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1989 Peterbilt 378

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Displaying 1 to 17 (of 17 products)
On Sale:

$38.73

Avail:
2 in Stock
Warehouse: US-7
Qty:
EnginePer VehicleFit NotesFitment Notes
1989 Peterbilt 378 equipped with
14.6L L6 Diesel Turbo,
10.3L 6 Diesel
 
1
 
Heavy-Duty Thermostat
160 Degree
Seal included
 
1989 Peterbilt 378 equipped with
14.6L L6 Diesel Turbo,
10.3L 6 Diesel Heavy-Duty Thermostat
160 Degree
Seal included

1 Per Vehicle
1989 Peterbilt 378 equipped with
10L L6 Diesel Turbo
 
1
 
Heavy-Duty Thermostat
W/O Low Flow Cool.
160 Degree
Seal included
 
1989 Peterbilt 378 equipped with
10L L6 Diesel Turbo Heavy-Duty Thermostat
W/O Low Flow Cool.
160 Degree
Seal included

1 Per Vehicle
On Sale:

$39.07

Avail:
2 in Stock
Warehouse: US-7
Qty:
EnginePer VehicleFit NotesFitment Notes
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
 
2
 
Heavy-Duty Thermostat
190 Degree
Seal included
 
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled Heavy-Duty Thermostat
190 Degree
Seal included

2 Per Vehicle
On Sale:

$24.43

Avail:
1 in Stock
Warehouse: US-7
Qty:
EnginePer VehicleFit NotesFitment Notes
1989 Peterbilt 378 equipped with
10L L6 Diesel Turbo
 
2
 
Heavy Duty Thermostat
Temperature 175F
OE Specified Temperature 175 Degrees
with Low Flow Cooing
 
1989 Peterbilt 378 equipped with
10L L6 Diesel Turbo Heavy Duty Thermostat
Temperature 175F
OE Specified Temperature 175 Degrees
with Low Flow Cooing

2 Per Vehicle
On Sale:

$27.72

Avail:
1 in Stock
Warehouse: US-7
Qty:
EnginePer VehicleFit NotesFitment Notes
1989 Peterbilt 378 equipped with
10.0L L6 Diesel Turbo
 
2
 
Heavy-Duty Thermostat
Temperature 170 Degrees
W/Low Flow Cool.
 
1989 Peterbilt 378 equipped with
10.0L L6 Diesel Turbo Heavy-Duty Thermostat
Temperature 170 Degrees
W/Low Flow Cool.

2 Per Vehicle
Avail:
0 in Stock
 OUT OF STOCK
EnginePer VehicleFit NotesFitment Notes
1989 Peterbilt 378 equipped with
10L L6 Diesel Turbo
 
2
 
Heavy-Duty Thermostat
W/Low Flow Cool.
170 Degree
 
1989 Peterbilt 378 equipped with
10L L6 Diesel Turbo Heavy-Duty Thermostat
W/Low Flow Cool.
170 Degree

2 Per Vehicle
Avail:
0 in Stock
 OUT OF STOCK
EnginePer VehicleFit NotesFitment Notes
1989 Peterbilt 378 equipped with
14.6L L6 Diesel Turbo,
12.7L L6 Diesel Turbo/Aftercooled,
10.3L 6 Diesel
 
1
 
Heavy Duty Thermostat
Temperature 190F
Includes seal
OE Specified Temperature 190 Degrees
 
1989 Peterbilt 378 equipped with
14.6L L6 Diesel Turbo,
12.7L L6 Diesel Turbo/Aftercooled,
10.3L 6 Diesel Heavy Duty Thermostat
Temperature 190F
Includes seal
OE Specified Temperature 190 Degrees

1 Per Vehicle
1989 Peterbilt 378 equipped with
10.0L L6 Diesel Turbo
 
1
 
Heavy Duty Thermostat
Temperature 190F
Includes seal
without Low Flow Cooling
For Engine Coolant
OE Specified Temperature 190 Degrees
 
1989 Peterbilt 378 equipped with
10.0L L6 Diesel Turbo Heavy Duty Thermostat
Temperature 190F
Includes seal
without Low Flow Cooling
For Engine Coolant
OE Specified Temperature 190 Degrees

1 Per Vehicle
On Sale:

$24.54

Avail:
1 in Stock
Warehouse: US-7
Qty:
EnginePer VehicleFit NotesFitment Notes
1989 Peterbilt 378 equipped with
14L L6 Diesel Turbo,
10L L6 Diesel Turbo
 
1
 
Heavy Duty Thermostat
Temperature 225F
For Engine Oil Cooler System
OE Specified Temperature 225 Degrees
 
1989 Peterbilt 378 equipped with
14L L6 Diesel Turbo,
10L L6 Diesel Turbo Heavy Duty Thermostat
Temperature 225F
For Engine Oil Cooler System
OE Specified Temperature 225 Degrees

1 Per Vehicle
On Sale:

$20.86

Avail:
2 in Stock
Warehouse: US-4
Qty:
EnginePer VehicleFit NotesFitment Notes
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
 
