in the factory specified locations. Refer to the vehicle Owner s Manual. Prior to lowering the vehicle onto the stands, make sure the supports will securely contact the chassis prevent personal injury and chassis damage! Make sure that the supports stands are properly placed prior to performing the following procedures. We DO NOT RECOMMEND using wheel ramps while performing this installation. GENERAL MOUNTING SPECIFICATIONS 1. As mentioned previously, only trained technical personnel using proper tools, are recommended to do actual installation. 2. IMPORTANT NOTE: If the vehicle is equipped with ride height sensors, they should be removed before removal of struts or dampers, otherwise damage may occur. 3. The struts should be removed as specified by the manufacturer s instructions. 4. Manufacturer recommended tools for removal of the original struts, or suitable spring compressor must be used in order to remove most factory mounted suspension systems. 5. Mount the complete suspension system as described on the following pages. 6. Never use impact drivers to install nuts on the piston rods as permanent damage may occur. It is imperative that you do not damage the piston rod surface, through the use of pliers, etc., as the smallest damage will result in seal damage and will not be covered under the warranty. 7. Stay within the lowering range specified in the table on the following page. Example: With a specified range of 20-60mm (.787in-2.36in), 40mm (1.57in) is your height adjustment range. 8. Install the suspension components in the vehicle as specified by the vehicle manufacturers in their documents and/or as described below. 9. Except as noted, all torque values must comply with the manufacturer recommended specifications. 10. After assembly and installation is complete, the vehicle should be rolled onto level ground. Once on level ground, measure the vehicle height and adjust to the customers requirements, within the prescribed lowering range. 2
CAUTION: Wheel hub center wheel arch maximum measurement in the following table must not be exceeded. Also take into account the minimum road clearances specified in the following table. 11. Once the final height is found, ensure that the set screw on each spring collar is tightened to prevent movement of the spring perch. On vehicles with separate shock/spring combinations, no set screw is necessary. CAUTION: Do not over tighten the set screw. Torque to manufacturers specs. 12. Vehicle alignment specifications should be set as close to the recommended manufacturers settings as possible. 13. Examine the clearance between the tires and the suspension over the full range of motion of the wheel. The minimum clearance between the suspension and the tire is 5mm (.196in). If this clearance is less than 5mm (.196in), wheel spacers may be necessary. With strut designs that are located close to the wheel, but that have no steering functions, use 100mm (3.93in) spacers on diagonally opposed wheels (e.g. front right, rear left). In this position, you must be able to achieve the minimum clearance required. You can also check the clearance between tire and body. CAUTION: With torsion beam trailing arm axles, this method is not sufficient. The wheel must be under full load as well as test driven to properly calculate the clearances of 5mm from any other components. 14. All components that are controlled by vehicle ride height (headlights, brake bias regulator, etc.) must be adjusted as specified by the vehicle manufacturer instructions and procedures. COILOVER ADJUSTMENT GENERAL INSTRUCTIONS 1. When adjusting the vehicle height, it is important to make sure that the threads are clean and free of debris. After initial cleaning, move the perch by 10mm (.393in) downwards, and then clean the area that you desire to adjust the perch (up or down). 2. During the height adjustment on separate shock and spring systems, remove the perch from the vehicle to adjust the height. 3. After adjusting the vehicle height, repeat steps 9 through 12 from the above the general mounting specifications. 4. In the area of the piston rod and the sealing package of the new and used damper might be oil and grease collected. This could either be caused by using a special black grease during assembling the washer or due to accumulation of streak oil. Furthermore, oil is used during assembling the cartridge and rod guide. 3
Technical data Coilover part number 27 016 Vehicle model Chrysler 300C 8 cyl. Type LX max. permissible Kront axle load: 1275 kg f r o n t a x l e r e a r a x l e Spring signature KW 20-60-80 / KW 2508 KW 2703 Coilover strut / Shock absorber signature 270 1008 270 1108 Approximate adjustment range* A in mm Approximate wheel hub center to fender edge measurement** B in mm Min: Max: Min: Max: 5 mm / 0,4 inch 35 mm / 1,4 inch 5 mm / 0,2 inch 25 mm / 1 inch Min: Max: Min: Max: 370 mm / 14,6 inch 400 mm / 15,7 inch 370 mm / 14,6 inch 390 mm / 15,4 inch Calculating the adjustment range: (Photos are examples only) Please enter the adjusted height of the modified car into the list Coilover part no Vehicle type Measurement A Wheel hub center to wheel arch Measurement B Front Rear Front Rear * The remaining thread measurement is approximate and is only intended as a general guide. Actual results may very due to various axle weights. ** IMPORTANT: The allowable measurement between wheel hub center and fender edge as indicated above, may not exceed this measurement when using standard fenders. 4
Front axle: Supplied coilover strut. Mount the supporting bearing of the production car on the supplied shock absorber. Tightening torque for the piston rod is 35 Nm (26 ft-lb). Please install the strut unit to manufacturers recommended settings regarding tightening torque and fixing specifications. Installed coilover strut. 5
Rear axle: Mount the rear axle adjustment between spring and chassis. The original spring support is not needed anymore. You have to remove this part to correct (screw up the threaded ring) the car height. Please install the damper unit to manufacturers recommended settings regarding fixing specifications. The rear axle shock absorber according to the car manufacturer installation instructions. Unless there is no bump stop in the delivery contents, the standard bump stop has to be used. The standard bump stop has to be in a good condition, otherwise it has to be replaced. 6
7