torque specs for 2003 chevy silverado

While the power output from the Gen IV 5.3 L Vortec varied, the maximum horsepower . Ignition Coil-to-Bracket Bolts LS1/LS6 106 inch lbs. Oil Filter Fitting LS1/LS2/LS6/LS7 40 ft. lbs. lbs., (K30) 65 ft. lbs. Crankshaft Balancer Bolt (Step 2 Pass-Install a NEW Bolt After Install Pass & Tighten as Described in the First and Final Passes) LS1/LS2/LS6 37 ft. lbs. RARE 2000 Chevy Silverado 1500, 4x4, Regular Cab, Short Bed, Power veh-markets. Be sure to confirm this information for your engine. A forum community dedicated to GMC and Chevy full size owners and enthusiasts. Chevrolet Colorado - Wikipedia Features; How it works; FAQ; Projects; Sign in or Sign up. Used - (Inch Lbs) Backlash (.001 Inch) Ring Gear Bolt Torque. 9,755 satisfied customers. Thank you sir :shake: I doubt they're different or much different then each other. The oil pump assembly should be tightened down to the engine block using 18 ft-lbs. Front Upper Arm Frame Bolts Torque Spec. If you are planning on installing a wheel on your Chevrolet vehicle, it is important to be aware of the manufacturer's recommended torque settings. Oil Filter LS1/LS2/LS6/LS7 22 ft. lbs. Here you can find information regarding the assembly of the 1500's braking system. Jeep CJ-Scrambler 1971-86 Wiring Diagrams Repair Guide. This information includes These engines are strong and durable. Passenger Capacity 5. The base 6.0 liter V8 was put in the Chevy Silverado 1500HD, 2500HD and 3500HD from 2001 through 2006. This is best done with a bottle jack under the suspension. Premature tire wear is something to be on the lookout for. Below are the most common questions about the LS-series family of motors, including LS engine specs. 37 ft-lbs. start from the inside of the engine including the Find out how to access AutoZone's Torque Specifications Repair Guides. / LS2/LS3/LS7 89 inch lbs. / LS2/LS3/LS7 15 ft. lbs. 12 Ft-Lbs. Front Shock Upper Nut Torque Spec. Camshaft Retainer Bolts Hex Head 18 ft. lbs. This engine produced 300 horsepower at 4,400 rpm and 360 foot-pounds of torque at 4,000 rpm. The Colorado/Canyon trucks in the North American market offer both manual and automatic transmissions.GM also offers either a rear-wheel drive (4x2) or four-wheel drive (4x4) drivetrain with standard, extended, and four-door crew-cab body styles. Chevy Silverado 2500 Front Caliper Slide Bolts Torque Specs : 80 ft-lbs Chevy Silverado 2500 Front Caliper Bracket Torque Specs : 221 ft-lbs VEHICLE TYPE Front-engine, 4-wheel-drive, 5-passenger, 4-door pickup. 2000 Chevy Silverado 1500 4.3L Engine Torque Specs| Chevy Specs crankshaft, connecting rods, and piston ring installation and then move outwards all the way to the pulley belt Valve Lifter Guide Bolts LS2 89 inch lbs. Factory Torque Settings for Chevy Silverado 3 (2014-2018) - TightTorque 11-06-2009, 04:38 PM. Need Pitman and Idler torque specs | Diesel Place Full Dimensions. Crankshaft Bearing Cap To Engine Block Retaining Bolt (10mm -First Pass in Sequence) LS3 15 ft. lbs. On the upper control arm the frame bolts need to be tightened up to 140 ft-lbs. Crankshaft Bearing Cap Bolts (Inner Bolts-Final Pass in Sequence) LS1/LS6 +80 degrees. They are What is the torque sequence for a 2003 chevy silverado 1500 intake manifold. Crankshaft Balancer Bolt (Step 1 Pass-to Ensure the Balancer Completely Installed) LS1/LS2/LS6 240 ft. lbs. The tables after it contain all torque spec values I could find. will be given to aid in the assembly of the engine. Social Connection. 