38 Cooling system parts are listed for the 1973 Avanti Ii, in 6 part types, covering the 6.6L 400cid V8 engine. Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 1973 Avanti Ii, 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. Most of the listed parts are Coolant / Antifreeze (16 parts), Water Pump Gasket (6 parts) and Thermostat / Thermostat Housing / Water Outlet Seal (5 parts). The other 3 part types cover the remaining 11 parts.
The 1973 Avanti Ii came with a single engine, the 6.6L 400cid V8, and every part is verified against it.
13 brands supply cooling system parts for the 1973 Avanti Ii, led by PEAK (7 parts), PRESTONE (5 parts) and FEL-PRO (5 parts), plus 10 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 1973 Avanti Ii. 8 parts have it, including FVP MV5050GAL (Coolant / Antifreeze) and FEL-PRO 35062 (Thermostat / Thermostat Housing / Water Outlet Seal). 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 🇨🇦 CA | Prime YellowAll Vehicles | View on Amazon |
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Popular | MV5050GAL | 🇺🇸 US 🇨🇦 CA | Extended LifeAll Makes / All Models | View on Amazon |
| PRESTONE Popular | AF3100 | 🇺🇸 US 🇨🇦 CA | Prime Yellow - All VehiclesExtended Life | View on Amazon |
| PEAK | BQA1GAL | 🇺🇸 US 🇨🇦 CA | Blue Mountain Long LifeAll Vehicle | View on Amazon |
| VALVOLINE | 719009 | 🇺🇸 US 🇨🇦 CA | Multi-Vehicle Yellow1 Gallon | View on Amazon |
Heavy Duty
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Popular | ZXG051 | 🇺🇸 US 🇨🇦 CA | G05 Yellow1 Gallon | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Popular | AF2100 | 🇺🇸 US 🇨🇦 CA | All Vehicles10yr/300k mi | View on Amazon |
| PEAK | PKP1GAL | 🇺🇸 US 🇨🇦 CA | All Vehicles Antifreeze1 Gallon | View on Amazon |
| PEAK | PXA1GAL | 🇺🇸 US 🇨🇦 CA | Global Lifetime1 Gallon | View on Amazon |
| PRESTONE | AFMAX | 🇺🇸 US 🇨🇦 CA | Max Universal1 Gallon | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP | GREEN5050GAL | 🇺🇸 US 🇨🇦 CA | Low Silicate Blend1 Gallon | View on Amazon |
| PEAK | BMA1GAL | 🇺🇸 US 🇨🇦 CA | Blue Mountain Conventional Green1 Gallon | View on Amazon |
| PEAK | RUA1GAL | 🇺🇸 US 🇨🇦 CA | Conventional Green1 Gallon | View on Amazon |
| PEAK | FFA1GAL | 🇺🇸 US 🇨🇦 CA | Full Force Conventional Green1 Gallon | View on Amazon |
| PEAK | SEP1GAL | 🇺🇸 US 🇨🇦 CA | Sierra Conventional Green Concentrate Low Toxic Option1 Gallon | View on Amazon |
| PRESTONE | AF3300 | 🇺🇸 US 🇨🇦 CA | 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 1973 Avanti Ii, 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 Heavy Duty section lists 1 option from VALVOLINE — rated for severe service. VALVOLINE ZXG051 is listed in this group.
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 6 options from PEAK, FVP and PRESTONE — built to original-equipment specification. FVP GREEN5050GAL is listed in this group.
Radiator Hose
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CONTINENTAL | 52418 | 🇨🇦 CA | FlexibleHose 1 Length: 16.31 In | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CONTINENTAL | 60702 | 🇨🇦 CA | Molded | View on Amazon |
| CONTINENTAL | 61301 | 🇨🇦 CA | Molded | View on Amazon |
This table covers the upper, lower and connecting hoses between radiator, engine and reservoir. Typical signs include swelling, cracks, a soft spot, or a leak at a clamp. Replace adjacent aged hoses while the system is drained — they share the same heat cycle.
3 Radiator Hose parts for the 1973 Avanti Ii come from CONTINENTAL.
The Economy section: 1 option from CONTINENTAL. CONTINENTAL 52418 is listed in this group.
Standard Replacement: 2 parts, from CONTINENTAL. A representative part number is CONTINENTAL 60702.
This group includes CONTINENTAL 52418, CONTINENTAL 60702 and CONTINENTAL 61301.
