Valve seats are the machined sections of the cylinder head against which the valves seal when closed.
Often the valve seats are formed in steel rings (valve seat inserts) which are inserted into the cylinder head and held by an interference fit.
Valve seats are the machined sections of the cylinder head against which the valves seal when closed.
Often the valve seats are formed in steel rings (valve seat inserts) which are inserted into the cylinder head and held by an interference fit.
New Range Rover is still heavier than rivals
Jonathan Kershaw Sustainable mobility will change our relationship with the car forever
The XK120 launched Jaguar into the spotlight in 1948, and forged the company's early reputation for pace at a good price.