2003 Chevrolet Silverado 1500 Specifications - The Car Connection Tim's Auto Repair. 2003 Chevy Silverado 1500 4.8L Engine Torque Specs| Chevy Specs Cylinder Head Bolts (Second Pass all M11 Bolts in Sequence -First Design) LS1/LS6 +90 degrees, Cylinder Head Bolts (Final Pass all M11 Bolts in Sequence-Excluding the Medium Length Bolts at the Front and Rear of Each, Cylinder Head - First Design) LS1/LS6 +90 degrees, Cylinder Head Bolts (Final Pass M11 Medium Length Bolts at the Front and Rear of Each Cylinder Head in Sequence First Design) LS1/LS6 +50 degrees. Sierra, Silverado 4WD 03 - 01 155 210 Sierra, Silverado 4WD 00 - 99 155 210 Some of our partners may process your data as a part of their legitimate business interest without asking for consent. sealed. Finally, remove the internal components; noting the cylinder # each one belongs to and noting the orientation of parts. For a better experience, please enable JavaScript in your browser before proceeding. / LS2/LS3 18 ft. lbs. with the repair procedures we also include the corresponding bolt torque specs for each fastener involved. Valve Rocker Arm Cover Bolts LS1/LS2/LS3/LS6/LS7 106 inch lbs. The listing of procedures will begin Water Pump Cover Bolts LS1/LS6 11 ft. lbs. Silverado, C/K, 1999-2005 Torque Specifications. 2024 Chevrolet Silverado HD | Heavy Duty Truck Pace Performance. 2003 Chevy Silverado 1500 5.3L Brake Torque Specs| Chevy Specs There are 2 bolts with nuts that hold the control arms to the vehicle frame. 2003 Chevy Silverado 2500 Rear End Torque Specs. the least common repairs that are needed. ** Plus additional torque to align cotter pin. Second step to 106 inch lbs. The stock cam specs at .050 lift are: 190/191 duration, .466/.457 lift, 114 LSA, 112/116 Timing Applications: Year(s) Model Power Torque Dyno Chart . Finally, a proper start-up and break-in period should be followed per instructions. All of these repairs and Spindle Nut Torque Specifications Application Model Year Range Location Part Number Torque (ft.lbs/Nm) Corvette 2003 - 1997 Rear 512153 118/160 Impala 2001 - 2000 Front 513121 151/205 Impala 2003 - 2001 Front 513179 159/215 Torque Specifications Archives - AutoZone Get Exclusive Online Offers! 140 ft-lbs. 2003 - 2007 Chevrolet Silverado. Engine Valley Cover Bolts LS1/LS6 18 ft. lbs. SAE Net Torque @ RPM 260 . Coolant Temperature Gauge Sensor LS1/LS2/LS3/LS6/LS7 15 ft. lbs. Crankshaft Bearing Cap Bolts (M10 studs -First Pass in Sequence) LS2/LS7 15 ft. lbs. . These Chevy Express Torque Specs . PDF Spindle Nut Torque Specifications - DannysEnginePortal.com Gas Mileage 15 mpg City/20 mpg Hwy. Exhaust Manifold Bolts (Final Pass) LS1/LS6 18 ft. lbs. 03 VW Jetta TDI (Wife Crashed it) 200K+ miles, 40-45 MPG. Clicking this will make more experts see the question and we will remind you when it gets answered. PDF Axle / Spindle Nut Torque Specification BHA53891 - 1A Auto 2003 Silverado 1500 specs (horsepower, torque, engine size, wheelbase), MPG and pricing by trim level. 