NHTSA ID Number: 10225246
Manufacturer Communication Number: R28R29
TSB/Document Date: 2022-10-31
Summary
Customer Satisfaction Notification R28/R29 Engine Oil Contamination and Consumption
suitable material.
FUEL PUMP RELAY
1. Use the following steps to release the
fuel pressure.
a. Remove Fuel Pump relay from the
Power Distribution Center (PDC).
For location of relay, refer to label
on underside of PDC cover
(Figure 9).
Figure 9 – Fuel Pump Relay Location
b. Start and run engine until it stalls.
c. Attempt restarting engine until it will no longer run.
d. Turn ignition key to OFF position.
e. Return fuel pump relay to PDC.
f. One or more Diagnostic Trouble Codes (DTC's) may have been stored in
PCM memory due to fuel pump relay removal. Scan tool must be used to
erase a DTC.
2. Open the trunk lid. Disconnect the battery negative cable.
3. Remove the shift knob and shift bezel then cut the tie strap securing the rubber
weather boot.
Customer Satisfaction Notification R28/R29
Engine Oil Contamination and Consumption
Page 14
Service Procedure (Continued)
4. Use the following steps to remove the hood.
a. Disconnect the right and left headlamp electrical connectors from the
headlamp assemblies (Figure 10).
b. Remove the four right and left side headlamp mounting fasteners
(Figure 10).
c. Remove the headlamp assemblies.
d. Release the five wire harness retaining clips from the hood.
e. Mark the position of the nuts to the hinge to aid in installation.
f. Remove the four right and left side nuts attaching the hinges to the hood
(Figure 10).
g. With the aid of an assistant, remove the hood from vehicle.
HEADLAMP MOUNTING FASTENERS
HOOD HINGE NUTS
HEADLAMP ELECTRICAL CONNECTOR
Figure 10 – Headlamp Assembly (Right Side Shown)
Customer Satisfaction Notification R28/R29
Engine Oil Contamination and Consumption
Page 15
Service Procedure (Continued)
5. Use the following steps to remove the air cleaner housing.
a. Disconnect the Make Up Air hose from the air cleaner housing (Figure 11).
b. Disconnect the mass air flow/intake air temperature sensors electrical
connectors (Figure 11).
c. Loosen the clean air hose clamps from the throttle bodies (Figure 11).
d. Remove the air cleaner housing retainers.
e. Remove the air cleaner housing.
THROTTLE BODIES
MAKE UP
AIR HOSE
CLEAN AIR
HOSE
CLAMPS
MASS AIRFLOW / INTAKE
AIR TEMPURATURE
SENSORS
AIR CLEANER HOUSING
Figure 11 – Air Cleaner Housing
Customer Satisfaction Notification R28/R29
Engine Oil Contamination and Consumption
Page 16
Service Procedure (Continued)
6. Use the following steps to drain the engine coolant.
WARNING: Do not remove the radiator pressure cap, cylinder block drain
plugs or loosen the radiator draincock with the cooling system hot and
under pressure. Serious burns from engine coolant can occur.
NOTE: When servicing the cooling system, it is essential that coolant does
not drip onto the accessory drive belt and/or pulleys. Shield the belt with
shop towels before working on the cooling system. If coolant contacts the
belt or pulley, flush both with clean water.
a. Remove the coolant bottle pressure cap.
b. Raise the vehicle on a hoist.
c. Remove the front extension belly pan (Figure 12).
d. Open the radiator draincock located at the lower left side of radiator and
drain the coolant into a suitable pan.
e. Remove the engine block
drain plug(s).
FRONT EXTENTION BELLY PAN
FASTENERS
Figure 12 – Front Extension Belly Pan
Customer Satisfaction Notification R28/R29
Engine Oil Contamination and Consumption
Page 17
Service Procedure (Continued)
7. Remove and save the twenty four under body belly pan bolts and remove the
pan (Figure 13).
8. Lower the vehicle.
BOLTS
INDER BODY
BELLY PAN
Figure 13 - Under Body Belly Pan
Customer Satisfaction Notification R28/R29
Engine Oil Contamination and Consumption
Page 18
Service Procedure (Continued)
9. Discharge the air
conditioning system using
a suitable refrigerant
recovery machine using the
manufacturer’s
instructions.
CROSS SUPPORT
BRACE
10. Remove and save the cross
support brace (Figure 14).
IGNITION COIL COVERS
Figure 14 – Cross Support Brace
11. Remove and save the right
and left side ignition coil
covers (Figure 14).
PURGE SOLENOID
ELECTRICAL
CONNECTOR
12. Disconnect the purge
solenoid electrical
connector, vapor line and
vacuum hose (Figure 15).
VAPOR LINE
Figure 15 – Purge Solenoid
Customer Satisfaction Notification R28/R29
Engine Oil Contamination and Consumption
Page 19
Service Procedure (Continued)
13. Remove and save the
bolt securing the power
steering reservoir and
position the reservoir to
the side (Figure 16).
POWER STREERING RESERVOIR
Figure 16 – Power Steering Reservoir
POWER STEERING
RESERVOIR BRACKET
14. Remove and save the
two bolts securing the
power steering reservoir
bracket and remover the
bracket (Figure 17).
BOLTS
Figure 17 – Power Steering Reservoir Bracket
Customer Satisfaction Notification R28/R29
Engine Oil Contamination and Consumption
Page 20
Service Procedure (Continued)
15. Remove all wire harness and hose retaining clips from the front strut tower
brace.
16. Remove the four front strut tower brace retaining bolts and remove the brace
(Figure 18).
