Cylinder head valve guide renewal – per piece

Cylinder head valve guide renewal – per piece

Renewing a valve guide is a complex process that requires a great deal of expertise and the appropriate tools and machines. First, the old valve guide is pressed out and a new base bore is created. The new valve guide is mounted in a special way: By cooling with liquid nitrogen to -196 °C and heating the cylinder head, the valve guide is shrunk to fit precisely, ensuring a perfect and permanent, tight fit.

After that, the valve guide is honed to size on the inside and given a cross-hatch pattern. Finally, the valve seat insert is precisely machined on a Serdi 100 contour milling machine to achieve the optimum shape and sealing effect. The result is an exact, long-lasting valve guide for maximum engine performance.

• Press out the old valve guide
• Create a new base bore
• Heat the cylinder head in a heating furnace
• Shrink valve guide with the help of liquid nitrogen (-196°C)
• Hone the inside of the valve guide to the final dimension and create cross-hatch grinding
• Precisely machine the seat ring on the SERDI 100 contour milling machine
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Note: In the case of multi-cylinder engines, the price is reduced if the valve guides are replaced and machined at the same time, possibly together with the valve seat inserts. Please obtain a separate quotation for this.

The valves and guides are not included in the scope of delivery.