1999 - 2007 Chevy Silverado 1500 5.3L Torque Specs Find out how to access AutoZone's Torque Specifications Repair Guide for Kia Sorento 2003-05. The 2004-2007 engines made 295 hp (220 kW) and 335 lbft (454 Nm) of torque. Gm Axle Nut Torque SpecsFWD FRONT AXLE NUT TORQUE SPECIFICATIONS Front I still have a leak and don't want to break the bolts. PDF Chevy Express Torque Specs - yearbook2017.psg.fr Timing Chain Tensioner to engine block retaining Bolt LS3 18 ft. lbs. Gen VI Big Block Chevy Engine Specs. I need to retorque everything on my truck also, havent done it since I put the kit on. ___________________________________________________________________, Back To Chuck's Chevy Truck Pages - Home guides are intended to assist in each procedure to help diyers with the job. Here you can find information regarding the assembly of the Chevy 4.8L OHV engine. Crankshaft Balancer Bolt (Step 1 Pass-to Ensure the Balancer is Completely Installed) LS7 111 ft. lbs. 04 CCSB Silverado - Leveled/33s/XD 20x9 -12/CM'd/Magnaflow exhaust 12 CCSB Sierra - Leveled/33s/RBP 20x9 +0/BTR S2V2 Cam/DOD&VVT Delete/MIT/Magnaflow/BB Tune . Here you can find information regarding the assembly of the Chevy 4.3L OHV engine. 15 ft-lbs. The rod bolts should continue to be tightened using two. In addition, prepare for the rebuild by obtaining parts such as a gasket kit, oil pump, bearings, and any replacement or upgraded aftermarket components. Once the engine is reassembled, it can be reinstalled into the vehicle. TrailFX 2"-3" Front Leveling Torsion Key Kit. Feel free to start from the beggining and work your way Ram B1500, B2500, B3500, 1999-2003 Torque Specifications Repair Guide. lbs.) Complete LS1 Engine Torque Specs [5.3, 6.0 & More Explained] - JEGS How To: Replace Sway Bar Links on a 1999-2007 GMC Sierra + Chevy Silverado An example of data being processed may be a unique identifier stored in a cookie. outwards or skip ahead to your current position in the engine for what you may need. For Axle U-Bolt General Motors LS-based small-block engine - Wikipedia Forced induction or turbocharging has been around for a long time, and there are many different ways to set up a turbo system. / LS3 3/4 to 1 full turn after gasket touches mount flange. system. gets tightened down to 37 ft-lbs. Cylinder Head Core Hole Plug LS1/LS6 15 ft. lbs. Once you sign in, follow these instructions to access our . crankshaft, connecting rods, and piston ring installation and then move outwards all the way to the pulley belt Crankshaft Balancer Bolt (Step 4 Final Pass bolt with flanged head) LS3 +125 degrees. -- Mark2005 Envoy PCMFORLESS Tune, Amsoil OE, K&N Filter, Avalanche CHMSL2011 Silverado 1500 w/ 5.3L V8. 43.1 in. May 7, 2016. Connecting Rod Bolts - (First Pass) LS1/LS2/LS6 15 ft. lbs. Specs; Profile; Balance Shaft Sprocket To Balance Shaft. Most models come with the 2.8 L (171 cu in) LK5 I4 engine as standard, but a more powerful 3.5 I5 comes with the Z71 package on four-door versions . 