The addition of a synthetic grease to the jounce bumper will prevent any noise to the driver when the strut contacts the jounce bumper. Fluorocarbon Gel is also recommended in this application because of its water washout capability, elastomer compatibility, and wide temperature performance. A strut or shock uses an internal hydraulic oil to lubricate bearings and seals while providing a damping action to compensate for road disturbances.
As a strut or shock is actuated, the exchange of oil through valves slows the action, providing the required damping. The choice of a correct oil will reduce friction on internal parts and allow the strut to perform properly over the wide temperature ranges needed in automotive. If you are unable to reach any areas with grease, then use the long nozzle oil can contact with a syringe.
You can also use aerosol oil can as a substitute for the syringe. Let us replace the wheel now. With the help of jack, raise the car and remove the jack stand easily. Slowly lower the car and repeat the same steps for the front strut of your car side. We need to raise the car with the help of a jack stand and remove the wheels. Use a bright flashlight to see the clear picture of the under areas of the car. Specifically, look at the bushings, Struts, and shocks.
Carefully examine each bolt and placement of the rubber bushings. There are possibilities of having cracks on the rubber bushings; you can also find them in a pulled away situation or slight orangish shade can be coated. This means that the rubber bushings are damaged and need to be replaced.
You can also find the shocks wherein there is leakage of oil. The leakages can be fresh and also years ago. Due to this, squeaking takes place in the shocks. Press on the car and pin down the source of squeaking. Rubber bushings serve an important role in front ends, providing anchor points for struts and stabilizer arms.
As they age, they sometimes can develop annoying squeaks even though there may be nothing fundamentally wrong with the bushing. The squeak you describe is likely to be coming from the upper strut mount bushing, which anchors the strut and allows the strut to rotate as you turn the wheels. In some cases, there is a steel sleeve running through the bushing or a bearing inside the bushing, either of which allows the strut to rotate freely.
The squeak--more often described as a moan--also can occur if the sleeve or bearing binds up on the strut. If you have a helper turn the wheel, you may be able to hear or feel the exact location of the squeak. Be careful with your fingers.
Once you have located the squeak, you need to lubricate it. Do not use oil or a petroleum-based product, because it will cause the rubber to swell and then to disintegrate. Petroleum-based lubricants include WD, Boeshield and a number of other sprays. You can use two things safely: a silicon spray that specifically says on the can that it is compatible with rubber; or rubber lube, which is sold in auto parts stores and used at tire shops to lubricate the rim of tires being mounted on wheels.
Generously spray the lubricant into the bushing.
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