Ls cylinder head torque specs

Alternator Rear Bracket Torque Spec. 18 ft-lbs. A/C Compressor Torque Spec. 37 ft-lbs. 2500 6.0L engine bolt torque specs, common problems and repairs. Cylinder Head Torque specs, timing chain installation, manifolds torque specs, engine assembly.

LS1 Cylinder Head Specs. 1997-1998 Casting Numbers (Perimeter Valve Cover Bolts) 10215339, 12550592, 12558806. 1999-2004 Casting Numbers (Center Valve Cover Bolts) 12559853, 12558805, 12560621, 12562174, 12564241. Material.Head Bolt Kit: 134-3710: Chevrolet LSA, ARP2000, 12pt: Head Bolt Kit: 234-3726: Chevrolet LS Gen III LS Series small block (2004 & later - except LS9) w/ all same length bolts, ARP2000, 12pt: Head Bolt Kit: 234-3725: Chevrolet LS Gen III LS Series small block (2003 & earlier), two lengths, ARP2000, 12pt: Head Bolt Kit: 234-3724: Chevrolet LSA ...The Quadro series is a line of workstation graphics cards designed to provide the selection of features and processing power required by professional-level graphics processing soft...The recommended torque spec for a 5.3 L head is 30-35 ft/lbs, using an angle of 15 degrees while tightening each bolt in sequence as specified by your vehicle’s manufacturer. It’s important to note that these are only guidelines, so always consult your service manual before beginning any repair work on your vehicle’s engine!All LS cylinder heads have performance potential, but as with any aspect of engine building, the end goal determines the starting point. Aside from the material, combustion chamber size and port style, the valve size and weight can differ, and the valve angle is different on certain heads, as well as details such as valve cover bolt location.

The oil pump assembly should be tightened down to the engine block using 18 ft-lbs. The pumps cover bolts can be installed after lubing up the oil pump gear. The oil pump cover bolts torque down to 8 ft-lbs. On the bottom end of the pump the pickup tube can be installed and torqued down to the pump using 8 ft-lbs. Gently set the cylinder head on top of the head gasket. Be sure it sits properly on the dowels. Take care not to nick or scratch the deck surface of the head. Install all the bolts finger-tight. Torque the M11 bolts (#1-10) in 3 passes. See below for torque specs and sequence. Use a quality Torque Wrench and Torque Angle Gauge. 18 ft-lbs. A/C Compressor Torque Spec. 37 ft-lbs. tahoe 5.3L engine bolt torque specs, common problems and repairs. Cylinder Head Torque specs, timing chain installation, manifolds torque specs, engine assembly.165 posts · Joined 2008. #10 · Aug 29, 2008. i used arp bolts torqued 25, 45, 65 in sequence of course. the arp specs were around there depending on what you put on the threads. i also used some fel pro stock replacements before that torqued to about 60-65 as well. the haynes manual says pre-95 torqued to 65 ft/lbs. 96-97 torqued to 22 and …Now, the LS head torque specs ft lbs are easy to understand, but the LS cylinder head bolt torque is also expressed in degrees for the second and third passes. For example, if the torque spec says 90°, it means you need to turn the bolt clockwise 90° degrees or a quarter of a turn.The oil pump assembly should be tightened down to the engine block using 18 ft-lbs. The pumps cover bolts can be installed after lubing up the oil pump gear. The oil pump cover bolts torque down to 8 ft-lbs. On the bottom end of the pump the pickup tube can be installed and torqued down to the pump using 8 ft-lbs.18 ft-lbs. A/C Compressor Torque Spec. 37 ft-lbs. 1500 5.3L engine bolt torque specs, common problems and repairs. Cylinder Head Torque specs, timing chain installation, manifolds torque specs, engine assembly.Power Steering Pump Bolts Torque Spec. 18 ft-lbs. A/C Compressor to Block Torque Spec. 15 ft-lbs. cobalt 2.2L engine bolt torque specs, common problems and repairs. Cylinder Head Torque specs, timing chain installation, manifolds torque specs, engine assembly.

