====== General Mechanical Specifications ====== All specs shown below have been pulled from a 98 Camaro service manual. L67 details will be checked and added later. ===== General specifications ===== |Application |Specifications || | ::: |metric |english | |Engine Type |90* V6 || |displacement |231 cubic inches || |liters |3.8 L || |RPO |L36 || |Bore |96.52 mm |3.8 in. | |Stroke |86.36 mm |3.4 in. | |Compression Ratio |9.4:1 || |Firing Order |1-6-5-4-3-2 || ===== Lubrication System ===== |Application |Specifications || | ::: |metric |english | |oil capacity with oil filter change |4.25 L |4.5 qt | |oil capacity without oil filter change |3.75 L |4 qt | |oil pressure @ operating temperature (1850 RPM) with 10w-30 oil |414 kPa |60 psi min | |oil filter type |throw away element and can || |gear pocket depth |11.71-11.75 mm |0.461-0.4625 in. | |gear pocket diameter |89.10-89.20 mm |3.508-3.512 in. | |inner gear tip clearance |0.152 mm |0.006 in | |outer gear diameter clearance |0.203-0.381 mm |0.008-0.015 in. | |end clearance |0.025-0.089 mm |0.001-0.0035 in. | |valve-to-bore clearance |0.038-0.076 mm |0.0015-0.003 in. | |lubrication type | | | |main bearings |pressure || |connecting rods |pressure || |piston pins |splash || |balance shaft bearing - front |splash || |balance shaft bearing - rear |pressure || |camshaft bearings |pressure || |timing chain |splash || |cylinder walls |splash || |oil pump type |gerotor || |oil pressure sending uint |electrical || |oil intake |stationary || |oil filter system |full flow || ===== Cylinders ===== |Application |Specifications || | ::: |metric |english | |cylinder bore diameter |96.5 mm |3.8 in. | |cylinder bore out-of-round maximum |0.0254 mm |0.0010 in | |cylinder bore taper |0.0254 mm |0.0010 in | ===== Pistons ===== |Application |Specifications || | ::: |metric |english | |piston clearance (39mm from top of piston) |0.010-0.051mm |0.0004-0.0020 in. | |piston ring groove depth - top compression |4.019-4.146 mm |0.1580-0.1630 in. | |piston ring groove depth - 2nd compression |4.214-4.341 mm |0.0166-0.1710 in. | |piston ring groove depth - oil control |3.814-3.941 mm |0.1500-0.1550 in. | |piston ring end gap - top compression |0.305-0.559 mm |0.0120-0.0220 in. | |piston ring end gap - 2nd compression |0.762-1.016 mm |0.0300-0.0400 in. | |piston ring end gap - oil control |0.254-0.762 mm |0.0100-0.0300 in. | |piston ring side clearance - top compression |0.033-0.079 mm |0.0013-0.0031 in. | |piston ring side clearance - 2nd compression |0.033-0.079 mm |0.0013-0.0031 in. | |piston ring side clearance - oil control |0.023-0.201 mm |0.0009-0.0079 in. | |piston ring width - top compression |1.176-1.197 mm |0.0463-0.0471 in. | |piston ring width - 2nd compression |1.476-1.497 mm |0.0581-0.0589 in. | |piston ring width - oil control |1.854-2.007 mm |0.0730-0.0790 in. | |piston pin diameter |21.9950-22.0000 mm |0.8659-0.8661 in. | |piston pin clearance in piston |0.0020-0.0130 mm |0.00008-0.00051 in. | |piston pin fit-in-rod (clearance) |0.0066-0.0217 mm |0.0003-0.0009 in. | ===== Crankshaft ===== |Application |Specifications || | ::: |metric |english | |crankshaft - main journal diameter - all |63.470-63.495 mm |2.4988-2.4998 in. | |crankshaft - rod journal diameter - all |57.1170-57.1475 mm |2.2487-2.2499 in. | |crankshaft - main journal taper - maximum |0.0076 mm |0.0003 in. | |crankshaft - rod journal taper - maximum |0.0076 mm |0.0003 in. | |crankshaft - main journal out-of-round - maximum |0.0076 mm |0.0003 in. | |crankshaft - rod journal out-of-round - maximum |0.0076 mm |0.0003 in. | |crankshaft - main bearing to journal clearance 1 |0.0178-0.0406 mm |0.0007-0.0016 in. | |crankshaft - main bearing to journal clearance 2 and 3 |0.0254-0.0580 mm |0.0010-0.0020 in. | |crankshaft - main bearing to journal clearance 4 |0.0229-0.0457 mm |0.0009-0.0018 in. | |crankshaft - rod bearing clearance |0.0127-0.0660 mm |0.0005-0.0026 in. | |crankshaft - end play |0.076-0.276 mm |0.0030-0.0110 in. | ===== Connecting Rods ===== |Application |Specifications || | ::: |metric |english | |connecting rod - rod side clearance |0.102-0.508 mm |0.0040-0.0200 in. | |connecting rod - connecting rod large end bore ID |60.295-60.312 mm |2.37378-2.3745 in. | ===== Camshaft ===== |Application |Specifications || | ::: |metric |english | |camshaft - journal diameter |47.655-46.858 mm |1.8462-1.8448 in. | |camshaft - bearing inside diameter 1 and 4 |46.970-46.934 mm |1.8428-1.8492 in. | |camshaft - bearing inside diameter 2 and 3 |46.977-46.942 mm |1.8481-1.8495 in. | |camshaft - bearing to journal clearance |0.041-0.119 mm |0.0016-0.0047 in. | |camshaft - intake maximum lobe lift |6.55 mm |0.258 in. | |camshaft - exhaust maxiumum lobe lift |6.48 mm |0.255 in. | ===== Balance Shaft ===== |Application |Specifications || | ::: |metric |english | |balance shaft - end play |0.0-0.171 mm |0.0000-0.0067 in. | |balance shaft - rear journal diameter |38.085-38.105 mm |1.4994-1.5002 in. | |balance shaft - radial play-front bearing clearance |0.0-0.026mm |0.0000-0.0010 in. | |balance shaft - rear bearing to journal clearance |0.0127-0.109 mm |0.0005-0.0043 in. | |balance shaft - drive gear lash |0.050-0.125 mm |0.0020-0.0049 in. | |balance shaft - bearing bore diameter - front |51.973-51.999 mm |2.0462-2.0472 in. | |balance shaft - bearing bore diameter - rear, in block |47.584-47.612 mm |1.8735-1.8745 in. | |balance shaft - bearing inside diameter - rear |38.118-38.194 mm |1.5007-1.5037 in. | ===== Valve System ===== |Application |Specifications || | ::: |metric |english | |lifter |hydraulic || |rocker arm ratio |1.6:1 || |face angle |45* || |seat angle |45* || |minimum margin |0.635 mm |0.025 in. | |seat runout - maximum |0.050 mm |0.002 in. | |seat width - intake |1.53-2.03 mm |0.060-0.080 in. | |seat width - exhaust |2.29-2.79 mm |0.090-0.110 in. | |stem height - all |49.15-50.17 mm |1.935-1.975 in. | |stem clearance - all |0.038-0.089 mm |0.0015-0.0032 in. | ===== Valve Springs ===== |Application |Specifications || | ::: |metric |english | |valve spring - free length |499.78 mm |1.960 in. | |valve spring - load - closed |334 N @ 43.69 mm |75 lb @ 1.72 in. | |valve spring - load - open |1014 N @ 32.4 mm |228 lb @ 1.277 in. | |valve spring - installed height |42.93-44.45 mm |1.690-1.720 in. | |valve spring - number of active coils |4.48 || |valve spring - number of total coils |6.6 || ===== Flywheel ===== |Application |Specifications || | ::: |metric |english | |flywheel - runout - maximum |0.38 mm |0.015 in. | \\