Page 121 of 2643
SECTION : 1C2
1.8L DOHC ENGINE MECHANICAL
CAUTION : Disconnect the negative battery cable before removing or installing any electrical unit or when a tool
or equipment could easily come in contact with exposed electrical terminals. Disconnecting this cable will help
prevent personal injury and damage to the vehicle. The ignition must also be in LOCK unless otherwise noted.
TABLE OF CONTENTS
SPECIFICATIONS1C2–2 . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Specifications 1C2–2. . . . . . . . . . . . . . . . . . . . .
Fastener Tightening Specifcations 1C2–4. . . . . . . . . .
SPECIAL TOOLS1C2–6 . . . . . . . . . . . . . . . . . . . . . . . . . .
Special Tools Table 1C2–6. . . . . . . . . . . . . . . . . . . . . . .
COMPONENT LOCATOR1C2–8 . . . . . . . . . . . . . . . . . . .
Upper End 1C2–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lower End 1C2–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MAINTENANCE AND REPAIR1C2–12 . . . . . . . . . . . . .
ON–VEHICLE SERVICE 1C2–12. . . . . . . . . . . . . . . . . . .
Camshaft Cover 1C2–12. . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Head and Gasket 1C2–13. . . . . . . . . . . . . . . .
Camshafts 1C2–22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Timing Belt Check and Adjust 1C2–24. . . . . . . . . . . . .
Timing Belt 1C2–28. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Pan 1C2–32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Pump 1C2–33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Mount 1C2–37. . . . . . . . . . . . . . . . . . . . . . . . . . .
Intake Manifold 1C2–38. . . . . . . . . . . . . . . . . . . . . . . . . . Exhaust Manifold 1C2–41. . . . . . . . . . . . . . . . . . . . . . . .
Camshaft Gears 1C2–43. . . . . . . . . . . . . . . . . . . . . . . . .
Rear Timing Belt Cover 1C2–44. . . . . . . . . . . . . . . . . . .
Engine 1C2–46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pistions and Rods 1C2–51. . . . . . . . . . . . . . . . . . . . . . .
UNIT REPAIR 1C2–56. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Head and Valve Train Components 1C2–56.
Crankshaft 1C2–63. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Crankshaft Bearing and Connecting Rod
Beadings – Gauging Plastics 1C2–72. . . . . . . . . . . .
GENERAL DESCRIPTION AND SYSTEM
OPERATION1C2–75 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Head and Gasket 1C2–75. . . . . . . . . . . . . . . .
Crankshaft 1C2–75. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Timing Belt 1C2–75. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Pump 1C2–75. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Pan 1C2–75. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exhaust Manifold 1C2–75. . . . . . . . . . . . . . . . . . . . . . . .
Intake Manifold 1C2–75. . . . . . . . . . . . . . . . . . . . . . . . . .
Camshaft 1C2–75. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Page 122 of 2643
1C2 – 2I1.8L DOHC ENGINE MECHANICAL
DAEWOO V–121 BL4
SPECIFICATIONS
ENGINE SPECIFICATIONS
ApplicationDescription
General Data:
Engine Type1.8L DOHCT18SED
Displacement1.8L DOHC1,799 cm3 (109.7 in3)
Bore Stroke1.8L DOHC81.6 x 86 mm (3.21 in. x 3.38 in.)
Compression Ratio9.6 ± 0.02:1
Firing Oder1–3–4–2
Cylinder Bore:
Diameter1.8L DOHC81.575~81.625 mm (3.2116~3.2135 in.)
Out of Round (Maximum)0.013 mm (0.0005 in.)
Taper (Maximum)0.013 mm (0.0005 in.)
Pistion:
Diameter1.8L DOHC81.575~82.105 mm (3.2115~3.2325 in.)
Clearance to Bore0.0100~0.0300 mm (0.00039~0.00110 in.)
Piston Protrusion0.5 mm (0.019 in.) Maximum
Piston Taper0.013 (0.0005 in.)
Piston Rings:
Ring, End Gap: Top Compression0.3~0.5 mm (0.011~ 0.019 in.)
Ring, End Gap: Second Compression0.3~0.5 mm (0.011~0.019 in.)
Piston Pin:
Diameter20.9970~20.9985 mm (0.82665~0.82671 in.)
