Technical specifications (Hyundai Sonata Y3)

Characteristic	Nominal value	Limit value
Type	V-shaped
Number of cylinders	6
Cylinder diameter	91.1 mm
Piston stroke	76.0 mm
Working volume of cylinders	2972 cc
Compression ratio	8,9
Order of operation of cylinders	1-2-3-4-5-6
Idle speed rpm	700±100
Ignition timing at idle speed	5° ±2° before TDC
Valve timing
Inlet valve
Opening	19° before TDC
Closing	59° after BDC
Exhaust valve
Opening	59° before TDC
Closing	19° after BDC
Valve overlap	38°
Intake valve opening duration	258
Exhaust valve opening duration	258
Valve rocker arms
Inner diameter	18,910-18,928 mm
Oil clearance	0.01-0.04 mm	0.1 mm
Rocker shaft
Outer diameter	18,885-18,898 mm
Overall height	333.5 mm
Rocker shaft spring
Length in free state	55.2 mm
Camshaft
Drive mechanism	Toothed belt
Cam height	41.15-41.35 mm	40.65 mm
Neck diameter	33,935-33,950mm
Bearing clearance	0.05-0.09 mm
Longitudinal play	0.1-0.2 mm
Cylinder head
Non-flatness of the lower surface	Max. 0.05 mm	0.2 mm
Non-flatness of the collector installation surface
Intake manifold	Max. 0.10 mm	0.2 mm
Exhaust manifold	Max. 0.15 mm	0.3 mm
Valve bushing hole diameter
increased by 0.05 mm	13,050-13,068
increased by 0.25 mm size	13,250-13,268
increased by 0.50 mm size	13,500-13,518
Valve
Total length
Inlet	102.97 mm
Outlet	102.67 mm
Rod diameter
Inlet	7,995-7,982 mm
Outlet	7,960-7,940 mm
Chamfer angle	45-45,5°
Gap between the rod and the bushing
Inlet	0.03-0.06 mm	0.10 mm
Outlet	0.05-0.09 mm	0.15 mm
Valve spring
Height in free state	50.5 mm	49.5 mm
Effort	32.9 kgf/40.4 mm	32.9 kgf/41.4 mm
Piston		Max 4
Diameter (nominal)	91.07-91.10 mm
Clearance between piston and cylinder bore	0.03-0.05 mm
Piston ring groove width
№1	1.51-1.53 mm
№2	1.51-1.53 mm
Low removable	4.010-4.035 mm
Repair pistons	Increased size by 0.25mm, 0.50mm 0.75mm, 1.00mm
Piston rings
Number of rings on a piston	3
Compression rings	2
Oil scraper ring	1
Type of compression rings
N1	Cylindrical, steel
N₂	Wedge-shaped, special cast iron
Oil scraper	Three-element
Gap in the ring lock
N1	0.30-0.45 mm	0.8 mm
N₂	0.25-0.40 mm	0.8 mm
Side oil scraper ring	0.30-0.90 mm	1.0 mm
Lateral clearance of rings
№1	0.03-0.09 mm	0.1 mm
№2	0.02-0.06 mm	0.1 mm
Repair rings	Large size 0.25mm, 0.50mm, 0.75mm, 1.00mm
Connecting rod
Piston pin pressing force	7,500-17,500 N
Gap on the pressure-bearing surface	0.10-0.25 mm	0.4 mm
Crankshaft
Main journal diameter	59,980-60,000 mm
Diameter of connecting rod journals	49,980-50,000 mm
Neck irregularities	Max. 0.03 mm
Taper of necks	Max. 0.005 mm
Longitudinal play	0.05-0.25 mm
Main bearings
Gap	0.02-0.048 mm	0.1 mm
Cylinder block
Cylinder diameter	91.10-91.14 mm
Non-flatness of the upper surface	Max. 0.05 mm
Out of roundness and taper	Max. 0.02 mm
Pressure reducing valve spring
Length in free state	43.8 mm
Effort	3.7 kgf/40.1 mm
Oil filter
Type	Full flow with replaceable filter element
Engine oil pressure	80 kPa or more (Conditions: oil temperature 75-90°C)