Info - Service Procedure for Replacement of Resonator and Intermediate Pipe #04-06-05-010 - (Oct 8, 2004)

1998-2000 Saturn S-Series Vehicles

2001 Saturn SC2 Coupe

with 1.9L Dual Overhead Cam (DOHC) Four-Cylinder Engine (VIN 7 - RPO LL0)

Fixed Operations Manager and Technician

Purpose

The original service resonator with intermediate pipe assembly is no longer available for the models listed above. This bulletin contains new service procedures to replace:

1. Intermediate pipe only
2. Both resonator and intermediate pipe

Important

Refer to bulletin 00-T-78 to replace the resonator only.

Service Procedure for Replacing Only the Intermediate Pipe

Removal




Caution

To avoid any vehicle damage, serious personal injury or death when major components are removed from the vehicle and the vehicle is supported by a hoist, support the vehicle with jack stands at the opposite end from which the components are being removed.

Notice

Perform the following steps before beginning any vehicle lifting or jacking procedure:

• Remove or secure all of the vehicle's contents in order to avoid any shifting or any movement that may occur during the vehicle lifting or jacking procedure.
• The lifting or jacking equipment weight rating must meet or exceed the weight of the vehicle and any vehicle contents.
• The lifting or jacking equipment must meet the operational standards of the lifting or jacking equipment's manufacturer.
• Perform the vehicle lifting or jacking procedure on a clean, hard, dry, level surface.
• Perform the vehicle lifting or jacking procedure only at the identified lift points. DO NOT allow the lifting or jacking equipment to contact any other vehicle components.

Failure to perform the previous steps could result in damage to the lifting equipment or the jacking equipment, the vehicle, and/or the vehicle's contents.

1. Raise vehicle squarely on a lift.




2. Measure and mark intermediate pipe at location shown in illustration at a distance of 86 cm (34 in.) behind gasket surface of catalytic converter flange.

Notice

Always use a chain cutter to cut the stainless steel exhaust system pipes. Use of other tools may result in damage to pipes.

Important

The replacement intermediate pipe should be used as a guide to precisely locate the cut location on the pipe section. Hold the replacement pipe to the existing section and mark the cut location BEFORE cutting or removing the old pipe.

3. Using chain cutter tool SA9168NE , or equivalent, cut intermediate pipe at previously marked location.




4. Using chain cutter tool SA9168NE , or equivalent, cut intermediate pipe in front of the rear suspension. Locate center (1) of the approximately 100 mm (4 inch) long straight section, mark the pipe, and make cut.

Important

If muffler is being replaced along with intermediate pipe, the intermediate pipe must be shortened at the outlet end so the muffler inlet can fit over it. Cut the intermediate pipe right behind the up-sized outlet end.

5. Disengage rubber isolator from hanger rod on intermediate pipe and remove pipe.

Installation
1. Position service intermediate pipe under vehicle.
2. Install pipe clamps on both ends of intermediate pipe.
3. Slide intermediate pipe over remaining section of muffler inlet pipe and resonator outlet pipe.
4. Install rubber isolator to hanger rod on intermediate pipe.




5. Refer to illustration and position front pipe clamp 25 mm (1 in) from the end of intermediate pipe facing downward.




6. Locate muffler clamp 25 mm (1 in) (2) from the end of the intermediate pipe and position clamp with U-bolt facing away from fuel tank.




7. Align muffler and intermediate pipe to achieve proper clearances and then tighten clamps.
• Position muffler to ensure 19 mm (3/4 in) of clearance between rear of muffler and muffler ramp (2). If proper clearance cannot be obtained, intermediate pipe must be shortened at resonator joint.
• Muffler hanger block should not contact hanger screw (1). If necessary, loosen muffler mounting strap, shift mounting strap forward to eliminate contact, and retighten. Tighten

  Tighten muffler mounting strap fasteners to 22 N·m (16 ft-lbs).

• Resonator should have at least 15 mm (9/16 in) clearance from heat shields. If necessary, bend heat shields away in any areas with insufficient clearance.
• Tighten exhaust pipe clamp nuts. Tighten

  Tighten exhaust pipe clamp nuts to 41 N·m (30 ft-lbs).

8. Check exhaust system alignment and clearances. Rattle noises will occur if any of the clearances specified in step 7 are insufficient.
9. Start engine and check for exhaust system leaks.

Service Procedure for Replacing Both Resonator and Intermediate Pipe

Important

The DOHC service intermediate pipe will not fit with the service resonator. If both pieces need replacement, use a SOHC intermediate pipe, P/N 21013145, and cut off the front section so it will fit into the resonator outlet.

