106+ 1978 Dodge Diplomat Cooling System Medallion Parts - Page 4

Medallion · Cooling System (106 products)

Exact-fit parts for the 1978 Dodge Diplomat Medallion.

Motorad

Part # 2000-195

Fits with Conditions

High Flow Thermostat-195 Degrees

$8.75

GPD

Part # 2811236

Fits with Conditions

gpd Electric Cooling Fan 2811236

$60.10

Gates

Part # 20945

Confirmed Fit

Gates 76-78 Plymouth Volare 6-Cyl. 225 Upper Molded Coolant Hose

$25.75

Molded Heater Hose 20R3EC Class D1 and D2

ContiTech

Part # 63735

Fits with Conditions

Molded Heater Hose 20R3EC Class D1 and D2

$12.04

Dayco

Part # DP861

Fits with Conditions

WATER PUMP-AUTO/LIGHT TRUCK, DAYCO

$48.33

Motorad

Part # 200-195

Fits with Conditions

Thermostat-195 Degrees

$9.71

GMB

Part # 120-1070P

Confirmed Fit

Engine Water Pump

$82.34

Motorad

Part # CH4830

Fits with Conditions

Engine Coolant Water Outlet

$12.28

Designed to transfer glycol-based coolant throughout the vehicle's cooling system. The EPDM tube and cover and the synthetic reinforcement meets or exceeds SAE 20R4EC Class D1 specifications. Exact OEM configuration ensures a perfect fit.

ContiTech

Part # 60928

Fits with Conditions

Designed to transfer glycol-based coolant throughout the vehicle's cooling system. The EPDM tube and cover and the synthetic reinforcement meets or exceeds SAE 20R4EC Class D1 specifications. Exact OEM configuration ensures a perfect fit.

$27.77

Dayco

Part # 70463

Fits with Conditions

CURVED RADIATOR HOSE, DAYCO

$21.05

Motorad

Part # T16V

Fits with Conditions

Standard Steel Radiator Cap

$13.71

Dayco

Part # 81151

Fits with Conditions

FLEX RADIATOR HOSE, STANDARD, DAYCO

$17.76

Standard Rotation Thermal Heavy Duty Fan Clutch

Four Seasons

Part # 36956

Fits with Conditions

Standard Rotation Thermal Heavy Duty Fan Clutch

$57.91

Gates

Part # 25806

Confirmed Fit

Gates 67-69 Chevrolet Camaro V-8 350 Upper Flexible Coolant Hose (Standard)

$47.55

Dayco

Part # 81491

Fits with Conditions

FLEX RADIATOR HOSE, STANDARD, DAYCO

$22.91

Gates

Part # 20874

Confirmed Fit

Gates 72-79 Dodge D & W Series Pickup V-8 318 Upper Molded Coolant Hose

$32.21

Motorad

Part # 200-205

Fits with Conditions

Thermostat-205 Degrees

$13.71

Standard Rotation Non-Thermal Fan Clutch

Four Seasons

Part # 36787

Fits with Conditions

Standard Rotation Non-Thermal Fan Clutch

$28.28

Edelbrock

Part # 8607

Confirmed Fit

Edelbrock Thermostat High Flow 063mm 180-Deg

$26.95

Vernet

Part # TH1378.83

Fits with Conditions

Engine Coolant Thermostat

$8.33

Frequently Asked Questions

Do these parts fit my 1978 Dodge Diplomat Medallion?

This page groups parts listed for the 1978 Dodge Diplomat Medallion. Some products fit every trim, while others depend on submodel, engine, drivetrain, or brake package. Use your trim in My Garage or the product page fitment check to confirm exact fit.

What cooling system options are available for my 1978 Dodge Diplomat Medallion?

We offer a wide selection of cooling system parts for the 1978 Dodge Diplomat Medallion. This page narrows the catalog to the year, make, and model; use your trim on product pages to confirm exact fit when a part only fits certain submodels.

What brands make parts for the 1978 Dodge Diplomat Medallion?

We carry parts from trusted brands including Motorad, Gates, Dayco, Vernet, and Four Seasons, plus many more. Filter by brand to find your preferred manufacturer.

How fast do 1978 Dodge Diplomat Medallion parts ship?

Most in-stock items ship within 1-2 business days. Shipping rates are calculated at checkout based on your location.

What warranty do your 1978 Dodge Diplomat Medallion parts come with?

Warranty coverage varies by manufacturer but typically ranges from 1 year to lifetime. Each product page includes specific warranty information from the manufacturer.

1978 Dodge Diplomat(1,717 parts)

1978 Dodge Diplomat(1,717 parts)

Shop by Problem

Other Dodge Diplomat Years

Medallion · Cooling System (106 products)

High Flow Thermostat-195 Degrees

gpd Electric Cooling Fan 2811236

Gates 76-78 Plymouth Volare 6-Cyl. 225 Upper Molded Coolant Hose

Molded Heater Hose 20R3EC Class D1 and D2

WATER PUMP-AUTO/LIGHT TRUCK, DAYCO

Thermostat-195 Degrees

Engine Water Pump

Engine Coolant Water Outlet

Designed to transfer glycol-based coolant throughout the vehicle's cooling system. The EPDM tube and cover and the synthetic reinforcement meets or exceeds SAE 20R4EC Class D1 specifications. Exact OEM configuration ensures a perfect fit.

CURVED RADIATOR HOSE, DAYCO

Standard Steel Radiator Cap

FLEX RADIATOR HOSE, STANDARD, DAYCO

Standard Rotation Thermal Heavy Duty Fan Clutch

Gates 67-69 Chevrolet Camaro V-8 350 Upper Flexible Coolant Hose (Standard)

FLEX RADIATOR HOSE, STANDARD, DAYCO

Gates 72-79 Dodge D & W Series Pickup V-8 318 Upper Molded Coolant Hose

Thermostat-205 Degrees

Standard Rotation Non-Thermal Fan Clutch

Edelbrock Thermostat High Flow 063mm 180-Deg

Engine Coolant Thermostat

Frequently Asked Questions

Do these parts fit my 1978 Dodge Diplomat Medallion?

What cooling system options are available for my 1978 Dodge Diplomat Medallion?

What brands make parts for the 1978 Dodge Diplomat Medallion?

How fast do 1978 Dodge Diplomat Medallion parts ship?

What warranty do your 1978 Dodge Diplomat Medallion parts come with?