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Inside Sealing Chevrolet Generation III Small Block V8 Who For shop owners and technicians What Tips for engine sealing repairs Where Visit www felpro only com for more information Why Leverage the expertise of Federal Mogul s Fel Pro engineering team to grow your engine sealing business Highlights Market opportunities for rebuilders Head gasket selection and installation Surface preparation for MLS technology Valve cover and oil pan sealing Intake manifold gasket selection and fit In 1997 General Motors introduced an engine platform worthy of the legacy established by the venerable first generation small block engine Over the years the Chevrolet brand has utilized three basic small block architectures the original offered from 1955 1995 the LT Series 1992 97 and this month s featured platform the LS introduced in 1997 The idea behind the LS was to create a more powerful efficient and flexible multiple displacements front drive rear drive platform for use in a variety of passenger car and light truck applications Interestingly GM chose the more traditional cam in block pushrod style architecture rather than a single or dual overhead cam setup Simply put the LS Series small block might be the best V8 engine ever produced by GM Initially offered as a 5 7L 346 cubic inch performance engine the LS platform now includes 4 8L 5 3L and 6 0L versions for light trucks These engines also have become favorites among hot rodders due to their positive response to bolt on power adders intakes cylinder heads etc Common Leaks Among the most commonly encountered sealing needs on LS Series engines are 1 head gasket replacement upgrade automotive and or performance 2 valve cover and oil pan sealing and 3 replacement upgrade of stock and or performance intake manifold gaskets Fel Pro Solutions 1 PermaTorqueMLS head gaskets with stopper layer 2 PermaDry valve cover and oil pan gasket sets 3 Intake manifold gaskets featuring proprietary composite material and Printoseal sealing beads Opportunity Abounds in GM s Modern Small Block Chevrolet LS Series Engine Models Engines in Service 5 7L 1997 05 VIN G S 405 820 4 8L 1999 08 VIN C V 1 271 762 5 3L 1999 08 VIN B C J L M P T Z O 3 4 426 484 6 0L 1999 08 VIN H K N U Y 5 1 832 437 FPO EOM 153 www felpro only com 1 GM s Aluminum Marvel By John Gurnig Field Test Technician A good way to judge the business opportunity associated with a modern engine design is to take a look at the books that have been written about it If there are only a few books available from reputable automotive sources your opportunity is probably limited GM s LS Series engine platform has spawned several books from lead ing engine professionals That s not really surprising given the ample opportuni ties to modify these very reliable engines for a wide range of duties In short LS Series engines are true racing thoroughbreds that can also be used with great success and cus tomer satisfaction in an automotive or light truck application We ve seen them in drag racing series such as the NMRA where teams are using nitrous ox ide superchargers turbo chargers and are running on 10 inch tires Another very popular application is in spec engines for circle track competition such as the NASCAR weekly series What s different about the LS Series as compared to GM s Gen I and II plat forms Here are a few highlights Aluminum oil pan stabi lizes lower engine and transmission Block features deep skirt for greater rigidity No distributor Coil near plug ignition system Uses cam and crank position sensors Does not use the tradi tional GM firing order the LS sequence is 1 8 7 2 6 5 4 3 100 lbs lighter than Gen I II engines Key to the success of this engine platform is its ability to make great power with decent fuel economy and excellent overall durability The LS features six bolt main bearing caps four vertical two side drilled which provide a great base in which to make power Head Sealing Tips GM engineers obviously discovered how creative to day s engine builders could be in enhancing the power of LS Series engines This might explain why these engines transitioned in 2002 from conventional composite style head gaskets to multi layer steel gaskets The MLS design is the better choice as it allows you to create signifi cantly more power while preventing the combustion leakage that can occur when the cylinder head lifts away from the block Un like composite style head gaskets MLS gaskets offer recoverability from this lift thereby maintaining contact pressure between the head and block The use of