How to replace a dryer drive belt | Repair guide Aug 01, 2014The video below shows how to replace a broken drive belt in a gas dryer, but the repair steps are the same for electric dryers. This repair procedure covers Kenmore, Whirlpool, Maytag, Amana, Roper, Crosley and Estate dryers with a Subaru FA20D Engine - australiancarews The FA20D engine had an aluminium alloy cylinder head with chain-driven double overhead camshafts. The four valves per cylinder – two intake and two exhaust – were actuated by roller rocker arms which had built-in needle bearings that reduced the friction that occurred between the camshafts and the roller rocker arms (which actuated the valves).