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Replace a Spare part Bonnet struts – a defective one or if the limit of use has been already reached. Find out useful information about Bonnet struts
A bonnet strut is a device which smoothly raises the bonnet, reliably holds it in the upper position and absorbs vibrations when the bonnet lid reaches its full-up or full-down position.
5 tips for bonnet strut operation
- Opt for gas bonnet struts when selecting the components, because they are able to withstand heavier loads and operate more effectively in severe weather conditions.
- Do not move the bonnet to its upper position by hand - it should be moved due to action of the strut.
- In cold season open the bonnet only after the engine is warmed up. This should be performed smoothly, without jerks and abrupt movements.
- Selecting the spare part, take into account the design features and operation specifics of the car. For example, if the bonnet lid is heavy, choose the component with higher supporting power. Consider also the length of the bonnet strut. It should allow to open the bonnet up to the height comfortable for car servicing.
- Obey safety requirements for strut operation: in order to avoid injuries, do not disassemble the part, do not allow its overheating or mechanical damages.
Defects of the bonnet strut, their causes and signs
- Depressurization. It often results from incompliance of exerted loads with the component technical characteristics (too short or too long strut, insufficient supporting power), or improper use of the component in severe weather conditions. In this case the component stops performing its function, and doesn’t hold the bonnet in the opened position.
- Deformation. It occurs as a result of mechanical force applied to the component, for example, heavy impact. Such damages are visible with the naked eye and are incompatible with proper operation of the component.
- Jamming. It may be caused by oil freezing in cold weather or by production defect. In this case, the bonnet lid cannot be fully opened or closed, depending on the position in which the part is jammed.
You can buy bonnet strut in Buycarparts.co.uk online-shop. A wide assortment will allow you to select a spare part suitable for any car model.
FAQ: Frequently asked questions
This component is a double chamber cylinder with a piston rod and a piston moving inside. The piston has a valve which regulates the pressure in both parts of the component. When the boot lid is closed, the piston compresses the gas in the upper cylinder. As the lid is opened, the piston is pushed out and as a result the boot lid is lifted.
In a pneumatic shock absorber, the piston at a certain part of its path reaches and passes the channels in the cylinder wall, as a result of which the gas flows from the high-pressure part into the low-pressure part. The pressure in both parts is gradually equalised. At the furthest point of extension, the piston rests against a cushion of residual gas and stops moving.
A hydropneumatic component differs in that it contains some amount of oil. This helps the boot lid to stop its movement more smoothly.
For this you will need:
- a flathead screwdriver;
- a set of open-end spanners;
- supports for securing the boot lid.
The specific procedure can be found in your car owner’s manual. Usually, it includes the following steps:
- Lift the boot lid and secure it with the supports.
- Gain access to the fasteners of the struts. Remove the boot trim panel if necessary.
- If the component is secured with a clip, you need to push the clip off and remove it from its slot. If the component is attached directly to the car body elements, unscrew and remove the fasteners.
- Prime the new part before installing it. For this, press the piston rod all the way down and let it return to its initial position. Do this 5–10 times.
- Install the new part to its mounting seats.
- Secure the part and check to see if it works properly.
These parts cannot be repaired. They should be replaced if you can see evidence of oil leaks or corrosion. Also note that since both struts wear at the same rate, they should always be replaced in pairs.