Piston for 2001–2006 Hyundai Sonata / Kia Optima 2.7L G6BA 23410-37310
The piston assembly for the Hyundai/Kia 2.7L G6BA engine typically features a standard bore of 86.70 mm and is equipped with three piston rings (1.2 mm for the first ring, 1.2 mm for the second ring, and 2.5 mm for the oil ring).
Description
Piston Assembly Specifications (G6BA 2.7L):
Bore: Standard value is 86.70 mm.
Piston Ring Grooves:
1st Ring (Top): 1.20 mm.
2nd Ring (Middle): 1.20 mm.
3rd Ring (Oil Ring): 2.50 mm.
Piston Ring End Gap (Standard Value):
Top Ring: 0.20 – 0.35 mm (0.0079 – 0.0138 in)
Second Ring: 0.30 – 0.45 mm (0.0118 – 0.0177 in)
Oil Ring: 0.20 – 0.70 mm (0.0078 – 0.0275 in)
Piston Pin Diameter: 20.974 – 20.985 mm (0.8257 – 0.8262 in)
Piston-to-Cylinder Clearance: 0.02 – 0.04 mm (0.0008 – 0.0016 in)
Oversize Pistons: Typically available in 0.50 mm, 0.75 mm, and 1.00 mm sizes.
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