Edelbrock 6879 Instructions
®
© 1997 Edelbrock Corp.
REV. 8/97
TUBULAR EXHAUST SYSTEM
CATALOG #6879/7979
1983-1988 Monte Carlo, L-69 High Output 5.0 L. V8
INSTRUCTIONS
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PLEASE study these instructions carefully before installing your new
Tubular Exhaust System
(TES). If you have any questions or problems, do not hesitate to
contact our Technical Hotline at : 1-800-416-8628.
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TUBULAR EXHAUST SYSTEM: These components are designed as a system to improve the exhaust efficiency of the GM L-69 High Output 5.0 Litre V8 engine. A
performance gain can be expected by the installation of the system. This system requires no welding for installation and retains all O.E.M. emissions equipment.
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SUGGESTED TOOLS FOR INSTALLATION: This vehicle has some metric fasteners.
— 3/8” ratchet socket set with extensions and universal 13mm and 15mm swivel sockets
— Combination set of open-end wrenches
— Jackstands, screwdrivers, pliers, crescent wrench, etc.
— Liquid penetrant, (GM #1052627) anti-seize compound (GM #5613695)
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SPECIAL NOTICE: This Edelbrock part has received an Executive Order number (E.O. #) from the California Air Resources Board (C.A.R.B.) making it legal for
street use on pollution-controlled motor vehicles in all 50 states. To assist you with emissions equipment certification, we have included a silver fan shroud decal
to verify that this part is a legal replacement part on the vehicle for which it is cataloged. The adhesive-backed decal should be affixed to your fan shroud next to
the existing emission and engine specification decal. Do not cover your original equipment specification decal with the Edelbrock fan shroud decal.
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WARNING: The use of “Thermal Wrap” or any aftermarket coating process will void the warranty on your Tubular Exhaust System. Those products can cause
excessive heat and moisture buildup resulting in corrosion and early failure of the system.
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NOTES: The paint used on non-coated T.E.S. is for protection during shipping and storage and will burn off soon after the engine is started. Those who desire a
longer lasting finish should sand blast the T.E.S. to remove the original paint, then apply high temperature header paint, such as VHT, available at most auto parts
stores.
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When cleaning any Edelbrock Pro-Tech coated TES, use only soap and warm water. The use of caustic solvents (Gunk, etc.) will mar or damage the Pro-Tech
coating.
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High temperature spark plug wires and boots are recommended to withstand heat from T.E.S.
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DISASSEMBLY
1. Disconnect negative cable from battery.
2. Raise vehicle and support with jackstands.
3. Use penetrating oil on all nuts and bolts to be removed. This will prevent
the possibility of broken or stripped nuts and bolts.
4. Making sure the converter is cool, remove the catalytic converter.
5. Remove exhaust crossover pipe.
6. Lower vehicle to the ground.
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DISASSEMBLY - LEFT SIDE
1. Remove air cleaner system (note position of line and hose connections).
2. Disconnect A.I.R. (air injection reactor) tube from exhaust manifold.
3. Remove air conditioner compressor rear support bracket (if air conditioning
equipped).
4. Remove power steering pump support bracket (if power steering is applic-
able).
5. Disconnect spark plug wires and remove spark plugs.
6. Remove O2 sensor, being careful not to rupture or destroy the unit.
WARNING: Do not clean this unit in any cleaning solvent and do not rup-
ture wire.
7. Disconnect temperature sensor wire at cylinder head.
8. Remove temperature sensor wire support bracket from valve cover bolt and
lay wire back over engine.
9. Remove bolts and exhaust manifold from top side.
10. To install left side of system from the topside, disconnect steering column
connector and lower slip tube down to steering box. CAUTION: Do not turn
steering wheel or front wheels while this system is disconnected.
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DISASSEMBLY - RIGHT SIDE
1. Disconnect A.I.R. injection tube from exhaust manifold and catalytic convert-
er tube.
2. Disconnect electrical connector and vacuum hoses from A.I.R. diverter valve
assembly (note position of hose and electrical connections).
3. Remove A.I.R. pump feed hose from diverter valve assembly.
4. Remove nut from diverter valve support bracket at exhaust manifold and
loosen alternator pivot bolt, then remove diverter valve assembly.
5. Disconnect spark plug wires and remove spark plugs.
6. Remove dipstick and tube from engine. CAUTION: Do not damage tube.
7. Remove bolts and exhaust manifold from top side.
8. Clean exhaust flange surfaces on cylinder heads at this time.
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ASSEMBLY - LEFT SIDE
1. Install T.E.S. flange gasket and one 3/8"-16 x 1" bolt, lock washer, and flat
washer at rearmost bolt hole (leave bolt loose enough to accept T.E.S.).
2. Install left side T.E.S. manifold from top side.
3. Install all but the front two bolts and washers on left side (do not tighten at
this time).
4. Re-install rear power steering support bracket (do not tighten at this time).
5. Re-install rear A/C support bracket with bolts, lock washers, and spacers
supplied
6. Align all parts and tighten left side bolts and nuts at this time.
7. If disconnected, re-connect steering column coupler. WARNING: Make sure
coupler bolt is tight and check to see that steering wheel is in same orienta-
tion as prior to disassembly.
8. Form brake lines to clear TES pipes.