Ariel Square Four Service Notes


Everything you need to know and then some.

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An in-depth, photo-filled, 9 page article PDF on one of the coolest motors ever. From cast iron versions right through to the last all alloy models this article breaks down everything you need to know when stripping and rebuilding these punchy motors. Earlier motors had a few design flaws that didn’t do the motors any favors and you’ll find out what to keep an eye out for. There’s tons of great pictures and more specifications than you can poke a stick at. It covers everything from the surprisingly dainty sludge trap to camshaft bush dimensions. If you’ve got one of these in the shed then this article is a must. And if you’re on the hunt for one then even better. This will school you on what to look for and what to avoid.