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The valve seat is the surface that the intake and exhaust valves sit on when the valves are closed. The valve seat is a critical component in the combustion process, if the valve is not seating correctly it can cause combustion gasses to leak reducing compression. As well as this important operation the valve seat also serves to transfer heat away from the valves into the cylinder head.
Over time a valve seat can become worn which can reduce its effectiveness and lead to a loss of compression. If we are unable to resurface the seat due to the extent of the wear, we can remove it and fit a new valve seat insert.
If a valve seat is not available for your vehicle, we are able to manufacture valve seat inserts to suit using blanks. If the valve seat is cast into the cylinder head, we are able to machine it out using an I.D.L and then manufacture seats to fit.
Valve seat replacement is also an important part of converting engines to run unleaded fuel. When doing a conversion you have to replace the exhaust seats with a harder wearing material due to the increase of temperature during the combustion process.
We are able to get valve seats in a range of sizes that we can machine to fit almost any vehicle on the road.