Engine with two overhead camshafts-technical specifications (Hyundai Sonata Y3)

Technical specifications	Nominal value	Limit value
Engine type	In-line, with two overhead camshafts
Number of cylinders	4
Cylinder diameter	85 mm
Piston stroke	88 mm
Working volume	1997 cm³
Compression ratio	9,0
Cylinder firing order	1—3—4—2
Idle speed	750±100 rpm
Ignition timing angle at idle speed	5°±2° before TDC
Valve timing:
Inlet valve
Opens	18° before TDC
It's closing	54° after BDC
Exhaust valve
Opens	47° BDC
It's closing	17° after TDC
Cylinder head
Non-flatness of the joint surface	0.05 mm	0.2 mm
Repair size of the hole under the valve seat
Inlet
0.3 mm excess.	35,300-35,325 mm
0.6 mm excess.	35,600-35,625 mm
Outlet
0.3 mm excess.	35,300-35,325 mm
0.6 mm excess.	35,600-35,625 mm
Repair size of valve guide bushing (inlet and outlet)
0.05 mm excess.	12,050-12,068 mm
0.25 mm excess.	12,250-12,268 mm
0.50 mm excess.	12,500-12,518 mm
Camshaft
Cam height
Inlet valve	35,493 mm	34,993 mm
Exhaust valve	35,200 mm	34,700 mm
Neck diameter	26 mm
Bearing clearance	0.05-0.09 mm
Axial play	0.1-0.2 mm
Valve
Length
Inlet	109.5 mm
Outlet	109.7 mm
Rod diameter
Inlet	6,565-6,580 mm
Outlet	6,530-6,550 mm
Chamfer angle	45-45,5°
Clearance between valve stem and valve guide
Inlet	0.020-0.047 mm	0.10 mm
Outlet	0.050-0.085 mm	0.15 mm
Guide bushing, length
Inlet valve	45.5 mm
Exhaust valve	50.5 mm
Valve seat
Seat chamfer width	0.9-1.3 mm
Corner	44-44,5°
Valve spring
Free length	48.3 mm	47.3 mm
Load	300 N
Cylinder block
Cylinder diameter	85.00-85.03 mm
Out of roundness and taper	Less than 0.01 mm
Non-flatness of the joint surface	Less than 0.05 mm	0.1 mm
Piston
Diameter	84.97-85.00 mm
Clearance between piston and cylinder	0.01-0.03 mm
Ring groove width
No. 1	1.22-1.24 mm
No. 2	1.52-1.54 mm
Oil scraper ring	3.01-3.03 mm
Piston rings
Gap
№ 1, № 2	0.03-0.07 mm	0.1 mm
Gap in the ring lock
№ 1	0.25-0.45 mm	0.8 mm
№ 2	0.35-0.50 mm	0.8 mm
Oil scraper ring	0.20-0.70 mm	1.0 mm
Repair size, larger by	0.25, 0.50, 0.75, 1.00 mm
Connecting rod
Connecting rod clearance on crankshaft	0.10-0.24 mm	0.4 mm
Piston pin pressing force	7.5-17.5 N
Crankshaft bearing
Oil clearance	0.02-0.05 mm	0.1 mm
Crankshaft
Crankpin diameter	44.980-44.995 mm
Main journal diameter	56,980-56,995 mm
Out of roundness of the connecting rod and main journals	Less than 0.015 mm
Taper of the connecting rod and main journals	Less than 0.005 mm
Axial play	0.05-0.18 mm	0.25 mm
Flywheel, beating		0.13 mm
Oil pressure at idle [oil temperature 75-90°C]	80 kPa and more
Oil pump
Gap between teeth
Drive wheel	0.16-0.21 mm	0.25 mm
Driven wheel	0.13-0.18 mm	0.25 mm
Lateral clearance
Drive wheel	0.08-0.14 mm	0.25 mm
Driven wheel	0.06-0.12 mm	0.25 mm
Right shaft
Front neck diameter	41.959-41.975 mm
Rear neck diameter	40.951-40.967 mm
Bearing clearance
Front	0.020-0.0061 mm
Rear	0.050-0.091 mm
Left shaft
Front neck diameter	18,467-18,480 mm
Rear neck diameter	40.959-40.975 mm
Bearing clearance
Front	0.020-0.0054 mm
Rear	0.042-0.083 mm