150 c.i. inline-four

This engine is usually described as 'primitive'

But it was quite sophisticated for it's time !

Aluminium block with replacable iron liners (replace them along with the pistons - and you have a brand new engine)

Aluminium head

Aluminium intake manifold

Cartrige type full-flow oil filter

Exhaust gas recirculation system to improve ecological issues

 

But also it has primitive solid adjustable valve lifters and manual choke

Done