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If your car still requires you to put the key in the ignition switch, make sure you don’t hang anything from that keyring other than the fob; the weight of your house keys can wear down the ...
The common valve spring system is satisfactory for traditional mass-produced engines that do not rev highly and are of a design that requires low maintenance. [1] At the period of initial desmodromic development, valve springs were a major limitation on engine performance because they would break from metal fatigue.
Stiffer valve springs can help prevent valve float and valve bounce but at the expense of increased friction losses, higher stresses, and more rapid wear in the valvetrain. Various techniques have been used to offset the effect of stiffer springs, such as dual-spring and progressive-sprung valves, roller-tipped tappets, and pneumatic valve ...
Bronze is commonly used, as are various iron alloys; a balance between stiffness and wear on the valve is essential to achieve a useful service life. The clearance between the inner diameter of the valve guide and the outer diameter of the poppet valve stem is critical for the proper performance of an engine.
FILE - A Nissan logo is seen on a car at its showroom in Tokyo, Feb. 21, 2023. Nissan is recalling more than 809,000 small SUVs in the U.S. and Canada, Tuesday, Feb. 28, because a key problem can ...
Pressurized air is pumped into this cylinder which then causes the piston/retainer to rise to the top of cylinder, causing the valve to form an airtight seal with the seat. The compressed gas then becomes the spring, so to speak, but does not have the same traits as springs do at elevated rpm. A small light spring is sometimes fitted between ...
Like anything else relying on a battery, your car key fob can die—often at the worst time. Thankfully, these batteries are easy to replace. The post How to Change the Battery in Your Car Key Fob ...
However, many new vehicles have been equipped with so-called "keyless" systems, which replace the key switch with a push button that also requires a transponder signal. The ignition locking system may be sometimes bypassed by disconnecting the wiring to the switch and manipulating it directly; this is known as hotwiring .