LT1 _ LT4 Engine Specs

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LT1 _ LT4 Engine Specs Powered By Docstoc
					LT1 / LT4 Engine Specs
Description:                                                       Specifiactions:


      Engine type:                                                       V8
      Displacement:                                                      350 CID (5.7L)
      Bore:                                                              4.000"
      Stroke:                                                            3.480"
      Compression ratio:                                                 10.4:1
      Firing order:                                                      1-8-4-3-6-5-7-2
      Spark Plug type:                                                   AC41-943
      Spark Plug gap:                                                    0.050"



Fastener Description:                                              Torque Spec:


      Camshaft retainer bolt:                                            106 in-lbs
      Camshaft sprocket bolt:                                            18 ft-lbs
      Connecting rod nut (1st pass):                                     20 ft-lbs
      Connecting rod nut (final pass):                                   55 degrees
      Crankshaft torsional damper to hub bolts:                          63 ft-lbs
      Crankshaft hib bolt:                                               74 ft-lbs
      Crankshaft main bearing cap bolts:                                 77 ft-lbs
      Crankshaft rear oil seal housing nut and bolt:                     11 ft-lbs
      Crankshaft rear oil seal housing stud:                             35 in-lbs
      Cylinder head bolts (first pass):                                  22 ft-lbs
      Cylinder head long bolts (final pass):                             80 degrees
      Cylinder head medium bolts (final pass):                           80 degrees
      Cylinder head short bolts (final pass):                            67 degrees
      Engine block oil galley plug:                                      15 ft-lbs
      Engine front cover bolt:                                           106 in-lbs
      Exhaust Manifold nut and bolts:                                    30 ft-lbs
      Engine flywheel/flexplate bolts:                                   74 ft-lbs
      Intake manifold bolts and nuts (first pass):                       71 in-lbs
      Intake manifold bolts and nuts (final pass):                       35 ft-lbs
      Oil filter adapter bolt:                                           18 ft-lbs
      Oil filter:                                                        15 ft-lbs
      Oil level indicator tube bolt:                                     106 in-lbs
      Oil pan corner bolt/nut:                                           106 in-lbs
      Oil pan deflector nut:                                             30 ft-lbs
      Oil pan drain plug:                                                15 ft-lbs
      Oil pump bolt to rear main bearing cap:                            66 ft-lbs
      Oil pump cover bolts:                                              80 in-lbs
      Oil pump driveshaft mounting bolt:                                 13 ft-lbs
      Spark plugs:                                                       15 ft-lbs
      Engine block coolant drain plug:                                   15 ft-lbs
      Valve lifter guide retainer bolts:                                 18 ft-lbs
      Valve rocker arm ball stud:                                        50 ft-lbs
      Valve rocker arm center cover bolts:                               106 in-lbs
      Valve rocker arm nut (LT-4 endines only):                          18 ft-lbs
      Water pump bolts/studs:                                            33 ft-lbs
      Water pump driveshaft bearing retainer bolt:                       106 in-lbs
      Throttle body bolt:                                                18 ft-lbs
      Starter motor bolt:                                                35 ft-lbs
      Secondary air injection pump bracket bolt:                         30 ft-lbs
      Secondary air injection pump fitting to exhaust manifold:          41 ft-lbs
      Oil temperature sensor:                                            106 in-lbs
      Oil pressure sensor and switch:                                    106 in-lbs
      Oil pressure gauge sensor:                                         106 in-lbs
      Oil pressure fitting:                                              106 in-lbs
       Distributor bolts:                                             106 in-lbs
       Crankshaft position sensor bolt:                               106 in-lbs
       EGR solenoid valve bracket nut (LT-1 engines only):            18-ft-lbs
       EGR opening cover nut (LT-4 engines only):                     18-ft-lbs
       EGR valve nut (LT1 engines only):                              18-ft-lbs
       EGR valve pipe bolt and nut (LT-1 engines only):               18-ft-lbs
       Engines coolant air bleed pipe bolt:                           30 ft-lbs
       Engine oil level sensor:                                       26 ft-lbs
       Evaporate emission canister purge valve bracket bolt:          53 in-lbs
       Fuel injection fuel rail bolt:                                 89 in-lbs
       Generator bracket bolt:                                        30 ft-lbs
       Ignition coil studs:                                           30 ft-lbs
       Knock sensor bolt:                                             15 ft-lbs
       MAP sensor bolt:                                               53 in-lbs