MLS technol ogy requires specialized knowledge related to surface finish and flatness These topics are covered on Page 3 of this issue In terms of general head gasket installation tips I ll keep them simple a Always clean and cham fer the head bolt holes Remember this is an aluminum block pass car applications so you don t want any hidden debris damaging the threads Clean the block threads to remove the sealer from the previous head bolts a Only use high quality fasteners and double check with thread gauges before installing Fel Pro offers the head bolts required for this family of engines a Remove the black oxide coating from the threads as well as the thrust faces of all nuts and washers a Be sure to prep the fasteners with a light coat of engine oil ex cept those fasteners that come with pre applied sealer Be sure to coat all of the threads and the underside of the bolt head a Torque the fasteners in stages following the manufacturer s recom mended procedures a A cold retorque proce dure is recommended a Be sure to calibrate your torque wrenches John Gurnig runs the Fel Pro Field Test Garage in Skokie Ill LS Series Engines Offer Plenty of Opportunity John Gurnig 2 Head Gasket Repairs LS Series engines are now almost universally equipped with multi layer steel head gaskets As a pioneer in MLS technology Federal Mogul s Fel Pro brand is the preeminent source of standard automotive and performance MLS head gaskets for rebuilders across North America Fel Pro PermaTorqueMLS head gaskets for LS Series engines feature four layers of full hard stainless steel encapsulated in a proprietary high temperature coating designed specifically for the repair rebuilding environment In addition these gaskets feature an extra stopper layer that provides a superior primary combustion seal MLS technology is needed in these and a growing number of other engine platforms because of its ability to absorb the vertical head lift caused by the combustion process as well as the horizontal shearing action between the head and block MLS gaskets also can withstand higher operating temperatures than can composite designs Surface Finish Requirements It is crucial to understand that MLS gaskets have different surface finish requirements than composite style gaskets These tighter requirements are offset to some degree by the exclusive aftermarket coating utilized on Fel Pro PermaTorqueMLS gaskets This coating permits engine builders to achieve an ideal seal by ensuring the following surface characteristics Ra Maximum 30 in PermaTorqueMLS is 60 plus Rz Maximum 360 in Mastering the Use of MLS Gaskets Wt Maximum 400 in for waviness with peak spacing between 030 to 100 Waviness peak spacing should be not be less than 030 Fel Pro PermaTorqueMLS Technology Full hard stainless steel layers Embossed beads function as spring to absorb head lift Bead height width and shape controlled to provide precise spring rate Each layer coated with proprietary conformable coating for the aftermarket repair environment from all coolant passages Join the Community of Sealing Professionals Learn about the latest Fel Pro sealing innovations for today s engines Access and download technical service bulletins and newsletters Meet top racing engine builders and learn why they re Fel Pro Only Share your experiences with engine experts across North America www felpro only com 3 MLS Fundamentals Embossed beads function as a spring The height width and shape of the embossed bead determines its spring rate Beads maintain sealing stress during extreme operating conditions MLS gaskets will withstand higher operating temperatures and greater head to block motion than conventional gaskets Other Repairs Fel Pro offers PermaDry mold ed rubber valve cover gaskets that mirror the OE technology on LS Series engines Be sure to install these gaskets dry no adhesives or sealants that s why they carry the PermaDry brand Also it s never a good idea to re use valve cover gaskets so don t cut corners here You could end up having to redo the job later on Oil pan gaskets available for the LS Series also feature PermaDry molded rubber technology which means they should be installed dry Fel Pro also offers its patented oil pan Snap Ups for these engines Ask for Fel Pro p n ES72865 These invalu able tools hold the gasket in place so there s no need for an extra set of hands when installing the pan Fel Pro manufac tures stock replace ment and performance style intake manifold gasket sets for LS engines The stock replacement gasket features a nylon carrier with a molded rubber bead system that seals to each