Edelbrock 68752 User Manual

Catalog #68752, 68753
©2006 Edelbrock Corporation

Page 1 of 3

Brochure #63-68752

Rev. 6/06 - DA/mc

TUBULAR EXHAUST SYSTEM

For 1988-1992 Camaro & Firebird, 5.0L V8 T.B.I.,

Auto & Standard Transmission, with A.I.R.

Catalog #68752, #68753

INSTALLATION INSTRUCTIONS

Please study these instructions carefully before installing your new

Tubular Exhaust System

(TES). If you have any questions, please contact our

Technical Hotline at : 1-800-416-8628 from 7 am - 5pm, Monday-Friday, Pacific Standard Time or e-mail us at [e-mail]

.

TUBULAR EXHAUST SYSTEM: These components are designed as a system to improve the exhaust efficiency of the GM T.B.I. (Throttle Body
Injection) 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.

Suggested Tools Needed for Installation: This vehicle has 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)

SPECIAL NOTICE: This Edelbrock Tubular Exhaust System has received an Executive Order number (E.O.#) from the California Air Resources Board
(C.A.R.B.) making it legal for street use in all 50 states. To assist you with emission equipment certification, we have included a silver fan shroud
decal to help testing personnel verify the this part is a legal replacement on the vehicle for which it is cataloged. The adhesive-backed decal should
be affixed next to the existing emission and engine specifications decal. Do not cover any part of your original emission decal.

WARNING: The use of "Thermal Wrap" or any aftermarket coating process will void the warranty

on your Edelbrock Tubular Exhaust Systems.

Those products can cause excessive heat and moisture buildup resulting in corrosion and failure of the system.

NOTE: High temperature spark plug wires and boots are recommended to withstand heat from T.E.S.

IMPORTANT NOTE:

Proper installation is the responsibility of the installer. Improper installation will void warranty and may result in poor

performance and engine or vehicle damage.

KIT CONTENTS

Catalog #68752 (Ceramic-Coated), #68753 (Ti-Tech Coated)

Qty. Description

❑ 1 Header left side #25-9331 (#68752)

❑ 1 Header right side #25-9332 (#68752)

❑ 1 Header left side #25-9003 (#68753)
❑ 1 Header right side #25-9004 (#68753)

❑ 1 Extension pipe right side #25-9503
❑ 1 Extension pipe left side #25-9504
❑ 1 Umpco clamp; 3/8” I.D.
❑ 1 Umpco clamp; 1-5/8” I.D.
❑ 1 Hex nut; 10-32
❑ 1 Hex capscrew; 10-32 x 1”
❑ 1 Star washer; 3/16” internal
❑ 1 Tube spacer; 5/8” x .724” long
❑ 2 Tube spacer; 5/8” x 1.530” long
❑ 1 Tube spacer; 5/8” x .375” long
❑ 1 Donut gaskets; 2-1/4”
❑ 1 Adapter #79-9553
❑ 1 Adapter gasket

Qty. Description

❑ 1 Flange connector
❑ 1 U-Muffler clamp; 2-1/4”
❑ 1 O2 Sensor pigtail wire; 12”
❑ 1 Coolant tube bracket
❑ 2 Chevy V8 port gaskets
❑ 1 Hex bolts; 3/8” - 16 x 1-1/2”
❑ 2 Hex bolts; 3/8” - 16 x 2”
❑ 2 Hex bolts; 3/8” - 16 x 3”
❑ 12 Hex header bolts; 3/8” x 1”
❑ 16 Lock washers; 3/8”
❑ 1 Hose (A.I.R.); 5/8” x 10”
❑ 4 Flat washers; 3/8”
❑ 1 Hose connector; 5/8”
❑ 2 Ferry bolts; 3/8” x 2-3/4”
❑ 3 Spark plug connector boots
❑ 3 Spark plug terminal ends

Catalog #68752, 68753
©2006 Edelbrock Corporation

Page 2 of 3

Brochure #63-68752

Rev. 6/06 - DA/mc

• 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 exhaust
crossover pipe.

5. Lower vehicle to the ground.

• 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 applicable).

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 rupture 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. 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. USE

EXTREME CAUTION IF VEHICLE IS EQUIPPED WITH AIR
BAG!

• DISASSEMBLY - RIGHT SIDE

1. Disconnect A.I.R. injection tube from exhaust manifold and
catalytic converter 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 air conditioner compressor rear support bracket. If A/C
compressor is mounted on right side of engine, this bracket will
require bending in a vise before re-installation

(See Figure 1).

INSTALLATION INSTRUCTIONS

8. Remove bolts and exhaust manifold from top side.

9. Clean exhaust flange surfaces on cylinder heads at this time.

10. Unbolt oil coolant tube from frame rail and bend brace around
tube. Bolt new flat brace (supplied) to frame rail. This will
move coolant tube above and on top of frame which will allow
more clearance for exhaust system.

• 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 three 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

(See Figure 2 for spacer locations).

6. Align all parts and tighten left side bolts and nuts at this time.

7. Re-connect steering column coupler. WARNING: Make sure
coupler bolt is tight and check to see that steering wheel is in
same orientation as prior to disassembly.

8. Form brake lines to clear TES pipes.

9. Re-install spark plugs and re-connect wires on left side.

10. Change spark plug wire ends and boots as needed.

11. Re-install temperature sensor wire support bracket and re­connect wire to temperature sensor.

12. Re-install O2 sensor. Use anti-seize on threads of sensor and
torque to 30 ft./lbs. Re-route O2 sensor wire from wire loom to
O2 sensor making sure all wires are clear of exhaust system
(O2 sensor extension wire is included in kit).

• ASSEMBLY - RIGHT 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 right side T.E.S. manifold and dipstick tube from top side.

3. Install remaining bolts, lock washers, and dipstick tube clamps

(See Figure 3).

Do not tighten bolts at this time.

4. Re-install O.E.M. front stud bolt with spacer (supplied). Align all
parts and tighten all right side bolts at this time.

5. Re-install spark plugs and re-connect wires.

6. Change spark plug wire ends and boots as needed.

7. Re-install diverter valve assembly in front O.E.M. stud bolt and
tighten.

8. Re-connect electrical connections and vacuum lines to diverter
valve assembly.

9. Remove A.I.R. check valves from original manifolds and re­install them on T.E.S. For 1986 & 1987 models, use plastic
connector and 5" hose supplied. Re-connect air hoses. For
1988 models remove 1/2" from formed rubber O.E.M. elbow
and install plastic connector. Use 2" of hose supplied and re­connect air hose. Re-connect all A.I.R. injection hoses at this
time.

10. Raise vehicle and support with jackstands.

Fig. 1