valve lapping tips

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Cylinder head valve lapping ! | Rx Mechanic

Here's an easy trick to make lapping valves a piece of cake. Normally you use the suction cup stick and do your best impression of starting a fire by hand. Yuk, tons of effore and the suction cup keeps falling off. Depending on access I will put the tip of the valve in my drill and use the drill to spin the valve, key factor here is to control the speed. In this case the DOHC cyl. head gave little access to the calve, so I used a piece of vacuum hose to allow me to reach and spin the valve. Cont