Specifications (Hyundai Sonata 3 1993-1998: Power unit: Engine repair V6 SOHC)

Characteristic	Rated value	limit value
Type	V-shaped
Number of cylinders	6
Cylinder diameter	91.1 mm
piston stroke	76.0 mm
Cylinder displacement	2972 cu. cm
Compression ratio	8,9
The order of operation of the cylinders	1-2-3-4-5-6
Idle speed rpm	700 ± 100
Ignition timing at idling speed	5°± 2°BTDC
Valve timing
Inlet valve
Opening	19°BTDC
closure	59°after BDC
Exhaust valve
Opening	59°BTDC
closure	19°after BDC
valve overlap	38°
Intake valve opening time	258
Exhaust valve opening time	258
Valve rockers
Inner diameter	18.910-18.928 mm
Oil clearance	0.01-0.04mm	0.1 mm
rocker shaft
Outside diameter	18.885-18.898 mm
Overall Height	333.5 mm
Rocker shaft spring
Free Length	55.2 mm
Camshaft
Drive mechanism	Toothed belt
Cam Height	41.15-41.35mm	40.65 mm
Neck diameter	33.935-33.950mm
Clearance in bearings	0.05-0.09 mm
Longitudinal play	0.1-0.2mm
cylinder head
Non-flatness of the bottom surface	Max. 0.05 mm	0.2mm
Non-flatness of the installation surface of the collectors
Intake manifold	Max. 0.10 mm	0.2mm
An exhaust manifold	Max. 0.15 mm	0.3mm
Valve Boss Bore Diameter
size increased by 0.05 mm	13,050-13,068
increased by 0.25 mm size	13,250-13,268
size increased by 0.50 mm	13,500-13,518
Valve
total length
Inlet	102.97 mm
High school graduation	102.67 mm
Rod diameter
Inlet	7.995-7.982 mm
High school graduation	7.960-7.940 mm
Chamfer angle	45-45,5°
Gap between stem and sleeve
Inlet	0.03-0.06mm	0.10 mm
High school graduation	0.05-0.09 mm	0.15 mm
valve spring
Free Height	50.5 mm	49.5 mm
An effort	32.9 kgf / 40.4 mm	32.9 kgf / 41.4 mm
Piston		Mach 4
Diameter (nominal)	91.07-91.10mm
Gap between piston and cylinder bore	0.03-0.05mm
Piston ring groove width
№1	1.51-1.53mm
№2	1.51-1.53mm
Small-removable	4.010-4.035 mm
Repair pistons	Oversized by 0.25mm, 0.50mm 0.75mm, 1.00mm
Piston rings
Number of rings on the 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 lock of the ring
N1	0.30-0.45mm	0.8mm
N2	0.25-0.40 mm	0.8mm
Side oil scraper ring	0.30-0.90 mm	1.0 mm
Lateral ring clearance
№1	0.03-0.09mm	0.1 mm
№2	0.02-0.06mm	0.1 mm
Repair rings	Oversize 0.25mm, 0.50mm, 0.75mm, 1.00mm
connecting rod
Piston pin pressing force	7.500-17.500 N
Gap on the pressure-receiving surface	0.10-0.25mm	0.4 mm
Crankshaft
Diameter of main journals	59.980-60.000 mm
Diameter of connecting rod journals	49.980-50.000 mm
Neck irregularity	Max. 0.03mm
Neck taper	Max. 0.005 mm
Longitudinal play	0.05-0.25mm
Indigenous liners
Gap	0.02-0.048mm	0.1 mm
Cylinder block
Cylinder diameter	91.10-91.14 mm
Top surface flatness	Max. 0.05 mm
Out-of-roundness and taper	Max. 0.02mm
Pressure reducing valve spring
Free Length	43.8 mm
An 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)