Sheared Flywheel Bolt Removal - Weld Nut Method on 7M Crankshaft

Engineintermediate✓ OP Confirmed

Problem

During a 7M engine swap using a replacement bare block/head from a Cressida, a sheared-off flywheel bolt was discovered stuck in the crankshaft flange of the new engine, preventing flywheel and clutch installation.

Flywheel bolt sheared off flush or near-flush with crankshaft flangeUnable to mount flywheel to crankshaftBroken bolt stub remaining in crankshaft bolt hole

Root Cause

A flywheel bolt had been previously over-torqued or seized in the crankshaft threads and sheared off, leaving the stub stuck in the crankshaft flange of the donor engine.

Confidence

High confidence — Original poster confirmed this resolved the issue

View Original Thread →Posted September 2023 on SupraForums.com