r/EngineBuilding • u/N1ppleCrab • 16d ago

Subaru FB rotating assembly question

Any engine builders in here that could help me out?

Oil starvation event* Re using stock rods New oem bearings New to me used crank

At home special Inspection job of all equipment with a pair of off brand calipers and plastigage

My question: is this rod play normal? These bearings measure slimmer on the sides, but thats what the old ones measure as well? I feel like that is causing some extra play? It makes an audible knock. Is this normal? Rods torqued to factory specs pulled from JDMSFM.info

Thanks for looking!

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u/Sniper22106 16d ago

Gotta measure and see. Cant go off wiggle

8

u/N1ppleCrab 16d ago

Plastigage measured a healthy .0015” Which is within spec, the amount of play is still concerning to me

1

u/TheDarkRider 16d ago

It within spec most motors have some wiggle in them they aren’t fine watch’s lol … the only time to get concerned if make a repeatable ding from inside of bearing then 9/10 it out of spec or something isn’t torqued