BMW 120i F20/F21 177hp N13B16A 2015-

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BMW 120i F20/F21 177hp N13B16A 2015-

BMW 120i F20/F21 177hp N13B16A 2015-

BMW 120i F20/F21 177hp N13B16A 2015- 

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BMW 120i F20/F21 177hp N13B16A 2015-

The BMW 120i F20/F21 carries the N13B16A in its highest state of tune, and it is the crankshaft line that is detailed here.

Big end and main bearings are offered as ACL RACE and KING RACING tri-metal shells, in standard size, in standard size with the wider HX clearance, then in +0.025, +0.026, +0.25 and +0.50mm for a reground crankshaft. The thrust washers, which take up end float rather than carry the journal, follow the same two brands.

Running clearance is measured with plastigage before reassembly; the size is never deduced from the look of the old shell.