17. Remove the upper radiator hose from the engine (Figure 18).
FRONT STRUT TOWER BRACE
BOLTS
Figure 18 – Front Strut Tower Brace
UPPER RADIATOR HOSE
Customer Satisfaction Notification R28/R29
Engine Oil Contamination and Consumption
Page 21
Service Procedure (Continued)
18. Use the following steps to
remove accessory drive belt.
a.
Release the belt tension by
rotating the accessory drive
belt tensioner
counterclockwise with a 15
mm wrench on the tensioner
pulley bolt. Rotate belt
tensioner until belt can be
removed from pulleys
(Figure 19).
b.
Remove and save the
accessory drive belt.
ACCESSORY DRIVE BELT
TENSIONER PULLEY BOLT
Figure 19 – Accessory Drive Belt
c.
Gently release accessory
drive belt tensioner.
POWER STEERING PUMP PULLEY
19. Remove and save the three
bolts that secure the power
steering pump and remove the
power steering pump. Do not
disconnect lines, position
aside (Figure 20).
ACCESS THE THREE
POWER STEERING
BOLTS THROUGH THE
PULLEY ACCESS
HOLES
Figure 20 – Power Steering Pump
Customer Satisfaction Notification R28/R29
Engine Oil Contamination and Consumption
Page 22
Service Procedure (Continued)
20. Use the following steps to
disconnect and remove the
generator (Figure 21).
ELECTRICAL CONNECTOR
GENERATOR
a. Disconnect the generator
electrical connector
(Figure 21).
b. Disconnect the battery
positive eyelet from the
generator (Figure 21).
c. Remove the two mounting
bolts and remove the
generator (Figure 21).
MOUNTING BOLTS
BATTERY POSITIVE EYELET
Figure 21 - Generator
COOLANT RESERVOIR RETURN HOSE
21. Disconnect the coolant
reservoir return hose from the
engine and position aside
(Figure 22).
22. Disconnect the body side heater
hose from the engine and
position aside (Figure 22).
BODY SIDE HEATER HOSE
Figure 22 – Coolant Reservoir Return Hose
Customer Satisfaction Notification R28/R29
Engine Oil Contamination and Consumption
Page 23
Service Procedure (Continued)
23. Disconnect the two coolant
hoses from the engine oil
cooler and position aside
(Figure 23).
BOLTS
24. Remove and save the three
bolts securing the engine oil
cooler to the oil cooler
mounting bracket and position
the cooler with the oil cooler
lines attached to the engine
(Figure 23).
25. Remove
and
save
the
Powertrain Control Module
(PCM) electrical connector
cover.
COOLANT HOSE LOCATIONS
Figure 23 - Engine Oil Cooler
26. Disconnect
the
three
Powertrain Control Module
(PCM) electrical connectors
(Figure 24).
27. Release the wire harness
retaining clips from the body
and position the PCM
connectors to the engine.
REMOVE THE THREE LEFT MOST
PCM ELECTRICAL CONNECTORS
Figure 24 – PCM Electrical Connectors
Customer Satisfaction Notification R28/R29
Engine Oil Contamination and Consumption
Page 24
Service Procedure (Continued)
28. Remove the ground wire
from the stud at the left side
frame rail (Figure 25).
GROUND WIRE STUD LOCATION
29. Disconnect
the
engine
harness electrical connector
(Figure 25).
ENGINE HARNESS ELECTRICAL CONNECTOR
Figure 25 – Ground Wire
30. Remove and save the foam
block (Figure 26).
FOAM BLOCK
31. Remove and save the Make
Up Air (MUA) hose
(Figure 26).
MAKE UP AIR HOSE
Figure 26 – Foam Block / MUA Hose
Customer Satisfaction Notification R28/R29
Engine Oil Contamination and Consumption
Page 25
Service Procedure (Continued)
32. Disconnect the A/C clutch electrical connector (Figure 27).
33. Remove the bolts that secure the A/C suction line and the A/C discharge line to
the A/C compressor. Plug the holes in A/C compressor and A/C lines to prevent
debris from entering A/C system (Figure 27).
A/C LINES
A/C CLUTCH ELECTRICAL CONNECTOR
Figure 27 – A/C Lines
Customer Satisfaction Notification R28/R29
Engine Oil Contamination and Consumption
Page 26
Service Procedure (Continued)
34. Use the following steps to remove
the windshield wiper arms.
PLASTIC NUT CAPS
a. Lift the wiper arm to its overcenter position to hold the
wiper blade off of the glass
and relieve the spring tension
on the wiper arm to pivot shaft
connection.
b. Carefully pry the plastic nut
cap off of the nut on the pivot
end of the wiper arm
(Figure 28).
Figure 28 – Wiper Arms
c. Remove the nut that secures the wiper arm to the wiper pivot shaft.
CAUTION: The use of a battery terminal puller when removing the
wiper arm is NOT recommended as this may damage the wiper arm.
d. Use a slight rocking action to disengage the wiper arm pivot end from the
pivot shaft and remove the wiper arms
Customer Satisfaction Notification R28/R29
Engine Oil Contamination and Consumption
Page 27
- 6X better wear protection on critical engine parts than...
- 1.3X better sludge protection than industry standards*
- 3X Stronger against viscosity breakdown than leading full...
- Protection for 10,000 miles between oil changes
- Meets or exceeds the following specifications: API SP/SN...
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TSB/Document ID: R28R29
Replacement Service Bulletin Number:
MFR Communication Date: 2022-08-25
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE AND ENGINE COOLING
MFR Component System:
MFR Component Subsystem:
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