SERVICE MANUAL UPDATE 2.0 LITER ENG. SPECIFICATIONS
Models Affected: 1989 LEMANS
SERVICE MANUAL UPDATE
This service bulletin cancels and supersedes the torques, engine specifications, and special tools found in Section 6A1A, pages 22, 23, 24 and 25 of the 1989 Pontiac LeMans Service Manual.
The correct torques, engine specifications and special tools for the LT2 2.0L four cylinder engine are as follows on the attached artwork:
SPECIFICATIONS FASTENER TORQUES -------------- ---------------- N m lb.ft. lb.in. ------------------ Camshaft Carrier and Cylinder Head Attaching Bolts, New 25 18 plus 3 turns of 60 deg. each plus 30 deg. to 50 deg. after engine warm-up (thermostat open) Camshaft Carrier Cover Bolts 9 80 Camshaft Sprocket Retaining Bolt 45 33 Camshaft Thrust Plate Bolts 8 71 Coil to Lift Bracket 25 18 Connecting Rod Cap Bolts, New 35 26 plus a 40 deg. to 45 deg. turn Coolant Pipe to Cylinder Block (VIN M) 27 20 Crankshaft Pulley to Sprocket Bolts 17 150 Crankshaft Sprocket Retaining Bolts 155 114 Distributor to Cam Carrier Nuts (VIN M) 17 150 EGR Solenoid Assembly (VIN M) 6 53 EGR Valve 20 15 Engine Mount Bracket Bolts Front (VIN M) 55 41 Engine Mount Bracket Studs Rear 50 37 Exhaust Manifold/Cylinder Head Nuts 13 115 Exhaust Manifold/Cylinder Head Studs 13 115 Generator Bracket to Cylinder Head Studs 50 37 Heater Pipe to Intake Bolts (VIN M) 24 18 Intake Manifold/Cylinder Head Nuts (VIN K) 22 16 Intake Manifold/Cylinder Head Nuts (VIN M) 24 18 Main Bearing Cap Bolts, New 60 44 plus a 40 deg. to 50 deg. turn Oil Dipstick Tube Bolts 15 133 Oil Filter 17 150 Oil Pan Retaining Bolts, require Loctite Usage 5 44 Oil Plug 45 33 Oil Pressure Test Plug 23 17 Oil Pump Control Valve Plug 30 22 Oil Pump Cover Retaining Screws 8 71 Oil Pump to Cylinder Block Bolts 7 62 Pick-Up Tube to Block Bolts 7 62 Pick-Up Tube to Oil Pump Bolts 7 62 Pressure Plate to Flywheel 25 18 Serpentine Drive Belt Tensioner 48 35 Spark Plugs 20 15 Thermostat Housing to Block 14 124 Throttle Body Assembly (VIN M) 23 17 Throttle Body Injector Assembly (VIN K) 22 16 Throttle Cable Bracket and Pulley Assembly (VIN K) 29 21 Throttle Cable Bracket (VIN M) 27 20 Timing Belt Front Cover 10 89 Timing Belt Rear Cover Bolts 10 89 Timing Belt Tensioner 25 18 Turbo Induction Tube Clamps (VIN M) 4 35 Water Outlet to CAM Carrier Bolts 15 133 Water Pump Retaining Bolts 25 18
ENGINE SPECIFICATIONS
DESCRIPTION METRIC ENGLISH ----------- ------ ------- General Data: Engine Type 4 cylinder (in Line) Displacement 2.0 Liter 121 Cu. in. Bore 86 mm 3.386" Stroke 86 mm 3.386" Compression Ratio 8.8:1 Firing Order 1-3-4-2
Diameter 85.985-86.025 mm 3.3852-3.3868" Out of Round (Max.) 0.013 mm 0.0005" Taper (Max.) 0.013 mm 0.0005" Taper-Thrust Side (Max.) 0.02 mm 0.001"
