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OVERVIEW OF B5254T3
Crankshaft, Main Bearings
Stroke 93.2 mm; forged; weight 21606 grams; connecting rod pins:
65.00 mm.
The crankshaft is somewhat heavier than on the 2.5 LT, B5254T2 (21559g) due to the different
balancing for pendulum suspension motor mounts.
Both the upper and lower main bearings are aluminum.
Connecting Rods, Connecting Rod Bearings
Bigger connecting rods, forged using split caps. Center to center length 143 mm; weight 644 grams.
Both the upper and lower bearings are copper-lead alloy.
Pistons
Graphite-coated pistons
Wrist pin diameter/length = 21 mm/60 mm
Weight 412 grams with piston rings, snap rings and wrist pin
Piston weight alone 290 grams.
Graphite-coated pistons have a play of approximately 0.04 mm between the piston and cylinder before
the graphite coating. The graphite coating is approximately 0.01 mm on either side of the piston. The
graphite coating wears but never completely disappears as it penetrates the outer layer of the piston.
50.00 mm; main bearing journals:
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