intake port These gaskets also feature hang tabs that position the gasket in relation to the intake manifold The Fel Pro performance intake manifold gaskets feature 1 19 x 3 34 intake ports and are available in five thicknesses to match a variety of intake and cyl inder head combinations They also can be trimmed to match ported cylinder heads In addition some versions feature supple mental Printoseal sealing beads for added contact stress Install em dry intake manifold sealing options Only Fel Pro offers 100 application specific sealing solution components for GM LS Series engines Each Fel Pro gasket and seal for these applications features the best material and design for the aftermarket repair environment GM LS Series Parts Check Exhaust System EGR Valve Gaskets Exhaust Manifold Gasket Sets Exhaust Pipe Gaskets Emissions Fuel Injector O Ring Sets Fuel System Throttle Body Mounting Gaskets Leak Repair Intake Manifold Gasket Sets Oil Pan Gasket Sets Valve Cover Gasket Sets Rear Main Seal Sets Timing Cover Gasket Sets Cooling System Thermostat Gaskets Water Pump Gaskets Engine Repair Conversion Gasket Sets Crankshaft Repair Sleeve Tool Head Bolt Sets Head Gaskets Head Gasket Sets Grommet Sets Long Block Gasket Sets Short Block Gasket Sets Valve Stem Seal Sets Repair Type Repair Type Make sure you get every Fel Pro Inside Sealing e mail newsletter Sign up for FREE monthly e mail alerts at www felpro only com Premium materials available 4 Engine Years Ft Lbs 293 OHV 4 8L Chevrolet Truck 2008 07 VIN C 2nd Design Bolts 1st M11 Bolts 1 10 22 2nd M11 Bolts 1 10 turn 90 degrees 3rd M11 Bolts 1 10 turn 70 degrees 4th M8 Bolts 11 15 22 293 OHV 4 8L Chevrolet Truck 2008 04 VIN V 2nd Design Bolts 1st M11 Bolts 1 10 22 2nd M11 Bolts 1 10 turn 90 degrees 3rd M11 Bolts 1 10 turn 70 degrees 4th M8 Bolts 11 15 22 293 OHV 4 8L Chevrolet Truck 2004 99 VIN V 1st Design Bolts 1st M11 Bolts 1 10 22 2nd M11 Bolts 1 10 turn 90 degrees 3rd M11 Bolts 1 8 turn 90 degrees 4th M11 Bolts 9 10 turn 50 degrees 5th M8 bolts 11 15 22 325 OHV 5 3L Chevrolet 2008 05 VIN C 2nd Design Bolts 1st M11 Bolts 1 10 22 2nd M11 Bolts 1 10 turn 90 degrees 3rd M11 Bolts 1 10 turn 70 degrees 4th M8 Bolts 11 15 22 325 OHV 5 3L Chevrolet Truck 2008 07 VIN J L 0 3 2nd Design Bolts 1st M11 Bolts 1 10 22 2nd M11 Bolts 1 10 turn 90 degrees 3rd M11 Bolts 1 10 turn 70 degrees 4th M8 Bolts 11 15 22 325 OHV 5 3L Chevrolet Truck 2008 04 VIN B M P T Z 2nd Design Bolts 1st M11 Bolts 1 10 22 2nd M11 Bolts 1 10 turn 90 degrees 3rd M11 Bolts 1 10 turn 70 degrees 4th M8 Bolts 11 15 22 325 OHV 5 3L Chevrolet Truck 2004 99 VIN P T Z 1st Design Bolts 1st M11 Bolts 1 10 22 2nd M11 Bolts 1 10 turn 90 degrees 3rd M11 Bolts 1 8 turn 90 degrees 4th M11 Bolts 9 10 turn 50 degrees 5th M8 bolts 11 15 22 346 OHV 5 7L Chevrolet 2005 04 VIN G S 2nd Design Bolts 1st M11 Bolts 1 10 22 2nd M11 Bolts 1 10 turn 90 degrees 3rd M11 Bolts 1 10 turn 70 degrees 4th M8 Bolts 11 15 22 346 OHV 5 7L Chevrolet 2004 97 VIN G S 1st Design Bolts 1st M11 Bolts 1 10 22 2nd M11 Bolts 1 10 turn 90 degrees 3rd M11 Bolts 1 8 turn 90 degrees 4th M11 Bolts 9 10 turn 50 degrees 5th M8 Bolts 11 15 22 364 OHV 6 0L Chevrolet 2008 VIN Y 2nd Design Bolts 1st M11 Bolts 1 10 22 2nd M11 Bolts 1 10 turn 90 degrees 3rd M11 Bolts 1 10 turn 70 degrees 4th M8 Bolts 11 15 22 364 OHV 6 0L Chevrolet 2007 05 VIN H U 2nd Design Bolts 1st M11 Bolts 1 10 22 2nd M11 Bolts 1 10 turn 90 degrees 3rd M11 Bolts 1 10 turn 70 degrees 4th M8 Bolts 11 15 22 364 OHV 6 0L Chevrolet Truck 2008 07 VIN K Y 5 2nd Design Bolts 1st M11 Bolts 1 10 22 2nd M11 Bolts 1 10 turn 90 degrees 3rd M11 Bolts 1 10 turn 70 degrees 4th M8 Bolts 11 15 22 364 OHV 6 0L Chevrolet Truck 2008 04 VIN H N U 2nd Design Bolts 1st M11 Bolts 1 10 22 2nd M11 Bolts 1 10 turn 90 degrees 3rd M11 Bolts 1 10 turn 70 degrees 4th M8 Bolts 11 15 22 364 OHV 6 0L Chevrolet Truck 2004 99 VIN N U 1st Design Bolts 1st M11 Bolts 1 10 22 2nd M11 Bolts 1 10 turn 90 degrees 3rd M11 Bolts 1 8 turn 90 degrees 4th M11 Bolts 9 10 turn 50 degrees 5th M8 bolts 11 15 22 378 OHV 6 2L Chevrolet 2008 VIN W 2nd Design Bolts 1st M11 Bolts 1 10 22 2nd M11 Bolts 1 10 turn 90 degrees 3rd M11 Bolts 1 10 turn 70 degrees 4th M8 Bolts 11 15 22 378 OHV 6 2L Chevrolet Truck 2008 07 VIN 8 2nd Design Bolts 1st M11 Bolts 1 10 22 2nd M11 Bolts 1 10 turn 90 degrees 3rd M11 Bolts 1 10 turn 70 degrees 4th M8 Bolts 11 15 22 427 OHV 7 0L Chevrolet 2008 06 VIN E 2nd Design Bolts 1st M11 Bolts 1 10 22 2nd M11 Bolts 1 10 turn 90 degrees 3rd M11 Bolts 1 10 turn 70 degrees 4th M8 Bolts 11 15 22 Chevrolet LS Series Torque Specifications 5