59 ft-lbs. The following list identifies which LS engines were installed in GM / Chevy cars, trucks, and SUVs, as well as VIN codes, LS engine horsepower & torque ratings, specs, and additional info: LS1 / 5.7 Liter VIN G, 1997-2000 345 HP / 350 TQ, 2001-2004 350 HP / 365 TQ, Aluminum Block / Heads (Cathedral Port) , 3.898 Bore 3.622 Stroke, -1998-2002 Pontiac Firebird Formula, Trans Am, LS6 / 5.7 Liter VIN S, 2001 385 HP / 385 TQ, 2002-2005 405 HP / 400 TQ, Aluminum Block / Heads (Cathedral Port) , 3.898 Bore 3.622 Stroke, LR4 / 4.8 Liter VIN V, 1999 - 255 HP / 285 TQ, 2000-2007 Between 270285 HP / 285295 TQ, Cast Iron Block, Aluminum Heads (Cathedral Port), 3.78 Bore 3.27 Stroke, -1999-2006 Chevrolet Silverado / GMC Sierra 1500 Pickup Trucks, -2000-2006 Chevrolet Tahoe / GMC Yukon Full-Size SUVs, -2003-2006 Chevrolet Express / GMC Savana Vans, -2007 Classic Chevrolet Silverado / GMC Sierra 1500 Pickup Trucks, LM7 / 5.3 Liter VIN T, 1999 - 270 HP / 315 TQ, 2000-2003 - 285 HP / 325 TQ, 2004-2007 - 295 HP / 335 TQ, Cast-Iron Block/Aluminum Heads (Cathedral Port), 3.78 Bore 3.62 Stroke, 19992007 Chevrolet Silverado / GMC Sierra 1500 Pickup Trucks, 20002006 Chevrolet Suburban / Tahoe & GMC Yukon / Yukon XL 1500 SUVs, 20022006 Chevrolet Avalanche Pickup Trucks, 20032007 Chevrolet Express/GMC Savana Vans, L59 / 5.3 Liter VIN Z, Flex-Fuel, 2002-2003 = 285 HP / 320 TQ, 2004-2007 = 295 HP / 335 TQ, Cast-Iron Block/Aluminum Heads (Cathedral Port), 3.78 Bore 3.62 Stroke, 20022006 Chevrolet Tahoe/GMC Yukon & 20022006 Chevrolet Suburban/GMC Yukon XL 1500 SUVs, 20022007 Chevrolet Silverado 1500 / GMC Sierra 1500 & Chevrolet Avalanche Z71 Pickup Trucks, LM4 / 5.3 Liter VIN P, 2003-2005 - 290 HP / 325 TQ, Aluminum Block / Heads (Cathedral Port), 3.78 Bore 3.62 Stroke, 2003-2004 Chevrolet SSR / GMC Envoy XL Pickup Trucks & SUVs, L33 / 5.3 Liter VIN B, 2005-2007 - 310 HP/335 TQ, Aluminum Block / Heads (Cathedral Port), 3.78 Bore 3.62 Stroke, 20052007 Chevrolet Silverado / GMC Sierra 1500 4WD Extended Cab Pickup Trucks, LQ4 / 6.0 Liter VIN U, 1999-2000 300-325 HP/360-370 TQ, Cast-Iron Block/Heads (Cathedral Port), 4.00 Bore 3.62 Stroke, 1999-2000 Chevrolet Express/GMC Savana Vans, 1999-2000 Chevrolet Suburban/GMC Yukon XL Denali SUVs, 1999-2000 Chevrolet Silverado / GMC Sierra 2500 HD, 3500 Crew Cab & Chassis Cab and 1500HD Crew Cab Pickup Trucks, LQ9 / 6.0 Liter VIN N, 2002-2007 345 HP / 380 TQ, Cast-Iron Block / Aluminum Heads (Cathedral Port), 4.00 Bore 3.62 Stroke, 20022006 Cadillac Escalade AWD & EXT SUVs, 20032007 Chevrolet Silverado SS Pickup Trucks, 20042006 Chevrolet Silverado / GMC Sierra Vortec HO Edition, Performance Edition, 2005-2006 GMC Sierra Denali pickup trucks and Yukon Denali SUVs, 2007 Classic Chevrolet Silverado / GMC Sierra VortecMAX & Performance Edition pickup trucks, LS2 / 6.0 Liter VIN H, 2005 -2009 400 HP / 400 TQ, Aluminum Block/Heads (Cathedral Port), 4 Bore x 3.622 Stroke, L76 / 6.0 Liter VIN Y, Active Fuel Management (AFM) / Displacement On Demand (DOD), 2007-2009 361-367 HP / 375-385 TQ, Aluminum Block/Heads (Rectangle Port), 4 Bore x 3.622 Stroke, 20072009 Chevrolet Silverado / Suburban / Avalanche & GMC Sierra / Yukon XL Pickup Trucks & SUVs, L77 / 6.0 Liter VIN 2, Flex Fuel, Active Fuel Management (AFM) / Displacement On Demand (DOD), 2011-2017 362 HP / 391 TQ, Aluminum Block/Heads (Rectangle Port), 4 Bore x 3.622 Stroke, 2011-2017 Chevrolet Caprice Police Pursuit Vehicles, LY6 / 6.0 Liter VIN K, 2007 -2013 361 HP / 385 TQ, Variable Valve Timing (VVT), Cast