Pin Offset0.8 mm (0.03 in.) Towards Thrust Side
Clearance: In Piston0.0035~0.0140 mm (0.00013~0.00055 in.)
Clearance: In RodInterference Fit in Rod
Length61.5 mm (2.42 in.)
Camshaft:
Lift – Intake9.2 mm (0.36 in.)
Lift – Exhaust9.2 mm (0.36 in.)
End Play0.040~0.14 mm (0.0015~0.0055 in.)
Bearing Journal OD42.455~43.470 mm (1.6714~1.7114 in.)
Crankshaft:
Main Journal:
Diameter (All)
Out of Round (Maximum)57.974~57.995 mm (2.2824~2.2832 in.)
0.003 mm (0.0001 in.)
Main Bearing Clearance (All)0.015~0.040 mm (0.00059~0.00157 in.)
Crankshaft End Play0.070~0.302 mm (0.0027~0.0118 in.)
Service OversizeAvailable in 2 sizes
0.25 mm and 0.50 mm (0.0098~0.0196 in.)
Connecting Rod Journal:
Page 123 of 2643
1.8L DOHC ENGINE MECHANICAL 1C2 – 3
DAEWOO V–121 BL4
Application Description
Diameter (All)
Out of Round (Maximum)48.970~ 48.988 mm (1.9279~1.9287 in.)
0.004 mm (0.00015 in.)
Cylinder Head:
Valve Stem Protrusion39.2~39.8 mm (1.54~1.56 in.)
Valve Guide Height13.7~14.0 mm (0.54~0.57 in.)
Overall Height134 ± 0.025 mm (5.2755~0.0009 in.)
Minimum Overall Height After Machining133.9 mm (5.27 in.)
Valve System:
Valve Lash CompensatorsHydraulic Tappet
Seat Runout (Maximum, All)0.03 mm (0.00118 in.)
Face Runout (Maximum, All)0.03 mm (0.00118 in.)
Valve Stem Diameter:
Intake
Exhaust5.945~5.960 mm (0.2341~0.2346 in.)
5.945~5.960 mm (0.2341~0.2346 in.)
Valve Diameter:
Intake
Exhaust32 ± 0.1 mm (1.2598 ± 0.0039 in.)
29 ± 0.1 mm (1.1417 ± 0.0039 in.)
Valve Seat Width:
Intake
Exhaust1.0~1.5 mm (0.039~0.059 in.)
1.7~2.2 mm (0.066~0.086 in.)
Valve Face Angle44°
Valve Guide Inside Diameter7.03~7.05 mm (0.276~0.277 in.)
Oil Pump:
Gear Lash0.10~0.20 mm (0.003~0.007 in.)
Outer Gear to Body0.11~0.19 mm (0.004~0.007 in.)
Outer Gear to Crescent0.40~0.50 mm (0.015~0.019 in.)
Inner Gear to Crescent0.35~0.40 mm (0.013~0.015 in.)
End Clearance0.030~0.10 mm (0.001~0.003 in.)
Sealants and Adhesives:
Rear Main Bearing CapGE p/n RTV 159
Camshaft Carrier to Cylinder HeadHN 1581 (Loctite® 515)
Oil Pan BoltsHN 1256 (Loctite® 242)
Oil Pump BoltsHN 1256 (Loctite® 242)
Oil Pan Pickup Tube BoltsHN 1256 (Loctite® 242)
Oil Gallery PlugHN 1256 (Loctite® 242)
Coolant Jacket Caps and Plugs (Freeze Plugs)HN 1756 (Loctite® 176)
Exhaust Manifold Studs/NutsAnti–seize Compound (HMC Spec HN1325)
Page 124 of 2643
1C2 – 4I1.8L DOHC ENGINE MECHANICAL
DAEWOO V–121 BL4
FASTENER TIGHTENING SPECIFCATIONS
ApplicationNSmLb–FtLb–In
Air Cleaner Housing Bolts10–89
Automatic Tensioner Bolt2518–
Camshaft Bearing Bridge and Oil Pan Scraper Bolts20 + 45°15 + 45°–
Camshaft Bearing Cap Bolts8–71
Camshaft Cover Bolts8–71
Charcoal Canister Purge and Exhaust Gas Recirculation Sole-
noid Bracket Bolt5–44
Connecting Rod Bearing Cap Bolts35
+ 45° + 15°26