0. Whenever you are looking to build your own LS swap or frankenstein LS heads and block combination, you will need the factory LS1 Torque Specifications to assemble your block correctly. Cylinder Head …Chevy Silverado 1500 5.3L Cylinder Head Torque Specs (Longest M11): 22 ft-lbs + 90° + 90° Timing Chain and Camshaft Installation On the Chevy 5.3 OHV engine the timing system is ran by the use of a chain.The 5.7L LS6 is the most powerful Gen. 3 small block engine as it came from the factory. It is an improved version of the LS1 produced for the 2001 Z06 Corvette. The LS6 powered the 2001-04 Corvette Z06 and the 2004-05 Cadillac CTS-V. Mechanically similar, General Motors’ LS and LS-based Vortec engines wound up on almost every …Chevy Cruze 1.8L Cylinder Head Torque Specs : 18 ft-lbs + 90° + 90° + 90° + 45° Timing Belt and Tensioner Installation On the Chevy 1.8 engine the timing system is ran by the use of a timing belt.The updated sequence and specification is as follows: • Tighten the cylinder head bolts to 44 ft.lbs (60 N-m) in the order shown in illustration. Use the J 36660-A torque angle meter in order to rotate the cylinder head bolts an additional 95 degrees.. Please note that 95° is just a little more than a 1/4 turn, not 1/2 turn, or from 12 o’clock to … Power Steering Pump Bolts Torque Spec. 18 ft-lbs. A/C Compressor to Block Torque Spec. 15 ft-lbs. equinox 2.4L engine bolt torque specs, common problems and repairs. Cylinder Head Torque specs, timing chain installation, manifolds torque specs, engine assembly.

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The oil pump assembly should be tightened down to the engine block using 18 ft-lbs. The pumps cover bolts can be installed after lubing up the oil pump gear. The oil pump cover bolts torque down to 8 ft-lbs. On the bottom end of the pump the pickup tube can be installed and torqued down to the pump using 8 ft-lbs.Cylinder Head Bolts (First Pass all M11 Bolts in Sequence) 22 lb ft: Cylinder Head Bolts (Second Pass all M11 Bolts in Sequence) 90 degrees: Cylinder Head Bolts …DGAP Preliminary announcement financial reports: LS telcom AG / Preliminary announcement on the disclosure of financial statements LS telcom A... DGAP Preliminary announcement fin...Alternator Rear Bracket Torque Spec. 18 ft-lbs. A/C Compressor Torque Spec. 37 ft-lbs. 3500 6.0L engine bolt torque specs, common problems and repairs. Cylinder Head Torque specs, timing chain installation, manifolds torque specs, engine assembly.Chevy Silverado 1500 5.3L Cylinder Head Torque Specs (Longest M11): 22 ft-lbs + 90° + 90° Timing Chain and Camshaft Installation On the Chevy 5.3 OHV engine the timing system is ran by the use of a chain.

The head bolts play a vital role in securing the cylinder head to the engine block, ensuring a tight seal and preventing any leaks. ARP (Automotive Racing Products) is a trusted manufacturer of high-performance fasteners, including head bolts, and provides specific torque specifications for the LS1 engine. Torque Specifications To find out a wheel torque spec, check the vehicle’s manual, industry reference guide or the shop repair manual. Vehicle dealers can also provide an appropriate wheel torque spec. ...The LC9 engine is a 5.3L, Gen. 4, aluminum small block engine used in GM trucks and SUVs between 2007-2011. For marketing purposes, it was also known as the Vortec 5300. The engine specs and …Power Steering Pump Bolts Torque Spec. 18 ft-lbs. A/C Compressor to Block Torque Spec. 15 ft-lbs. malibu 2.5L engine bolt torque specs, common problems and repairs. Cylinder Head Torque specs, timing chain installation, …Small Block Chevy Head Bolt Torque Specifications. Step 1 25 Ft/Lbs. Step 2 45 Ft/Lbs. Step 3 65 Ft/Lbs. For Head Studs or aftermarket bolts CHECK YOUR INSTRUCTIONS, SBC studs are available in a ton of. different styles depending on heads and stud diameters. Some People do only 1 or 2 steps to reach the final torque.The L76—like its LS2 sibling—is a 6.0L, Gen. 4, aluminum small block engine that was used both in GM cars and trucks. The L76 is an adapted version of the LS2, featuring new rectangle port cylinder heads and Active Fuel Management (AFM). The L76 was available in the Pontiac G8 GT from 2007-09.Advertisement The variety of Android tablets on the market make it difficult to sum up specifications. Android tablets are really just specialized computers. In general, most table...Cylinder Head Bolts: M11 x 2.0 x 155.5: 22 ft.-lbs. 90 degrees: 90 degrees: M11 x 2.0 x 101.0: 50 degrees: M8 x 1.25 x 46.0--22 ft.-lbs. Rocker Arm Bolts-- ... Fasteners that list an angle are Torque to Yield (TTY). The specs listed are for stock fasteners. If you use ARP or other aftermarket fasteners, ...