Iron Block/ Aluminum Heads (Rectangle Port), 4 Bore x 3.622 Stroke, 20072009 Chevrolet Silverado HD / GMC Sierra HD pickup trucks, 20072013 Chevrolet Suburban 2500 / GMC Yukon XL 2500 SUVs, L96 / 6.0 Liter Flex-Fuel VIN G, 2010-2020 - 361 HP / 385 TQ, Variable Valve Timing (VVT), Cast Iron Block/ Aluminum Heads (Rectangle Port), 4 Bore x 3.622 Stroke, 20102013 Chevrolet Suburban 2500 / GMC Yukon XL 2500 SUVs, 20102019 Chevrolet Silverado HD / GMC Sierra HD Pickup Trucks, 20102020 Chevrolet Express / GMC Savana Vans, LFA / 6.0 Liter Hybrid VIN 5, 20082009 332 HP / 367 TQ, Aluminum Block/Heads (Rectangle Port), 4 Bore x 3.622 Stroke, 20082009 Chevrolet Tahoe Hybrid / GMC Yukon / Cadillac Escalade Hybrid SUVs, 2008-2009 Chevrolet Silverado Hybrid / GMC Sierra Hybrid Pickup Trucks, LZ1 / 6.0 Liter Hybrid / Active Fuel Management (AFM) / Variable Valve Timing (VVT), VIN J, 2010-2013 - 332 HP / 367 TQ, Aluminum Block/Heads (Rectangle Port), 4 Bore x 3.622 Stroke, 20102013 Chevrolet Tahoe Hybrid / GMC Yukon Hybrid / Cadillac Escalade Hybrid SUVs, 20102013 Chevrolet Silverado Hybrid / GMC Sierra Hybrid pickup trucks, LY2 / 4.8 Liter VIN C, 2007-2009 260-295 HP / 295-305 TQ, Cast-Iron Block/ Aluminum Heads (Cathedral Port), 3.78 Bore 3.27 Stroke, 20072009 Chevrolet Silverado / GMC Sierra pickup trucks, 20072009 Chevrolet Tahoe / GMC Yukon SUVs, 20082009 Chevrolet Express/GMC Savana Vans, L20 / 4.8 Liter VIN A, Variable Valve Timing (VVT), 2010 2017 260-302 HP / 295-305 TQ, Cast Iron Block, Aluminum Heads (Cathedral Port), 3.78 Bore 3.27 Stroke, 20102013 Chevrolet Silverado / GMC Sierra pickup trucks, 20102017 Chevrolet Express/GMC Savana Vans, LMF / 5.3 Liter VIN 4, 2010-2014 301 HP / 325 TQ, 3.78 Bore x 3.622 Stroke, Cast Iron Block / Aluminum Heads (Cathedral Port), 2010-2014 Chevrolet Express 1500 AWD / GMC Savana 1/2 ton AWD vans, L94 / 6.2 Liter - VIN F, Active Fuel Management (AFM), Variable Valve Timing (VVT), 2010-2014 - 403 HP / 417 TQ, 4.065 Bore x 3.622" Stroke, Aluminum Block / Aluminum Heads (Rectangle Port), 2010 - 2014 Cadillac Escalade ESV / EXT , GMC Yukon / Yukon XL, LH6 / 5.3 Liter VIN M, Active Fuel Management (AFM), 2005-2009- 300-315 HP / 330-338 TQ, Aluminum Block/Heads (Cathedral Port), 3.78 Bore x 3.622 Stroke, 20052009 Chevrolet Trailblazer / Trailblazer EXT (2005-2006) / GMC Envoy Denali SUVs, 2007-2009 Chevrolet Silverado 1500 / GMC Sierra 1500, LY5 / 5.3 Liter VIN J, 2007-2014 315-320 HP / 335-340 TQ (pickups), 320 HP / 340 TQ (SUVs), Cast Iron Block / Aluminum Heads (Cathedral Port), 3.78 Bore x 3.622 Stroke, 20072013 Chevrolet Silverado 1500 & Avalanche / GMC Sierra 1500 pickup trucks, 20072014 Chevrolet Suburban 1500 & Tahoe / GMC Yukon & Yukon XL 1500, LMG / 5.3 Liter VIN 0, flex fuel, 2010-2014 -Variable Valve Timing (VVT), 2007-2014 - 315-320 HP / 335-340 TQ (pickups), 320 HP / 340 TQ (SUVs), Cast Iron Block / Aluminum Heads (Cathedral Port), 3.78 Bore x 3.622 Stroke, 20072013 Chevrolet Silverado 1500 & Avalanche / GMC Sierra 1500, LC9 / 5.3 Liter VIN 3 or 7, flex fuel, 2010-2014 Variable Valve Timing (VVT), 2007-2014 315 HP / 335 TQ (Pickups), 320 HP / 335 TQ (SUVs), Aluminum Block / Heads (Cathedral Port), 3.78 Bore x 3.622 Stroke, 20072013 Chevrolet Avalanche, Silverado 1500 / GMC