Piston:
Diameter 85.965-86.005 mm 3.3852-3.3868" Clearance to Bore 0.010-0.030 mm 0.0004-0.0012" Piston Rings: Ring, End Gap- Top Compression 0.25-0.45 mm 0.0098-0.0177" 2nd Compression 0.3-0.5 mm 0.0118-0.0197" Groove Clearance Top Impression 0.0609-0.0914 mm 0.0024-0.0036" 2nd Impression 0.0482-0.0812 mm 0.0019-0.0032"
Piston Pin:
Diameter 20.9895-20.9985 mm 0.8264-0.8267" Fit in Piston 0.011-0.014 mm 0.00045-0.00055" Fit in Rod Press 0.00045-0.00055" Camshaft: Lift-Intake 6.010 mm 0.2366" Lift-Exhaust 6.390 mm 0.2515" End Play 0.04-0.06 mm 0.0016-0.0063" Journal OD #1 42.435-42.450 mm 1.6706-1.6712" #2 42.705-42.720 mm 1.6712-1.6718" #3 42.955-42.970 mm 1.6911 -1.6917" #4 43.205-43.220 mm 1.7009-1.7015" #5 43.435-43.450 mm 1.7100-1.7106" Bearing ID #1 42.500-42.525 mm 1.6732-1.6742" #2 42.750-42.775 mm 1.6830-1.6840" #3 43.000-43.025 mm 1.6929-1.6938" #4 43.250-43.275 mm 1.7027-1.7037" #5 43.500-43.525 mm 1.7125-1.7135" Bearing Clearance 0.030-0.090 mm 0.0011-0.0035"
Crankshaft:
Main Journal Diameter (All) 57.982-57.995 mm 2.2828-2.2833" Taper (Max.) 0.005 mm 0.0002" Out of Round (Max.) 0.005 mm 0.0002" Main Bearing Clearance (All) 0.015-0.040 mm 0.0006-0.0016" Crankshaft End Play 0.070-0.032 mm 0.0028-0.0118" Connecting Rod Journal Diameter (All) 48.970-48.988 mm 1.9279-1.9287" Taper (Max.) 0.005 mm 0.0002" Out of Round (Max.) 0.005 mm 0.0002" Rod Bearing Clearance (All) 0.019-0.063 mm 0.0007-0.0025" Rod Side Clearance 0.070-0.242 mm 0.0028-0.0095"
Valve System:
Valve Lash Compensators Hydraulic Face Angle (All) 46 deg. Seat Angle (All) 45 deg. Seat Runout (Max. All) 0.05 mm 0.002" Face Runout (Max. All) 0.03 mm 0.0012" Seat Width (All) 1.270-1.780 mm 0.0500-0.0701" Valve Guide Inside Diameter (All) 7.027-7.040 mm 0.2766-0.2772" Valve Stem Outside Diameter Exhaust 6.992-6.978 mm 0.2753-0.2747" Intake 7.012-6.998 mm 0.2753-0.2755" Valve Stem Guide Clearance Intake 0.015-0.042 mm 0.0006-0.0017" Exhaust 0.030-0.060 mm 0.0012-0.0024" Valve Spring Loads Valve Open 736-794 N 165-197 lbs. @ 26.5 mm @ 1.043" Valve Closed 327-365 N 63-71 lbs. @ 37.5 mm @ 1.476"
Oil Pump:
Gear Lash 0.10-0.20 mm 0.004-0.008" Outer Gear to Body 0.11-0.19 mm 0.0043-0.0074" Outer Gear to Crescent 0.11-0.24 mm 0.0043-0.0090" Inner Gear to Crescent 0.18-0.26 mm 0.0070-0.010" End Clearance 0.030-0.10 mm 0.001 --O.004" Gear Pocket Depth 10.03-10.08 mm 0.395-0.395" Pocket Diameter Inner Gear 41.00-41.025 mm 1.614-1.615" Outer Gear 82.07-82.15 mm 3.231 -3.234" Gear Diameter Inner Gear 40.95-40.975 mm 1.612-1.613" Outer Gear 81.910-81.964 mm 3.2248-3.2269"
General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.