1
 
Heavy Duty Thermostat
Temperature 160F
Includes seal
Alternate Temperature Option
 
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled Heavy Duty Thermostat
Temperature 160F
Includes seal
Alternate Temperature Option

1 Per Vehicle
1989 Peterbilt 378 equipped with
10.3L 6 Diesel
 
1
 
Heavy Duty Thermostat
Temperature 160F
Includes seal
OE Specified Temperature 160 Degrees
 
1989 Peterbilt 378 equipped with
10.3L 6 Diesel Heavy Duty Thermostat
Temperature 160F
Includes seal
OE Specified Temperature 160 Degrees

1 Per Vehicle
1989 Peterbilt 378 equipped with
10L L6 Diesel Turbo
 
1
 
Heavy Duty Thermostat
Temperature 160F
Includes seal
For Engine Coolant System
OE Specified Temperature 160 Degrees
 
1989 Peterbilt 378 equipped with
10L L6 Diesel Turbo Heavy Duty Thermostat
Temperature 160F
Includes seal
For Engine Coolant System
OE Specified Temperature 160 Degrees

1 Per Vehicle
On Sale:

$16.95

Avail:
94 in Stock
Warehouse: US-4
Qty:
EnginePer VehicleFit NotesFitment Notes
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
 
1
 
Heavy Duty Thermostat
Temperature 170F
Includes seal
Alternate Temperature Option
 
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled Heavy Duty Thermostat
Temperature 170F
Includes seal
Alternate Temperature Option

1 Per Vehicle
1989 Peterbilt 378 equipped with
10.3L 6 Diesel
 
1
 
Heavy Duty Thermostat
Temperature 170F
Includes seal
OE Specified Temperature 170 Degrees
 
1989 Peterbilt 378 equipped with
10.3L 6 Diesel Heavy Duty Thermostat
Temperature 170F
Includes seal
OE Specified Temperature 170 Degrees

1 Per Vehicle
1989 Peterbilt 378 equipped with
10L L6 Diesel Turbo
 
1
 
Heavy Duty Thermostat
Temperature 170F
Includes seal
For Engine Coolant System
OE Specified Temperature 170 Degrees
 
1989 Peterbilt 378 equipped with
10L L6 Diesel Turbo Heavy Duty Thermostat
Temperature 170F
Includes seal
For Engine Coolant System
OE Specified Temperature 170 Degrees

1 Per Vehicle
On Sale:

$20.86

Avail:
4 in Stock
Warehouse: US-4
Qty:
EnginePer VehicleFit NotesFitment Notes
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
 
1
 
Heavy Duty Thermostat
Temperature 180F
Includes seal
OE Specified Temperature
 
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled Heavy Duty Thermostat
Temperature 180F
Includes seal
OE Specified Temperature

1 Per Vehicle
1989 Peterbilt 378 equipped with
10.3L 6 Diesel
 
1
 
Heavy Duty Thermostat
Temperature 180F
Includes seal
OE Specified Temperature 180 Degrees
 
1989 Peterbilt 378 equipped with
10.3L 6 Diesel Heavy Duty Thermostat
Temperature 180F
Includes seal
OE Specified Temperature 180 Degrees

1 Per Vehicle
1989 Peterbilt 378 equipped with
10L L6 Diesel Turbo
 
1
 
Heavy Duty Thermostat
Temperature 180F
Includes seal
For Engine Coolant System
OE Specified Temperature 180 Degrees
 
1989 Peterbilt 378 equipped with
10L L6 Diesel Turbo Heavy Duty Thermostat
Temperature 180F
Includes seal
For Engine Coolant System
OE Specified Temperature 180 Degrees

1 Per Vehicle
On Sale:

$21.00

Avail:
21 in Stock
Warehouse: US-4
Qty:
EnginePer VehicleFit NotesFitment Notes
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
 
1
 
Heavy Duty Thermostat
Temperature 190F
Includes seal
Higher Alternate Temperature Replacement
 
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled Heavy Duty Thermostat
Temperature 190F
Includes seal
Higher Alternate Temperature Replacement

1 Per Vehicle
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled,
10.3L 6 Diesel
 
1
 
Heavy Duty Thermostat
Temperature 190F
Includes seal
OE Specified Temperature 190 Degrees
 
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled,
10.3L 6 Diesel Heavy Duty Thermostat
Temperature 190F
Includes seal
OE Specified Temperature 190 Degrees

1 Per Vehicle
1989 Peterbilt 378 equipped with
10L L6 Diesel Turbo
 
1
 
Heavy Duty Thermostat
Temperature 190F
Includes seal
without Low Flow Cooling
For Engine Coolant
OE Specified Temperature 190 Degrees
 
1989 Peterbilt 378 equipped with
10L L6 Diesel Turbo Heavy Duty Thermostat
Temperature 190F
Includes seal
without Low Flow Cooling
For Engine Coolant
OE Specified Temperature 190 Degrees

1 Per Vehicle
Avail:
0 in Stock
 OUT OF STOCK
EnginePer VehicleFit NotesFitment Notes
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled
 
