**This is a replay from the old podcast series lost to the internet**

Original upload date: 27/10/2020

There are three types of valve-train used in petrol engines and all three are still produced new. This a guide we're going to discuss OHV vs SOHC vs DOHC, the good the bad and the ugly of each.

I've been lucky enough to own and fiddle with variants of all three. Bear in mind this is a generally overview and there will always be examples that push the limits or are highly efficient.

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