Sierra 1500 4WD pickup trucks, 20072014 Chevrolet Suburban 1500 / GMC Yukon XL 1500 4WD SUVs, LH8 / 5.3 Liter VIN L, 2008-2009 300 HP / 320 TQ, Aluminum Block / Heads (Cathedral Port), 3.78 Bore x 3.622 Stroke, 20082009 Hummer H3 Alpha off-road vehicle, 2009 Chevrolet Colorado/GMC Canyon pickup trucks, LH9 / 5.3 Liter VIN P, Flex-Fuel, Variable Valve Timing (VVT), 2010-2012 300 HP / 320 TQ, Aluminum Block / Heads (Cathedral Port), 3.78 Bore x 3.622 Stroke, LS4 / 5.3 Liter VIN C, Active Fuel Management (AFM), 2005-2009 303 HP / 323 TQ, 3.78, Aluminum Block / Heads (Cathedral Port), Bore x 3.622 Stroke, LS7 / 7.0 Liter VIN E, 2006-2015 505 HP / 470 TQ, Aluminum Block / Heads (Raised Rectangle Port), 4.125 Bore x 4 Stroke, L92 / 6.2 Liter VIN 8, Variable Valve Timing (VVT), 2007-2013 403 HP / 415-417 TQ, Aluminum Block/Heads (Rectangle Port), 4.065 Bore x 3.622 Stroke, 2007-2013 GMC Yukon Denali/Denali XL & Sierra Denali, L9H / 6.2 Liter - VIN 2, Variable Valve Timing (VVT), 2009 - 2013 - 403 HP / 417 TQ, Aluminum Block / Heads (Rectangle Port), 4.065" Bore x 3.622" Stroke, 2009 Cadillac Escalade ESV / EXT , Chevrolet Tahoe LTZ, GMC Yukon Denali, 2009 - 2013 GMC Yukon XL 1500 SLT, Sierra 1500 Denali / SLE / SLT, 2010-2013 Chevrolet Silverado 1500 LT / LTZ, LS3 / 6.2 Liter VIN W, 2008-2017 - 430 HP / 424 TQ, Aluminum Block /Heads (Rectangle Port), 4.065 Bore x 3.622 Stroke, 20102015 Chevrolet Camaro SS (manual transmission only), L99 / 6.2 Liter VIN J, Active Fuel Management (AFM), Variable Valve Timing (VVT), 2010-2015 400 HP / 410 TQ, Aluminum Block / Heads (Rectangle Port), 4.065 Bore x 3.622 Stroke, 20102015 Chevrolet Camaro SS (Automatic Transmission only), LS9 / 6.2 Liter, Supercharged VIN T, 2009-2013 638 HP / 604 TQ, Aluminum Block / Heads (Rectangle Port), 4.065 Bore x 3.622 Stroke, LS Performance Engine, LSA / 6.2 Liter, Supercharged VIN P, 2009-2015 556 HP / 551 TQ, Aluminum Block / Heads (Rectangle Port) , 4.065 Bore x 3.622 Stroke, LS Performance Engine, 12480030 - 2003-2004 GM Performance Products non-production block12550592 - 1997-1999 LS112551358 - 1998-1999, 2001-2005 LM7 / LR412551364 - 1998-1999 LQ4, 2001-2005 LQ4/LQ912559090 - 1998 LS112559378 - 2000-2002 LS112559846 - 1998-2000 LS112560626 - 2000 LS112561166 - 2001 LS1/LS612561168 - 2001-2004 LS1/LS612562735 - 2005 L33 / LS212566910 - 2003-2005 LM412567392 - 2002-2005 LM7 / LR412567393 - 2005 LM7 / LR412573581 - 2002-2005 LQ4/LQ912577184 - 2005 LQ4/LQ9, casting # ending in 241 - LS1 , with 2.00 / 1.55 valves, 67cc chambers, cathedral ports, casting # ending in 243,799, and 823 - LS1/LS6 , with 2.00 / 1.55 valves, 65cc chambers, cathedral ports, casting # ending in 706, 862, and 895 LM4/LM7/LR4 , with 1.89 / 1.55 valves, 61cc chambers, cathedral ports, casting # ending in 853, 806, and 933 - LS1 , with 2.00 / 1.55 valves, 67cc chambers, cathedral ports, casting # ending in 317 and 035 LQ4/LQ9 , with 2.00 / 1.55 valves, 71cc chambers, cathedral ports, casting # ending in 373 and 873 LQ4 , with 2.00 / 1.55 valves, 71cc chambers, rectangle ports, casting # ending in 364, 716, and 823 L92/LS3 , with 2.165 / 1.590 valves, 68cc chambers, rectangle ports, casting # ending in 452 LS7 , with 2.20 / 1.610 valves, 70cc chambers, rectangle (raised) ports.