Buick Enclave: Specifications, Diagnostic Information and Procedures
SPECIFICATIONS
FASTENER TIGHTENING SPECIFICATIONS
Fastener Tightening Specifications
DIAGNOSTIC INFORMATION AND PROCEDURES
SYMPTOMS - ENGINE EXHAUST
- Review the exhaust system description in order to familiarize yourself
with the exhaust system
components and the intended function of the components. Refer to Exhaust
System Description.
- All diagnostics on a vehicle should follow a logical process. Strategy
Based Diagnostics is a uniform
approach for repairing all systems. The diagnostic flow is the place to
start when repairs are necessary
and may always be used in order to resolve a system problem. For a detailed
explanation, refer to
Strategy Based Diagnosis.
Visual/Physical Inspection
- Inspect for aftermarket or non-OEM devices such as, but not limited to;
tailpipe extensions, headers and
exhaust cutouts. Any aftermarket exhaust system devices could affect the
operation and proper
performance of the exhaust system.
- Verify the exact operating conditions under which the concern exists.
Note factors such as engine RPM,
engine temperature, engine load and frequency of concern.
- Inspect the easily accessible or visible system components for obvious
damage or conditions which could
cause any symptom.
Intermittent
Test the vehicle under the same conditions that the customer reported in
order to verify the system is operating
as designed.
Symptom List
Refer to a symptom diagnostic procedure from the following list in order to
diagnose the symptom:
- Loss of power
- Poor acceleration
- Poor fuel economy
- Excessive smoke diesel
- Exhaust hissing noise
- Exhaust popping noise
- Exhaust rattle noise
- Loud exhaust noise
- Exhaust buzz, groan, hum noise
RESTRICTED EXHAUST
Special Tools
- J-35314-A Exhaust Back Pressure Gauge
Diagnostic Aids
WARNING: Refer to Hot Exhaust System Warning.
For dual exhaust systems a quick check of exhaust flow will help determine
which side of the exhaust system is
restricted. The side that has less exhaust flow is the side that will be suspect
and diagnosis should begin there.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
4
The exhaust system has very low back pressure under normal conditions. If the
exhaust system is
restricted, a significant increase in the exhaust pressure is noticed on the
J-35314-A gauge.
Removing the HO2S sensor may set a DTC. When finishing this diagnostic table, be
sure to clear all
codes.
5
This step will isolate the catalytic converter from the remainder of the
exhaust system.
8
Confirming that the condition has been fixed is essential. If the symptom
still exists and the vehicle has a
dual exhaust system, proceed to step 2 and repeat diagnostic procedure on the
opposite exhaust pipe.
Restricted Exhaust
EXHAUST LEAKAGE
Exhaust Leakage
EXHAUST NOISE
Exhaust Noise
READ NEXT:
EXHAUST MANIFOLD REPLACEMENT - LEFT SIDE
Removal Procedure
WARNING: Refer to Exhaust Service Warning.
WARNING: Refer to Protective Goggles and Glove Warning.
1. Remove the exhaust manifold heat shield
EXHAUST SYSTEM DESCRIPTION
IMPORTANT: Use of non-OEM parts may cause driveability concerns.
The exhaust system carries exhaust gases, treated by the catalytic converter,
through a resonator, if appli
SEE MORE:
Manual Liftgate Operation
WARNING
Exhaust gases can enter the vehicle if it is driven with the liftgate or trunk/hatch
open, or with any objects that pass through the seal between the body and the trunk/hatch
or liftgate. Engine exhaust contains carbon monoxide (CO) which cannot be seen or
s
FRONT DISC BRAKE PADS REPLACEMENT
Fig. 12: View Of Front Disc Brake Pads
Front Disc Brake Pads Replacement
REAR DISC BRAKE PADS REPLACEMENT
Fig. 13: Identifying Rear Disc Brake Pads
Rear Disc Brake Pads Replacement
BRAKE PAD AND ROTOR BURNISHING
WARNING: Road test a vehicle under safe cond