Thermostat / Thermostat Housing / Water Outlet Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FEL-PRO Popular | 35062 | 🇺🇸 US 🇨🇦 CA | 1-13/16 (In) Inside DiameterComposite Material | View on Amazon |
| FEL-PRO | 35562T | 🇺🇸 US 🇨🇦 CA | Permadryplus | View on Amazon |
| MAHLE / CLEVITE | C24109 | 🇺🇸 US 🇨🇦 CA | PaperUniversal Type | View on Amazon |
| MAHLE / CLEVITE | C32721 | 🇺🇸 US 🇨🇦 CA | Molded Rubber with Plastic CarrierWater Outlet Seal | View on Amazon |
| VICTOR REINZ | 711359200 | 🇺🇸 US 🇨🇦 CA | Rigid Carrierwith 2 Bolt Holes | 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.
5 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 1973 Avanti Ii, from FEL-PRO, MAHLE / CLEVITE and VICTOR REINZ. FEL-PRO 35062 carries the "Popular" badge.
Listed part numbers: FEL-PRO 35062, FEL-PRO 35562T and MAHLE / CLEVITE C24109, plus the other parts above.
Water Pump
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP | US1109 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| US MOTOR WORKS | US1109 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WJB / INMOTION PARTS | WU1109 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DAYCO Popular | DP1003 | 🇺🇸 US 🇨🇦 CA | Standard Dutywith Belt Driven Pump | View on Amazon |
| GMB | 1301270 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the pumps that circulate coolant through the block and radiator. Typical signs include coolant at the weep hole, pulley play, or a growl from the front of the engine. Replace the thermostat and refill with the specified coolant whenever the pump comes off.
5 Water Pump parts for the 1973 Avanti Ii come from 5 brands — FVP, US MOTOR WORKS, WJB / INMOTION PARTS and 2 other brands. The "Popular" part is DAYCO DP1003.
The Economy section: 3 options from FVP, US MOTOR WORKS and WJB / INMOTION PARTS. FVP US1109 is listed in this group.
Standard Replacement: 2 parts, from DAYCO and GMB. A representative part number is DAYCO DP1003.
This group includes DAYCO DP1003, FVP US1109 and WJB / INMOTION PARTS WU1109 and the remaining parts above.
Water Pump Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FEL-PRO Popular | 5152 | 🇺🇸 US 🇨🇦 CA | To Block3 Bolt Gasket | View on Amazon |
| FEL-PRO Popular | ES73030 | 🇺🇸 US 🇨🇦 CA | Gasket Kit | View on Amazon |
| FEL-PRO | 13032 | 🇺🇸 US 🇨🇦 CA | To BlockBacking Plate | View on Amazon |
| MAHLE / CLEVITE | K27091 | 🇺🇸 US 🇨🇦 CA | Paper | View on Amazon |
| VICTOR REINZ | 711465400 | 🇺🇸 US 🇨🇦 CA | Paper | View on Amazon |
| VICTOR REINZ | 711465700 | 🇺🇸 US 🇨🇦 CA | Paper | 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.
6 Water Pump Gasket parts are listed for the 1973 Avanti Ii, from FEL-PRO, VICTOR REINZ and MAHLE / CLEVITE. FEL-PRO 5152 carries the "Popular" badge.
Listed part numbers: FEL-PRO 5152, FEL-PRO ES73030 and FEL-PRO 13032, plus the other parts above.
Water Pump Stud Kit
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ARP | 1343204 | 🇺🇸 US 🇨🇦 CA | Hex Bolt Head | View on Amazon |
| ARP | 1343203 | 🇺🇸 US 🇨🇦 CA | Black Oxide12 Point Bolt Head | View on Amazon |
| ARP | 4343203 | 🇺🇸 US 🇨🇦 CA | Stainless Steel12 Point Bolt Head | View on Amazon |
This table covers the Water Pump Stud kits.
3 Water Pump Stud Kit parts for the 1973 Avanti Ii come from ARP.
Listed part numbers: ARP 1343204, ARP 1343203 and ARP 4343203.
Buying Cooling System Parts for a 1973 Avanti Ii
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 6.6L 400cid 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 1973 Avanti Ii?
Our catalog currently lists 38 cooling system parts for the 1973 Avanti Ii across 6 subcategories and 13 brands, covering the 6.6L 400cid V8 engine. Each part is matched to the engine(s) it fits.
What are the signs of cooling system problems on a 1973 Avanti Ii?
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 1973 Avanti Ii 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 1973 Avanti Ii?
Every part on this page is matched to the 6.6L 400cid 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 1973 Avanti Ii
Cooling System Parts for Other Avanti Ii Years
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