This page lists 24 cooling system parts for the 1965 Fiat 1100, across 4 part types, covering both the 1.1L L4 and the 1.2L L4. Every part shows its brand, manufacturer part number and fitment notes.
On the 1965 Fiat 1100, 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 (15 parts), Radiator Cap (4 parts) and Radiator Hose (4 parts). The other 1 part type covers the remaining 1 part.
The 1965 Fiat 1100 was sold with both the 1.1L L4 and the 1.2L L4. 19 parts fit every engine; the other 5 are engine-specific. Each part shows which engine(s) it fits.
9 brands supply cooling system parts for the 1965 Fiat 1100, led by PEAK (7 parts), PRESTONE (5 parts) and MOTORAD (3 parts), plus 6 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 1965 Fiat 1100. 3 parts have it, including FVP MV5050GAL (Coolant / Antifreeze) and PRESTONE AF3100 (Coolant / Antifreeze). 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 Fits: all 1965 1100 engines | AF3055 | 🇺🇸 US | Prime YellowAll Vehicles | View on Amazon |
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Popular Fits: all 1965 1100 engines | MV5050GAL | 🇺🇸 US | Extended LifeAll Makes / All Models | View on Amazon |
| PRESTONE Popular Fits: all 1965 1100 engines | AF3100 | 🇺🇸 US | Prime Yellow - All VehiclesExtended Life | View on Amazon |
| PEAK Fits: all 1965 1100 engines | BQA1GAL | 🇺🇸 US | Blue Mountain Long LifeAll Vehicle | View on Amazon |
| VALVOLINE Fits: all 1965 1100 engines | 719009 | 🇺🇸 US | Multi-Vehicle Yellow1 Gallon | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Popular Fits: all 1965 1100 engines | AF2100 | 🇺🇸 US | All Vehicles10yr/300k mi | View on Amazon |
| PEAK Fits: all 1965 1100 engines | PKP1GAL | 🇺🇸 US | All Vehicles Antifreeze1 Gallon | View on Amazon |
| PEAK Fits: all 1965 1100 engines | PXA1GAL | 🇺🇸 US | Global Lifetime1 Gallon | View on Amazon |
| PRESTONE Fits: all 1965 1100 engines | AFMAX | 🇺🇸 US | Max Universal1 Gallon | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Fits: all 1965 1100 engines | GREEN5050GAL | 🇺🇸 US | Low Silicate Blend1 Gallon | View on Amazon |
| PEAK Fits: all 1965 1100 engines | BMA1GAL | 🇺🇸 US | Blue Mountain Conventional Green1 Gallon | View on Amazon |
| PEAK Fits: all 1965 1100 engines | RUA1GAL | 🇺🇸 US | Conventional Green1 Gallon | View on Amazon |
| PEAK Fits: all 1965 1100 engines | FFA1GAL | 🇺🇸 US | Full Force Conventional Green1 Gallon | View on Amazon |
| PEAK Fits: all 1965 1100 engines | SEP1GAL | 🇺🇸 US | Sierra Conventional Green Concentrate Low Toxic Option1 Gallon | View on Amazon |
| PRESTONE Fits: all 1965 1100 engines | 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.
15 Coolant / Antifreeze parts are listed for the 1965 Fiat 1100, from PEAK, PRESTONE, FVP and 1 other brand. FVP MV5050GAL carries the "Popular" badge. All of them fit every engine offered in the 1965 1100.
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 6 options from PEAK, FVP and PRESTONE — built to original-equipment specification. FVP GREEN5050GAL is listed in this group.
Cooling System Tester Adapter
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD Fits: all 1965 1100 engines | 3003 | 🇺🇸 US | StandardIncluded In Tester Kit | View on Amazon |
This table covers the adapters used to pressure-test this cooling system.
One part is listed for the 1965 Fiat 1100 — MOTORAD 3003.
Radiator Cap
Locking Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD Fits: all 1965 1100 engines | ST4 | 🇺🇸 US | Safety Lever | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CALORSTAT Fits: all 1965 1100 engines | RC0068 | 🇺🇸 US | PerformanceIncludes 2 seals | View on Amazon |
| GATES Fits: 1.2L L4 | 31524 | 🇺🇸 US | OE Type | View on Amazon |
| MOTORAD Fits: all 1965 1100 engines | T4 | 🇺🇸 US | Standard | View on Amazon |
This table covers the caps that hold system pressure at the radiator or reservoir neck. Typical signs include a leak at the neck, a cap that will not hold pressure, or a missing tether. Match the pressure rating or thread in the notes — radiator, reservoir and fuel caps are not interchangeable.
4 Radiator Cap parts are listed for the 1965 Fiat 1100, from MOTORAD, CALORSTAT and GATES. 3 parts fit every engine; the other 1 is engine-specific.
The Locking Replacement section lists 1 option from MOTORAD — grouped under the catalog's "Locking Replacement" designation — the notes column spells out what sets them apart. MOTORAD ST4 is listed in this group.
The Standard Replacement section: 3 options from CALORSTAT, GATES and MOTORAD. CALORSTAT RC0068 is listed in this group.
Part numbers include MOTORAD ST4, CALORSTAT RC0068 and GATES 31524, among others listed above.
Radiator Hose
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES Fits: 1.2L L4 | 25473 | 🇺🇸 US | Flexible | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Fits: 1.2L L4 | 20000S | 🇺🇸 US 🇨🇦 CA | Professional / GoldMolded | View on Amazon |
| DAYCO Fits: 1.2L L4 | 71011 | 🇺🇸 US | Curved | View on Amazon |
| GATES Fits: 1.2L L4 | 20065 | 🇺🇸 US | 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.
4 Radiator Hose parts for the 1965 Fiat 1100 come from 3 brands — GATES, ACDELCO and DAYCO.
The Economy section: 1 option from GATES. GATES 25473 is listed in this group.
Standard Replacement: 3 parts, from ACDELCO, DAYCO and GATES. A representative part number is ACDELCO 20000S.
This group includes GATES 25473, ACDELCO 20000S and DAYCO 71011 and the remaining parts above.
Buying Cooling System Parts for a 1965 Fiat 1100
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.
- Match the engine first. Some cooling system parts fit every engine; others are engine-specific. Each row shows which engine(s) it fits.
- 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 Radiator Cap .
Frequently Asked Questions
How many cooling system parts fit the 1965 Fiat 1100?
Our catalog currently lists 24 cooling system parts for the 1965 Fiat 1100 across 4 subcategories and 9 brands, covering both the 1.1L L4 and the 1.2L L4. Each part is matched to the engine(s) it fits.
Do cooling system parts differ between 1965 Fiat 1100 engines?
Some do. 19 parts fit every engine; the other 5 are engine-specific. Each row (and the filter at the top) shows which. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of cooling system problems on a 1965 Fiat 1100?
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 1965 Fiat 1100 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 1965 Fiat 1100?
First match the engine — each row shows which engine(s) the part fits. 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 1965 Fiat 1100
Cooling System Parts for Other Fiat 1100 Years
Switch vehicle or jump to a subcategory
Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.