Engine wont turn over

Car is a 1963 Vauxhall Velox with a PB engine. engine is fully torn down. All that we did was put different pistons in. Original con rods, bearings, caps. When we tighten down the caps onto the crank the engine won't turn over. Any help at all would be appreciated, cheers.

u/Agitated_Dot8294 — 1 month ago

Engine started making some knock knock jokes this morning. Was completely fine last time i drove it. Sat for a few weeks, took it for a small drive and came back to this. Any ideas where it's coming from? Cheers

u/Agitated_Dot8294 — 6 months ago