The oil pump assembly should be tightened down to the engine block using 18 ft-lbs. The pumps cover bolts can be installed after lubing up the oil pump gear. The oil pump cover bolts torque down to 8 ft-lbs. On the bottom end of the pump the pickup tube can be installed and torqued down to the pump using 8 ft-lbs.

The LS4 engine is a Gen. 4, 5.3L, aluminum small block engine used in GM cars between 2005 and 2009. It is unique because it was the only LS engine used in FWD vehicles. The LS4 had cathedral port cylinder heads and used Active Fuel Management (AFM). The engine was not Flex Fuel (E85) capable and did not use Variable Valve Timing (VVT) technology.AIR Right Side Pipe Bracket-to-Cylinder Head Bolt 20Y 15lbft Automatic Transmission Fluid Cooler Line Clamp Bolt – at Oil Pan 12Y 106lbin ... Specification …Nov 21, 2023 · 862 heads do offer some benefits over stock cylinder heads, such as being more durable and less prone to cracking. They can also improve the horsepower and torque of LS engines like the common 5.3L and 6.0L variants, especially with the right supporting mods, such as camshafts, intake manifolds, headers, and tuning. With 862 heads, these ... 0. Whenever you are looking to build your own LS swap or frankenstein LS heads and block combination, you will need the factory LS1 Torque Specifications to assemble your block correctly. Cylinder Head Bolts : 11mm x 20.0 x 155.5mm bolts: 22 ft-lb, plus 76 degrees. 11mm x 20.0 x 101.0 mm bolts: 22 ft-lb, plus 76 degrees, plus 34 degrees.The head bolts play a vital role in securing the cylinder head to the engine block, ensuring a tight seal and preventing any leaks. ARP (Automotive Racing Products) is a trusted manufacturer of high-performance fasteners, including head bolts, and provides specific torque specifications for the LS1 engine. Torque SpecificationsThe L20 4.8L has a 3.780 in. bore diameter. The cylinders can be bored to LS1 size (3.898 in. +). However, that will thin out the cylinder walls. A smaller bore size will keep the block strong and rigid. The engine specs and information listed below is for the stock L20 engine. Mechanically similar, General Motors’ LS and LS-based Vortec ...The LC9 engine is a 5.3L, Gen. 4, aluminum small block engine used in GM trucks and SUVs between 2007-2011. For marketing purposes, it was also known as the Vortec 5300. The engine specs and …

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The specs listed are for stock fasteners. If you use ARP or other aftermarket fasteners, follow the instructions that came with your new hardware. Related Products: Camshafts & Valvetrain, Cylinder Heads, Engine Assemblies, Oiling Systems, Other Engines & Components, Pistons & Piston Rings, Valve Covers & Dress-Up Kits The oil pump assembly should be tightened down to the engine block using 18 ft-lbs. The pumps cover bolts can be installed after lubing up the oil pump gear. The oil pump cover bolts torque down to 8 ft-lbs. On the bottom end of the pump the pickup tube can be installed and torqued down to the pump using 8 ft-lbs. Cathedral port cylinder heads have been mistakenly dismissed by many in LS-series circles for being “old-tech.” However, their thin cross-section allows for a high-velocity and smaller-volume runner design with excellent flow. For a street car, this design means excellent throttle response, torque and average power. Dyno tests have proven …Chevy Silverado 1500 5.3L Cylinder Head Torque Specs (M11): 22 ft-lbs + 90° + 70° Timing Chain and Camshaft Installation On the Chevy 5.3 OHV engine the timing system is ran by the use of a chain.we at QUICKTIMES mechanic are not liable for any damages, repairs, injuries. we created videos for educational purposes only, be safe and cheersToday I installed and torqued down my LS1 cinder heads for my ls swapped is300 projectChevrolet Orange Engine Painthttps://amzn.to/3hIh21DICT Billet Exhaust ...Alternator Rear Bracket Torque Spec. 18 ft-lbs. A/C Compressor Torque Spec. 37 ft-lbs. 2500 6.0L engine bolt torque specs, common problems and repairs. Cylinder Head Torque specs, timing chain installation, manifolds torque specs, engine assembly.The LC9 engine is a 5.3L, Gen. 4, aluminum small block engine used in GM trucks and SUVs between 2007-2011. For marketing purposes, it was also known as the Vortec 5300. The engine specs and information listed here is for a stock LC9 engine. Mechanically similar, General Motors’ LS and LS-based Vortec engines wound up on …Chevy Silverado 1500 5.3L Cylinder Head Torque Specs (Longest M11): 22 ft-lbs + 90° + 90° Timing Chain and Camshaft Installation On the Chevy 5.3 OHV engine the timing system is ran by the use of a chain.Today I installed and torqued down my LS1 cinder heads for my ls swapped is300 projectChevrolet Orange Engine Painthttps://amzn.to/3hIh21DICT Billet Exhaust ...Mar 22, 2019 · Object moved to here. ….

