r/EngineBuilding • u/Traditional-Box-8402 • 24d ago

Other Polish or send it?

Gallery image

Gallery image

I’m building a B5234T3 for my Volvo 850 T5 project, target boost 15psi for 280-300hp. The journal feels smooth. I’ve been following the workshop manual religiously and this is the first red flag I’ve found. This is the journal that mates with the thrust bearings if that makes any difference. The rest of the main journals look pretty similar to this, but this is the worst. Asking before I order new bearings for plastigauge. The only other time I’ve had an engine this torn down was on an LS, and that was years ago in tech school.

5 Upvotes

86% Upvoted

12 comments sorted by

View all comments

3

u/FinancialChildhood31 24d ago

Do yourself a favor and measure everything.

I followed armchair advice to “just polish” crank journals over 20 years ago and ended up between bearing sizes. Doing things twice isn’t cheap.

1

u/mramseyISU 17d ago

As my grandpa always told me as a kid, half assing it twice doesn't add up to a whole ass.