Originally Posted by http://www.dunebuggyarchives.com/forum/topic_show.pl?tid=1708

The SOHC EJ Subaru boxer engines were non-interference engines through 1996, run by a single timing belt driving both cams (both sides of the engine) and
the water pump. Because they are non-interference engines, if the timing belt fails, the engine of the models up to 1996 will not be destroyed. The oil
pump is driven directly from the crank shaft and the waterpump by the timing belt. All DOHC and 1997-up SOHC EJ engines are interference engines, if the
timing belt fails the engine will likely be destroyed or the valves & piston will be heavily damaged.