+ 45° + 15°–
Coolant Bypass Housing and Mounting Bolts1511–
Crankshaft Bearing Cap Bolts50
+ 45° + 15°37
+ 45° + 15°–
Crankshaft Pulley Bolts2015–
Crankshaft Gear Bolt145
+ 30° + 15°107
+ 30° + 15°–
Cylinder Head Bolts25 + 90°
+ 90° + 90°18 + 90°
+ 90° + 90°–
Direct Ignition System Coil and Exhaust Gas Recirculation
Mounting Bracket Bolts2518–
Engine Mount Bracket Retaining Bolts and Nuts5541–
Engine Mount Retaining Bolts4533–
Engine–to–Intake Manifold Support Bracket Bolts2015–
Exhaust Camshaft Gear Bolt50
+ 60° + 15°37
+ 60° + 15°–
Exhaust Flex Pipe–to–Catalytic Converter or Connecting Pipe
Retaining Nuts3526–
Exhaust Flex Pipe–to–Exhaust Manifold Retaining Nuts3526–
Exhaust Manifold Heat Shield Bolts8–71
Exhaust Manifold Retaining Nuts2216–
Flexible Plate Bolts4533–
Flywheel Bolts65
+ 30° + 15°48
+ 30° + 15°–
Front Timing Belt Cover Bolts6–53
Generator–to–Intake Manifold Strap Bracket Bolt2216–
Generator–to–Intake Manifold Support Bracket Bolts3727–
Intake Camshaft Gear Bolt50
+ 60° + 15°37
+ 60° + 15°–
Intake Manifold Retaining Bolt and Nuts2216–
Intake Manifold Support Bracket Lower Bolt2518–
Intake Manifold Support Bracket Upper Bolts2518–
Lower Block Support Bracket and Splash Shield Bolts3526–
Oil Pan Drain Plug3526–
Oil Pan Flange–to–Transaxle Bolts4030–
Page 125 of 2643
1.8L DOHC ENGINE MECHANICAL 1C2 – 5
DAEWOO V–121 BL4
Application Lb–InLb–Ft NSm
Oil Pan Retaining Bolts10–89
Oil Pressure Switch4030–
Oil Suction Pipe Bolts8–71
Oil Suction Pipe Support Bracket Bolts16–53
Oil Pump Rear Cover Bolts6–53
Oil Pump Retaining Bolts10–89
Pulse Pickup Sensor Disc1310–
Rear Timing Belt Cover Bolts7–62
Safety Relief Valve Bolt3022–
Spark Plug Cover Bolts8–71
Spark Plugs2015–
Thermostat Housing Mounting Bolts1511–
Throttle Cable Bracket Bolts8–71
Timing Belt Automatic Tensioner Bolts2518–
Timing Belt Idler Pulley Bolt2518–
Timing Belt Idler Pulley Nut2518–
Transaxle Bell Housing Bolts7555–
Transaxle Torque Converter Bolts6044–
Page 126 of 2643
1C2 – 6I1.8L DOHC ENGINE MECHANICAL
DAEWOO V–121 BL4
SPECIAL TOOLS
SPECIAL TOOLS TABLE
KM–653
Adapter
KM–135
Adapter
KM–805
Valve Guide
Reamer
J–36792
Crankshaft Rear
Oil Seal Installer
KM–571–B
Gauge
DW110–060
Engine Assembly
Support Fixture
KM–412
Engine Overhaul
Stand
KM–348
Valve Spring
Compressor
Page 127 of 2643
1.8L DOHC ENGINE MECHANICAL 1C2 – 7
DAEWOO V–121 BL4
KM–635
Crankshaft Rear
Oil Seal Installer
KM–427
Piston Pin
Service Set
J–8087
Cylinder Bore
Check Gauge
KM–340–0
Cutter Set
Includes: KM–340–7
Guide Drift
KM–340–13
Cutters
KM–340–26
Cutters
KM–470–B
Angular Torque Gauge
KM–498–B
Pressure Gauge
J–8037
Universal Piston
Ring Compressor
Page 128 of 2643
1C2 – 8I1.8L DOHC ENGINE MECHANICAL
DAEWOO V–121 BL4
COMPONENT LOCATOR
UPPER END