After three decades of production, the Subaru EJ20 engine is coming to an end. To mark the occasion, Subaru has released a video of how they assemble the boxer four that has powered everything from speed record Legacys to S-series … Continue reading →

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I've got a question... is it me or....??

At 6.28 min. they put on the head on one side, without the pistons on..  and at 7.04 min.  they put in the pistons? how do they put in the piston pin ???

EJ motors (and other water cooled flat engines) have service ports on the sides of the case for piston pin install. It has to be done this way because the rod bolts are inaccessible once the case is assembled. I imagine flat-sixes are even more fun...

If it wasn't clear, the piston pin is inserted into the service port and installed into the piston and rod, which must be in alignment.

Yeah.. later on i saw the suspicious holes in the sides of the engine casing...

 

Honda does it different in the Goldwing 6 cilinder engine..  (around 8th min.)

 

If you want to see the rest..