VALVE REPLACMENT & UNLEADED CONVERSION FOR CYLINDER HEADS

At Statfold Engineering we can offer a high standard of workmanship when it comes to unleaded conversion. If you own a classic car, Statfold Engineering can offer an uleaded conversion for your cylinder head. For an unleaded conversion we need to change the exhaust valve seats with the harder seats and we would advise fitting new exhaust valves as well.

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Valve Seat Replacement

The valve seat is the surface that the intake and exhaust valves sit on when the valves are closed. The valve seat is a vital part of the combustion procedure. If the valve is not seated properly it can cause combustion gasses to leak so reducing compression.

Over time a valve seat can be worn which can reduce its compression. If it is not possible to resurface the seat due to the excessive wear Statfold Engineering can remove and fit a new valve seat.

Valve seats are an important part of altering engines to run on unleaded fuel. Whe doing a conversion, you should change the exhaust seats with a harder wearing material due to the increase of temperature during the combustion procedure.

Valve Guide Replacment

With each inlet and exhaust valve there is a valve guide fitted into the cylinder head. The valve guide connects the valve to the valve seat so it creates suitable contact between them. Guides also serve to conduct heat away from the exhaust valve to the cylinder head.

If an engine suffers a disastrous failure or cam belt failure, the valve guides can crack due to the valve bending. If this is the case, Statfold Engineeing can remove the broken valve guides and change them with new guides.