Crankshaft Position Sensor Bolt. 18 lb ft. Cylinder Head Bolts (First Pass all M11 Bolts in Sequence) 22 lb ft. Cylinder Head Bolts (Second Pass all M11 Bolts in Sequence) 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) 90 degrees.The 5.3 liter LS-series engine was offered from 1999-2014 and has a 3.78” bore x 3.62” stroke. The block was offered in both cast-iron and aluminum with aluminum cylinder heads. Camshaft specifications varied depending on the year and RPO code of the engine. The oil pump assembly should be tightened down to the engine block using 18 ft-lbs. The pumps cover bolts can be installed after lubing up the oil pump gear. The oil pump cover bolts torque down to 8 ft-lbs. On the bottom end of the pump the pickup tube can be installed and torqued down to the pump using 8 ft-lbs. Chevy Camaro 3.6L Cylinder Head Torque Specs (M8): 11 ft-lbs + 75° Timing Chain and Camshaft Installation On the Chevy 3.6 DOHC engine the timing system is ran by the use of 3 different timing chains. 2 of the chains run from idler sprockets up to each cylinder head in order to run the VVT camshaft sprockets.Jan 14, 2009 · 333 posts · Joined 2008. #5 · Jan 14, 2009. Just an FYI for those need new head bolts. You can buy the ARP head bolts, and you don't have to do any of that angle TQ'ing crap. Just 3 passes of TQ and she's done. There's about $100 more but not having to TQ angles is worth it to me. This is an older thread, you may not receive a response, and ... Chevy Silverado 1500 5.3L Cylinder Head Torque Specs (Longest M11): 22 ft-lbs + 90° + 90° Timing Chain and Camshaft Installation On the Chevy 5.3 OHV engine the timing system is ran by the use of a chain.333. black. 02 ss camaro. 15 mm bolts first pass torque of 22 ft/lbs. 2nd pass of 90 degrees on the 15 mm bolts. 3rd pass of 90 on the 15's except fot the 2 on the outside of the head under the valve cover...only 50 degrees on the 3rd pass for those 2 bolts. Then torque the 10 mm bolts to 22 ft/lbs.The L94 is a 6.2L, Gen. 4, small block engine used in GM luxury trucks and SUVs between 2010 and 2014. For marketing purposes, it was also known as the Vortec 6200. The engine specs and information listed here is for a stock L94 engine. Mechanically similar, General Motors’ LS and LS-based Vortec engines wound up on almost every …The LY6 engine is a 6.0L Gen. 4 small block engine used in GM trucks and SUVs between 2007 and 2010. For marketing purposes, it was also known as the Vortec 6000. The engine specs and information listed here is for a stock LY6 engine. Mechanically similar, General Motors’ LS and LS-based Vortec engines wound up on almost every …Chevy LS1 Engine Specs. Views: Performance Specifications. Compression Ratio: 10.2:1: Horsepower Rating: 305-350 hp: ... Cylinder Head Bolt Style: Torque to Yield (TTY) Ls cylinder head torque specs, Power Steering Pump Bolts Torque Spec. 18 ft-lbs. A/C Compressor to Block Torque Spec. 15 ft-lbs. equinox 2.4L engine bolt torque specs, common problems and repairs. Cylinder Head Torque specs, timing chain installation, …, Torque Specs Engine Parts/Bolts Torque: Camshaft Retainer Bolts 18 lb ft Camshaft Sensor Bolt 18 lb ft Camshaft Sprocket Bolts 26 lb ft Connecting Rod Bolts ... Cylinder …, All LS cylinder heads have performance potential, but as with any aspect of engine building, the end goal determines the starting point. Aside from the material, combustion chamber size and port style, the valve size and weight can differ, and the valve angle is different on certain heads, as well as details such as valve cover bolt location., Chevy Silverado 1500 5.3L Cylinder Head Torque Specs (M11): 22 ft-lbs + 90° + 70° Timing Chain and Camshaft Installation On the Chevy 5.3 OHV engine the timing system is ran by the use of a chain., The Quadro series is a line of workstation graphics cards designed to provide the selection of features and processing power required by professional-level graphics processing soft..., Oct 12, 2017 · LS1 Cylinder Head Specs. 