24 Cooling system parts are listed for the 1978 Excalibur Phaeton, in 3 part types, covering the 7.4L 454cid V8 engine. Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 1978 Excalibur Phaeton, the cooling system system keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses. All 24 listed parts are Coolant / Antifreeze (16 parts), Water Pump Gasket (5 parts) and Thermostat / Thermostat Housing / Water Outlet Seal (3 parts).
The 1978 Excalibur Phaeton came with a single engine, the 7.4L 454cid V8, and every part is verified against it.
6 brands supply cooling system parts for the 1978 Excalibur Phaeton, led by PEAK (7 parts), PRESTONE (5 parts) and FEL-PRO (4 parts), plus 3 more brands. Quality grades include Standard Replacement, Economy and Premium.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 1978 Excalibur Phaeton. 5 parts have it, including FVP MV5050GAL (Coolant / Antifreeze) and FEL-PRO 30060 (Water Pump Gasket). Each part number opens a page with every vehicle that part fits.
Coolant / Antifreeze
Compatible With All Colors
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE | AF3055 | 🇺🇸 US | Prime YellowAll Vehicles | View on Amazon |
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Popular | MV5050GAL | 🇺🇸 US | Extended LifeAll Makes / All Models | View on Amazon |
| PRESTONE Popular | AF3100 | 🇺🇸 US | Prime Yellow - All VehiclesExtended Life | View on Amazon |
| PEAK | BQA1GAL | 🇺🇸 US | Blue Mountain Long LifeAll Vehicle | View on Amazon |
| VALVOLINE | 719009 | 🇺🇸 US | Multi-Vehicle Yellow1 Gallon | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Popular | AF2100 | 🇺🇸 US | All Vehicles10yr/300k mi | View on Amazon |
| PEAK | PKP1GAL | 🇺🇸 US | All Vehicles Antifreeze1 Gallon | View on Amazon |
| PEAK | PXA1GAL | 🇺🇸 US | Global Lifetime1 Gallon | View on Amazon |
| PRESTONE | AFMAX | 🇺🇸 US | Max Universal1 Gallon | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Popular | ZX001 | 🇺🇸 US | Original Green1 Gallon | View on Amazon |
| FVP | GREEN5050GAL | 🇺🇸 US | Low Silicate Blend1 Gallon | View on Amazon |
| PEAK | BMA1GAL | 🇺🇸 US | Blue Mountain Conventional Green1 Gallon | View on Amazon |
| PEAK | RUA1GAL | 🇺🇸 US | Conventional Green1 Gallon | View on Amazon |
| PEAK | FFA1GAL | 🇺🇸 US | Full Force Conventional Green1 Gallon | View on Amazon |
| PEAK | SEP1GAL | 🇺🇸 US | Sierra Conventional Green Concentrate Low Toxic Option1 Gallon | View on Amazon |
| PRESTONE | AF3300 | 🇺🇸 US | Prime Conventional Green 1 Gallon | View on Amazon |
This table covers the engine coolants and antifreeze formulations specified for this cooling system. Typical signs include a rising temperature gauge, rusty or sludged coolant, or a heater that blows cold. Use the chemistry named in the notes. Mixing silicate, OAT and HOAT formulas can gel in the radiator.
16 Coolant / Antifreeze parts are listed for the 1978 Excalibur Phaeton, from PEAK, PRESTONE, FVP and 1 other brand. FVP MV5050GAL carries the "Popular" badge.
The Compatible With All Colors section lists 1 option from PRESTONE — grouped under the catalog's "Compatible With All Colors" designation — the notes column spells out what sets them apart. PRESTONE AF3055 is listed in this group.
In the Economy grade, FVP, PRESTONE, PEAK and 1 other brand supply 4 parts: the catalog's value-priced group. A representative part number is FVP MV5050GAL.
The Premium section lists 4 options from PRESTONE and PEAK — a step above OE specification in materials, tolerances or warranty terms. PRESTONE AF2100 is listed in this group.
The Standard Replacement section lists 7 options from PEAK, VALVOLINE, FVP and 1 other brand — built to original-equipment specification. VALVOLINE ZX001 is listed in this group.
Thermostat / Thermostat Housing / Water Outlet Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FEL-PRO | 35062 | 🇺🇸 US | 1-13/16 (In) Inside DiameterComposite Material | View on Amazon |
| FEL-PRO | 35562T | 🇺🇸 US | Permadryplus | View on Amazon |
| VICTOR REINZ | 711359200 | 🇺🇸 US | Rigid CarrierWater Outlet | View on Amazon |
This table covers the seals at the thermostat housing and water outlet. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.
3 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 1978 Excalibur Phaeton, from FEL-PRO and VICTOR REINZ.
This group includes FEL-PRO 35062, FEL-PRO 35562T and VICTOR REINZ 711359200.
Water Pump Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FEL-PRO Popular | 30060 | 🇺🇸 US | To Block | View on Amazon |
| FEL-PRO | 11725 | 🇺🇸 US | To BlockBacking Plate | View on Amazon |
| VICTOR REINZ | 711409500 | 🇺🇸 US | To Block | View on Amazon |
| VICTOR REINZ | 711465600 | 🇺🇸 US | Paper | View on Amazon |
| VICTOR REINZ | 711400300 | 🇺🇸 US | Improved Design | View on Amazon |
This table covers the gaskets between the water pump and the block or housing. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for.
5 Water Pump Gasket parts are listed for the 1978 Excalibur Phaeton, from VICTOR REINZ and FEL-PRO. FEL-PRO 30060 carries the "Popular" badge.
Part numbers include FEL-PRO 30060, FEL-PRO 11725 and VICTOR REINZ 711409500, among others listed above.
Buying Cooling System Parts for a 1978 Excalibur Phaeton
On this vehicle, the cooling system system keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses.
- Confirm you have the 7.4L 454cid V8 engine — every part on this page is matched to it.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Coolant / Antifreeze and Water Pump Gasket .
Frequently Asked Questions
How many cooling system parts fit the 1978 Excalibur Phaeton?
Our catalog currently lists 24 cooling system parts for the 1978 Excalibur Phaeton across 3 subcategories and 6 brands, covering the 7.4L 454cid V8 engine. Each part is matched to the engine(s) it fits.
What are the signs of cooling system problems on a 1978 Excalibur Phaeton?
Common symptoms include a rising temperature gauge in traffic, sweet-smelling steam, crusty deposits around hose clamps, or a heater that blows cold. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, replace the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 1978 Excalibur Phaeton was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 1978 Excalibur Phaeton?
Every part on this page is matched to the 7.4L 454cid V8 engine. Then replace coolant with the exact specification the manufacturer calls for — mixing chemistries can gel and block small passages. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 1978 Excalibur Phaeton
Cooling System Parts for Other Excalibur Phaeton Years
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