Engine Mechanical Specifications. Chevrolet Optra 2008

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2008 🢒 Optra 🢒 Preface 🢒 Cautions and Notices 🢒 Engine Mechanical Specifications

Application	Specification
Application	Metric	English
Block
Cylinder Bore Diameter	80 mm	3.1 in
Cylinder Bore Out-of-Round - Maximum	0.0065 mm	0.0002 in
Cylinder Bore Taper - Maximum	0.0065 mm	0.0002 in
Camshaft
Bearing Journal #1 OD	28.000-28.02 mm	1.1023-1.1031 in
Camshaft Lobe Lift - Exhaust	8.0 mm	0.31 in
Camshaft Lobe Lift - Intake	8.5 mm	0.334 in
Cooling System
Capacity	7.5 L	7.9 qt
Crankshaft
Connecting Rod Journal Diameter	42.971-42.987 mm	1.6917-1.6924 in
Connecting Rod Journal Out-of-Round	0.004 mm	0.0001 in
Crankshaft End Play	0.05-0.28 mm	0.002-0.011 in
Crankshaft Main Bearing Clearance - All	0.026-0.042 mm	0.001-0.002 in
Crankshaft Main Journal Diameter	54.982-54.994 mm	2.164-2.165 in
Crankshaft Main Journal Out-of-Round	0.004 mm	0.0001 in
Cylinder Head
Minimum Overall Height After Machining	135.63 mm	5.339 in
Overall Height	135.63-136.23 mm	5.339-5.363 in
General Data
Bore	80.5 mm	3.1 in
Compression Ratio	9.5-9.9:1
Displacement	1 796 cm³	97.5 in³
Engine Type	F18D
Firing Order	1-3-4-2
RPO	LDA
Stroke	88.2 mm	3.47 in
Lubrication System
Lubricating Type	Forced Feed
Oil Pump
Gap Between Oil Pump Body and Outer Rotor	0.40-0.484 mm	0.0157-0.019 in
Inner Rotor Side Clearance	0.035-0.085 mm	0.001-0.003 in
Outer Rotor Side Clearance	0.45-0.10 mm	0.02-0.04 in
Relief Valve Spring Free Length	81 mm	3.2 in
Pin
Clearance: In Piston	0.010-0.020 mm	0.0003-0.0007 in
Clearance: In Rod	Interference Fit To Rod
Length	55 mm	2.165 in
Piston Pin Diameter	18.0 mm	0.708 in
Piston Pin Offset	0.55-0.85 mm	0.02-0.03 in
Piston
Clearance to Bore	0.020-0.040 mm	0.0008-0.0016 in
Piston Diameter	80.465-80.475 mm	3.167-3.168 in
Piston Ring End Gap
First Compression Ring	0.2-0.3 mm	0.008-0.012 in
Second Ring Compression	0.4-0.6 mm	0.015-0.024 in
Piston Ring to Groove Clearance
First Compression Ring	0.050-0.080 mm	0.002-0.003 in
Second Compression Ring	0.050-0.082 mm	0.002-0.032 in
Sealants and Adhesives
Camshaft Carrier to Cylinder Head	HN 1581 - Loctite® 515
Exhaust Manifold Studs/Nuts	Anti-Seize Compound - HMC Spec HN 1325
Oil Gallery Plug	HN 1256 - Loctite® 242
Oil Pan Bolts	HN 1256 - Loctite® 242
Oil Pan Pickup Tube Bolts	HN 1256 - Loctite® 242
Oil Pump Bolts	HN 1256 - Loctite® 242
Rear Main Bearing Cap	GE P/N RTV 159
Valve Springs
Valve Spring Load - Closed	247-273 N @ 32 mm	182-202 lb @ 1.25 in
Valve Spring Load - Open	554-606 N @ 23 mm	409-447 lb @ 0.90 in
Valves
Valve Diameter - Exhaust	27.5 mm	1.08 in
Valve Diameter - Intake	31.2 mm	1.22 in
Valve Seat Width - Exhaust	1.4-1.8 mm	0.055-0.071 in
Valve Seat Width - Intake	1.0-1.4 mm	0.039-0.055 in
Valve Stem Diameter - Intake	6 mm	0.236 in
Valve Stem Diameter - Exhaust	6 mm	0.236 in

Valve Guide Reaming Table

Size	Reamer	Production Code	Service Code
Normal	--	--	K
1.9 mm (0.075 in)	KM-805	1	K1
3.8 mm (0.150 in)	--	2	K2