1997-1998 Casting Numbers (Perimeter Valve Cover Bolts) 10215339, 12550592, 12558806. 1999-2004 Casting Numbers (Center Valve Cover Bolts) 12559853, 12558805, 12560621, 12562174, 12564241. Material. , Alternator Rear Bracket Torque Spec. 18 ft-lbs. A/C Compressor Torque Spec. 37 ft-lbs. 2500 6.0L engine bolt torque specs, common problems and repairs. Cylinder Head Torque specs, timing chain installation, manifolds torque specs, engine assembly. , Last updated on 12/29/2021. The LSA is a supercharged, Gen. 4, 6.2L, aluminum block engine. The engine specs and information listed here is for a stock LSA engine. Mechanically similar, General Motors’ LS and LS-based Vortec engines wound up on almost every branch of the GM family tree: Chevy, Pontiac, GMC, Cadillac, …, The L20 4.8L has a 3.780 in. bore diameter. The cylinders can be bored to LS1 size (3.898 in. +). However, that will thin out the cylinder walls. A smaller bore size will keep the block strong and rigid. The engine specs and information listed below is for the stock L20 engine. Mechanically similar, General Motors’ LS and LS-based Vortec ..., Importance of Proper Torque When a head gasket is installed between the cylinder head and engine block, tightening the head bolts compresses the gasket slightly, allowing the soft facing material on the gasket to conform to the small irregularities on the head and block deck surfaces. This allows the gasket to “cold seal” so it , When it comes to assembling the cylinder heads of the 6.0 LS engine, it is crucial to follow the recommended torque specifications for the head bolts. Proper torque ensures that …, Chevy Silverado 1500 5.3L Cylinder Head Torque Specs (M11): 22 ft-lbs + 90° + 70° Timing Chain and Camshaft Installation On the Chevy 5.3 OHV engine the timing system is ran by the use of a chain., 0. Whenever you are looking to build your own LS swap or frankenstein LS heads and block combination, you will need the factory LS1 Torque Specifications to assemble your block correctly. Cylinder Head Bolts : 11mm x 20.0 x 155.5mm bolts: 22 ft-lb, plus 76 degrees. 11mm x 20.0 x 101.0 mm bolts: 22 ft-lb, plus 76 degrees, plus 34 degrees., The Quadro series is a line of workstation graphics cards designed to provide the selection of features and processing power required by professional-level graphics processing soft..., Cylinder Head Bolts, 273-318: 85 ft.-lbs.* Cylinder Head Bolts, 340-360: 95 ft.-lbs.* Rocker Shaft Bracket Bolts: 17 ft.-lbs. Intake Manifold Bolts: 35 ft.-lbs. ... If you use aftermarket performance bolts like ARP's, you should follow the recommended torque specifications. Please note that some specifications are in inch-pounds, rather than ..., 2008 Corvette Z06. Torque specs for LS1 motors. Fastener Tightening Specifications Application. Specification. Metric / English. A/C Belt Tensioner Bolt. 25 Nm 18 lb ft. A/C Compressor and Condenser Hose Bolt (at Accumulator) 16 Nm 12 lb ft., Jun 28, 2023 · The recommended torque spec for a 5.3 L head is 30-35 ft/lbs, using an angle of 15 degrees while tightening each bolt in sequence as specified by your vehicle’s manufacturer. It’s important to note that these are only guidelines, so always consult your service manual before beginning any repair work on your vehicle’s engine! , Joe Cabral showing the proper torque sequence