1. Mark SOHC service intermediate pipe 864 mm (34 in) behind gasket surface of catalytic converter.

Notice

Always use a chain cutter to cut the stainless steel exhaust system pipes. Use of other tools may result in damage to pipes.

2. Using chain cutter tool SA9168NE , or equivalent, cut intermediate pipe at marked location. Discard front section of pipe.

Removal




Caution

To avoid any vehicle damage, serious personal injury or death when major components are removed from the vehicle and the vehicle is supported by a hoist, support the vehicle with jack stands at the opposite end from which the components are being removed.

Notice

Perform the following steps before beginning any vehicle lifting or jacking procedure:

• Remove or secure all of the vehicle's contents in order to avoid any shifting or any movement that may occur during the vehicle lifting or jacking procedure.
• The lifting or jacking equipment weight rating must meet or exceed the weight of the vehicle and any vehicle contents.
• The lifting or jacking equipment must meet the operational standards of the lifting or jacking equipment's manufacturer.
• Perform the vehicle lifting or jacking procedure on a clean, hard, dry, level surface.
• Perform the vehicle lifting or jacking procedure only at the identified lift points. DO NOT allow the lifting or jacking equipment to contact any other vehicle components.

Failure to perform the previous steps could result in damage to the lifting equipment or the jacking equipment, the vehicle, and/or the vehicle's contents.

1. Raise vehicle squarely on a lift.




2. Remove nuts at the outlet of the catalytic converter to intermediate pipe.
3. Remove catalytic converter gasket and discard.





Important

The replacement intermediate pipe should be used as a guide to precisely locate the cut location on the pipe section. Hold the replacement pipe to the existing section and mark the cut location BEFORE cutting or removing the old pipe.

4. Using chain cutter tool SA9168NE , or equivalent, cut intermediate pipe in front of the rear suspension. Locate center (1) of the approximately 100 mm (4 inch) long straight section, mark the pipe, and make cut.

Important

If muffler is being replaced along with intermediate pipe, the intermediate pipe must be shortened at the outlet end so the muffler inlet can fit over it. Cut the intermediate pipe right behind the up-sized outlet end.

5. Disengage rubber isolator from hanger rod on intermediate pipe and remove pipe.

Installation



1. Position service intermediate pipe under vehicle.
2. Slide intermediate pipe over remaining section of muffler inlet pipe.
3. Install rubber isolator to hanger rod on intermediate pipe.
4. Install pipe clamp over outlet end of resonator.
5. Slide outlet end of resonator over front section of intermediate pipe.
6. Install new gasket at outlet end of catalytic converter.
7. Install resonator to catalytic converter outlet flange and install nuts. Flat portion of resonator flange should face downward.
Tighten

Tighten converter flange nuts to 25 N·m (19 ft-lbs).





8. Install pipe clamps at both ends of intermediate pipe.
9. Refer to illustration and position front pipe clamp 25 mm (1 in) from the end of intermediate pipe facing downward.




10. Locate muffler clamp 25 mm (1 in) (2) from the end of the intermediate pipe and position clamp with U-bolt facing away from fuel tank.




11. Align muffler and intermediate pipe to achieve proper clearances and then tighten clamps.
• Position muffler to ensure 19 mm (3/4 in) of clearance between rear of muffler and muffler ramp (2). If proper clearance cannot be obtained, intermediate pipe must be shortened at resonator joint.
• Muffler hanger block should not contact hanger screw (1). If necessary, loosen muffler mounting strap, shift mounting strap forward to eliminate contact, and retighten. Tighten

  Tighten muffler mounting strap fasteners to 22 N·m (16 ft-lbs).

• Resonator should have at least 15 mm (9/16 in) clearance from heat shields. If necessary, bend heat shields away in any areas with insufficient clearance.
• Tighten exhaust pipe clamp nuts. Tighten

  Tighten exhaust pipe clamp nuts to 41 N·m (30 ft-lbs).

12. Check exhaust system alignment and clearances. Rattle noises will occur if any of the clearances specified in step 11 are insufficient.
13. Start engine and check for exhaust system leaks.

Parts Information

Claim Information

To receive credit for this repair during the warranty coverage period, submit a claim through the Saturn Dealer System for L2420 (Intermediate Pipe - Replace).

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer".  They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle.  Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely.  If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition.  See your GM dealer for information on whether your vehicle may benefit from the information.

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