Transmission Fastener Specs                                     Torque Specs


       Clutch actuator cylinder nut:                                  15   ft-lbs
       Clutch fork t-stud bolt:                                       18   ft-lbs
       Clutchmaster cylinder nut:                                     20   ft-lbs
       Clutch pressure palte cover (6 speed):                         22   ft-lbs
       Clutch pressure palte cover (5 speed):                         15   ft-llbs (plus 45 degrees)
       Flywheel bolt (6 speed):                                       61   ft-lbs
       Flywheel bolt (5 speed):                                       74   ft-lbs
       Flywheel housing cover bolt:                                   75   in-lbs
       Flywheel housing bolt (6 speed):                               55   ft-lbs
       Flywheel housing bolt (5 speed):                               35   in-lbs
       Transmission brace bolts:                                      37   in-lbs
       Transmission brace nut:                                        37   ft-lbs
       Transmission bolt/screw:                                       26   in-lbs



GM Casting Numbers:                                             GM Part Numbers

Engine Block:                                                   Cylinder Heads:


       ALL LT1 / LT4 blocks (same for 2 & 4 bolt blocks):             LT1 Design
            o 10125327                                                      o 10128374
       265 CID:                                                       LT4 Design
            o 10168588                                                      o 12363287

Clinder Heads:                                                  Cylinder Head Gaskets:


       LT1 350 Cast Iron 1992-93:                                     LT1 Iron Head (compressed thickness 0.028")
            o 12554290                                                      o 12553160
       LT1 350 Cast Iron 1994-97:                                     LT1 Aluminum Head (compressed thickness
            o 10125320                                                  0.050")
       LT1 350 Aluminum 1992-97:                                           o 10168457
            o 10128374                                                  LT4 Aluminum Head (compressed thickness
       LT4 350 Aluminum 1996 Corvette:                                 0.043")
            o 12363287                                                      o 12551488
       265 CID Cast Iron:
            o 10208890                                          Cylinder Head Bolt Washers:

Crankshaft:                                                            LT1 Aluminum Head Bolt Washers
                                                                            o 14011040
       LT1 / LT4 cast cranks:                                         LT4 Aluminum Head Bolt Washers
            o 14088526                                                      o 10051155
       265 CID:
              o    10168568                                           Intake Manifold Gaskets:

Camshaft:                                                                     LT1 Style Intake
                                                                                   o 12524653
       1992-95 350 w/ Aluminum heads:                                        LT4 Style Intake
            o 241                                                                  o 12367777
       1994-96 350 w/ iron heads:
            o 600 or 779                                              Timing Parts:
       1996-97 350 w/ Aluminum heads:
            o 705 or 242                                                      GM LT1/LT4 extreme duty timing chain kit
                                                                                   o 12370835
Camsahft Reference:                                                           Cam sprocket
                                                                                   o 12555885
       1995-97 LT1 (Corvette/Camaro/Firebird)                                Crank sprocket
            o 12551705                                                             o 12555886
                     .447" Intake lift - .459" exhaust lift                  Cam gears
                     w/ 1.5" rockers, intake duration 203                         o 10128349 1992-95 350
                     exhaust duration 210 @ .050"                                 o 10206039 1996-97 350
       1996 LT4 production cam (Corvette)
            o 12551142                                                Distributors (Opti Spark)
                     .476" Intake lift - .480" exhaust lift
                     w/ 1.6" rockers, intake duration 203                    1992-94
                     exhaust duration 210 @ .050"                                     o   10457702
                                                                              1995-97
Water Pump:                                                                            o   01104032


       All LT1 / Gen II:                                             Ignition Coil:
             o 10128327
                                                                              1992-93
Timing Front Cover:                                                                    o   01115315
                                                                              1994-95
       Early 1992-93 (small distributor hole)                                         o   10477208
             o 10128289                                                       1996-97
       Second Version 1994-95 (large distributor hole)                                o   10489421
             o 10214196
       Third version 1996-97 (crank postion sensor)                  Valve Covers:
             o 12550032
                                                                              Valve Cover Gaskets (center bolt)
                                                                                   o 10046089
                                                                              Valve Covers (black plastic LT4 style)
                                                                                   o 12552321 LH
                                                                                   o 12552322 RH
                                                                              Valve Cover Bolts - Chrome
                                                                                   o 12356818

                                                                      Oil Pump:


                                                                              Oil pump high volume
                                                                                    o 14044872
                                                                              Oil pump shaft
                                                                                    o 3998287
                                                                              Oil pump bolt
                                                                                    o 3892678
                                                                              Oil pump shaft retainer sleeve
                                                                                    o 3764554


                  Courtesy of HPBooks, Small-Block Chevy LT-1/LT-4 Engines, by Mike Mavrigian

				
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