and proper torque of GM LS head bolts.All of Engine Quest LS Head boltsChevrolet Ls Head Bolts Set 2007 – 2016 ..., Chamfer the lead in of holes for the studs in the engine block and ensure the surface is flat & clean. Put a bit of anti seize on the coarse threads of the ..., Jan 21, 2022 · RPO L99 and LS3 cylinder heads are aluminum with 68cc combustion chambers, rectangle intake ports with 257cc runners, D-port exhaust with 87cc runners, 2.165˝ intake valves and 1.590˝ exhaust valves. These heads can be CNC-ported to improve on flow and milled for higher compression. These heads are almost the same, but the L99 heads used a ... , Head Bolt Kit: 234-3725: Chevrolet LS Gen III LS Series small block (2003 & earlier), two lengths, ARP2000, 12pt: Head Bolt Kit: 234-3724: Chevrolet LSA, Inconel, 12pt: Head Bolt Kit: 434-3713: Chevrolet LSA, ARP2000, hex: Head Bolt Kit: 234-3603: Chevrolet LS Gen III LS Series small block (2004 & later - except LS9) w/ all same length bolts ..., Jan 11, 2016 ... 5.7 dodge ram Hemi Head bolt torque sequence. The Clay Way · 83K views ; LS HEAD TORQUE SPECS / SEQUENCE for 4.8 5.3 5.7 6.0 6.2 7.0 ls1 ls2 ls3 ..., Fastener Specifications (LS3) Fastener Tightening Specifications Application Specification Metric English A/C Compressor Bracket to Engine Block Retaining Bolt ... Coolant Air Bleed Pipe and Hole Cover to Cylinder Head Retaining Bolt 12Y 106lbin Coolant Temperature Sensor 20Y 15lbft Crankshaft Balancer to Crankshaft …, 333 posts · Joined 2008. #5 · Jan 14, 2009. Just an FYI for those need new head bolts. You can buy the ARP head bolts, and you don't have to do any of that angle TQ'ing crap. Just 3 passes of TQ and she's done. There's about $100 more but not having to TQ angles is worth it to me. This is an older thread, you may not receive a response, and ..., Bolts at the Front and Rear of Each Cylinder Head 90degrees Cylinder Head Bolts – First Design – Final Pass M11 Medium Length Bolts at the Front and Rear of Each Cylinder Head 50degrees Cylinder Head Bolts – Second Design – First Pass all M11 Bolts in Sequence 30Y 22lbft Cylinder Head Bolts – Second Design – Second Pass all, Today I installed and torqued down my LS1 cinder heads for my ls swapped is300 projectChevrolet Orange Engine Painthttps://amzn.to/3hIh21DICT Billet Exhaust ..., Chevy Cruze 1.6L Cylinder Head Torque Specs : 18 ft-lbs + 90° + 90° + 90° + 45° Timing Belt and Tensioner Installation On the Chevy 1.6 engine the timing system is ran by the use of a timing belt., Object moved to here., Mar 22, 2019 · Object moved to here. , Power Steering Pump Bolts Torque Spec. 18 ft-lbs. A/C Compressor to Block Torque Spec. 15 ft-lbs. malibu 2.4L engine bolt torque specs, common problems and repairs. Cylinder Head Torque specs, timing chain installation, …, The oil pump assembly should be tightened down to the engine block using 18 ft-lbs. The pumps cover bolts can be installed after lubing up the oil pump gear. The oil pump cover bolts torque down to 8 ft-lbs. On the bottom end of the pump the pickup tube can be installed and torqued down to the pump using 8 ft-lbs., The third generation (LS1 and LS6) LS head bolt torque starts with bolts 1 to 10 and is 22 ft-lb for the first pass, 90° for the second pass, 90° for bolts 1 to 5, 50° for bolts 6 to 10, and 22 ft-lb for bolts 11 to 15., All LS cylinder heads have performance potential, but as with any aspect of engine building, the end goal determines the starting point. Aside from the material, combustion chamber size and port style, the valve size and weight can differ, and the valve angle is different on certain heads, as well as details such as valve cover bolt location.