Lotus Esprit Crankshaft Journal & Crankpin Diameter Specs - Manual Page

This scanned service manual page covers crankshaft removal, inspection, and refitment procedures, uploaded in association with a 2000 Lotus Esprit. It notes that the main bearing caps are a tight fit in the crankcase and that a special puller tool (T000T1 369) is available to aid withdrawal. It cautions against displacing bearing shells from the caps and explains that crankshaft thrust washers are located on either side of the no.4 main bearing, and should be labeled as removed. The inspection section (circled by the uploader) gives key crankshaft measurement specifications: standard main journal diameter 64.955–64.968 mm (2.5573–2.5578 in) and standard crankpin diameter 47.756–47.772 mm (1.8802–1.8808 in). It also states that main journal and big end bearing shells are available in 0.25 mm and 0.50 mm undersizes. The Crankshaft Refitment section instructs fitting upper main bearing shells with locating tabs in their slots; upper shells have an oil hole and groove, while lower shells in the caps are plain. All five main bearings use identical shells, but original shells should be refitted in their original positions. A partial illustration labeled 'Main bearing cap' appears at the top of the page.