2
 
Heavy-Duty Thermostat
Temperature 190 Degrees
Seal Included Seal Included
Part Replacement Replaces 15229
 
1989 Peterbilt 378 equipped with
12.7L L6 Diesel Turbo/Aftercooled Heavy-Duty Thermostat
Temperature 190 Degrees
Seal Included Seal Included
Part Replacement Replaces 15229

2 Per Vehicle
Avail:
0 in Stock
 OUT OF STOCK
EnginePer VehicleFit NotesFitment Notes
1989 Peterbilt 378 equipped with
14.6L L6 Diesel Turbo,
10.3L 6 Diesel
 
1
 
Heavy-Duty Thermostat
Temperature 160 Degrees
Seal Included Seal Included
 
1989 Peterbilt 378 equipped with
14.6L L6 Diesel Turbo,
10.3L 6 Diesel Heavy-Duty Thermostat
Temperature 160 Degrees
Seal Included Seal Included

1 Per Vehicle
1989 Peterbilt 378 equipped with
10.0L L6 Diesel Turbo
 
1
 
Heavy-Duty Thermostat
Temperature 160 Degrees
Seal Included Seal Included
W/O Low Flow Cool.
 
1989 Peterbilt 378 equipped with
10.0L L6 Diesel Turbo Heavy-Duty Thermostat
Temperature 160 Degrees
Seal Included Seal Included
W/O Low Flow Cool.

1 Per Vehicle
Avail:
0 in Stock
 OUT OF STOCK
EnginePer VehicleFit NotesFitment Notes
1989 Peterbilt 378 equipped with
14.6L L6 Diesel Turbo,
10.3L 6 Diesel
 
1
 
Heavy-Duty Thermostat
Temperature 170 Degrees
Seal Included Seal Included
 
1989 Peterbilt 378 equipped with
14.6L L6 Diesel Turbo,
10.3L 6 Diesel Heavy-Duty Thermostat
Temperature 170 Degrees
Seal Included Seal Included

1 Per Vehicle
1989 Peterbilt 378 equipped with
10.0L L6 Diesel Turbo
 
1
 
Heavy-Duty Thermostat
Temperature 170 Degrees
Seal Included Seal Included
W/O Low Flow Cool.
 
1989 Peterbilt 378 equipped with
10.0L L6 Diesel Turbo Heavy-Duty Thermostat
Temperature 170 Degrees
Seal Included Seal Included
W/O Low Flow Cool.

1 Per Vehicle
Avail:
0 in Stock
 OUT OF STOCK
EnginePer VehicleFit NotesFitment Notes
1989 Peterbilt 378 equipped with
14.6L L6 Diesel Turbo,
10.3L 6 Diesel
 
1
 
Heavy-Duty Thermostat
Temperature 180 Degrees
Seal Included Seal Included
 
1989 Peterbilt 378 equipped with
14.6L L6 Diesel Turbo,
10.3L 6 Diesel Heavy-Duty Thermostat
Temperature 180 Degrees
Seal Included Seal Included

1 Per Vehicle
1989 Peterbilt 378 equipped with
10.0L L6 Diesel Turbo
 
1
 
Heavy-Duty Thermostat
Temperature 180 Degrees
Seal Included Seal Included
W/O Low Flow Cool.
 
1989 Peterbilt 378 equipped with
10.0L L6 Diesel Turbo Heavy-Duty Thermostat
Temperature 180 Degrees
Seal Included Seal Included
W/O Low Flow Cool.

1 Per Vehicle
Avail:
0 in Stock
 OUT OF STOCK
EnginePer VehicleFit NotesFitment Notes
1989 Peterbilt 378 equipped with
14.6L L6 Diesel Turbo,
10.3L 6 Diesel
 
1
 
Heavy-Duty Thermostat
Temperature 190 Degrees
Seal Included Seal Included
 
1989 Peterbilt 378 equipped with
14.6L L6 Diesel Turbo,
10.3L 6 Diesel Heavy-Duty Thermostat
Temperature 190 Degrees
Seal Included Seal Included

1 Per Vehicle
1989 Peterbilt 378 equipped with
10.0L L6 Diesel Turbo
 
1
 
Heavy-Duty Thermostat
Temperature 190 Degrees
Seal Included Seal Included
W/O Low Flow Cool.
 
1989 Peterbilt 378 equipped with
10.0L L6 Diesel Turbo Heavy-Duty Thermostat
Temperature 190 Degrees
Seal Included Seal Included
W/O Low Flow Cool.

1 Per Vehicle
Avail:
0 in Stock
 OUT OF STOCK
EnginePer VehicleFit NotesFitment Notes
1989 Peterbilt 378 equipped with
10.5L 6 Diesel
 
1
 
Heavy-Duty Thermostat
Temperature 175 Degrees
 
1989 Peterbilt 378 equipped with
10.5L 6 Diesel Heavy-Duty Thermostat
Temperature 175 Degrees

1 Per Vehicle
Displaying 1 to 17 (of 17 products)