52 Cooling system parts are listed for the 1978 Fiat 124, in 8 part types, covering the 1.8L L4 engine. Each one has a brand, a manufacturer part number and notes that say where it fits.
The cooling system system on the 1978 Fiat 124 keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses. The largest groups are Coolant / Antifreeze (16 parts), Radiator Hose (15 parts) and Radiator Cap (7 parts). The other 5 part types cover the remaining 14 parts.
Every part on this page is matched to the 1.8L L4 — the only engine offered in the 1978 Fiat 124.
The most listed brands for 1978 Fiat 124 cooling system parts are PEAK (7 parts), GATES (7 parts) and ACDELCO (6 parts), plus 15 more brands. Quality grades include Standard Replacement, Economy and Premium.
10 parts on this 1978 Fiat 124 page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including FVP MV5050GAL (Coolant / Antifreeze) and GATES 31527 (Radiator Cap). Click any part number to see 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 for the 1978 Fiat 124 come from 4 brands — PEAK, PRESTONE, FVP and 1 other brand. The "Popular" part is FVP MV5050GAL.
In the Compatible With All Colors grade, PRESTONE supplies 1 part: grouped under the catalog's "Compatible With All Colors" designation — the notes column spells out what sets them apart. A representative part number is PRESTONE AF3055.
The Economy section lists 4 options from FVP, PRESTONE, PEAK and 1 other brand — the catalog's value-priced group. FVP MV5050GAL is listed in this group.
In the Heavy Duty grade, VALVOLINE supplies 1 part: rated for severe service. A representative part number is VALVOLINE ZXG051.
In the Premium grade, PRESTONE and PEAK supply 4 parts: a step above OE specification in materials, tolerances or warranty terms. A representative part number is PRESTONE AF2100.
In the Standard Replacement grade, PEAK, FVP and PRESTONE supply 6 parts: built to original-equipment specification. A representative part number is FVP GREEN5050GAL.
Coolant Hose / Pipe
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO | 31006 | 🇺🇸 US 🇨🇦 CA | Gold / ProfessionalStraight | View on Amazon |
This table covers the hard pipes and extra hoses in the coolant circuit.
This group shows a single part: ACDELCO 31006.
Cooling System Tester Adapter
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO | 12A01 | 🇺🇸 US 🇨🇦 CA | ProfessionalIncluded In Tester | View on Amazon |
| GATES | 31413 | 🇺🇸 US 🇨🇦 CA | Cooling System PressureRadiator Cap | View on Amazon |
| MOTORAD | 3003 | 🇺🇸 US 🇨🇦 CA | StandardIncluded In Tester Kit | View on Amazon |
This table covers the adapters used to pressure-test this cooling system.
3 Cooling System Tester Adapter parts for the 1978 Fiat 124 come from 3 brands — ACDELCO, GATES and MOTORAD.
Part numbers include ACDELCO 12A01, GATES 31413 and MOTORAD 3003.
Radiator Cap
Locking Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES | 31511 | 🇺🇸 US 🇨🇦 CA | Safety Release Radiator Cap | View on Amazon |
| MOTORAD | ST13 | 🇺🇸 US 🇨🇦 CA | Safety Lever | View on Amazon |
| SKP | SKST13 | 🇺🇸 US 🇨🇦 CA | Relief Pressure 13 lbs | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES Popular | 31527 | 🇺🇸 US 🇨🇦 CA | OE Type | View on Amazon |
| MOTORAD Popular | T13 | 🇺🇸 US 🇨🇦 CA | Standard | View on Amazon |
| CALORSTAT | RC0052 | 🇺🇸 US 🇨🇦 CA | Includes 2 sealsMetallic | View on Amazon |
| SKP | SK10229 | 🇺🇸 US 🇨🇦 CA | Pressure Rating 13 psi | 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.
7 Radiator Cap parts for the 1978 Fiat 124 come from 4 brands — GATES, MOTORAD, SKP and 1 other brand. The "Popular" part is GATES 31527.
In the Locking Replacement grade, GATES, MOTORAD and SKP supply 3 parts: grouped under the catalog's "Locking Replacement" designation — the notes column spells out what sets them apart. A representative part number is GATES 31511.
Standard Replacement: 4 parts, from GATES, MOTORAD, CALORSTAT and 1 other brand. A representative part number is GATES 31527.
Listed part numbers: GATES 31527, GATES 31511 and MOTORAD ST13, plus the other parts above.
Radiator Hose
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DAYCO | 81041 | 🇺🇸 US 🇨🇦 CA | Flex Radiator Hose | View on Amazon |
| DAYCO | 81031 | 🇺🇸 US 🇨🇦 CA | Flex Radiator Hose | View on Amazon |
| GATES | 25251 | 🇺🇸 US 🇨🇦 CA | Flexible | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DAYCO Popular | 70687 | 🇺🇸 US 🇨🇦 CA | Curved | View on Amazon |
| GATES Popular | 20137 | 🇺🇸 US 🇨🇦 CA | Molded | View on Amazon |
| GATES Popular | 20661 | 🇺🇸 US 🇨🇦 CA | Molded | View on Amazon |
| ACDELCO | 20064S | 🇺🇸 US 🇨🇦 CA | Professional / GoldMolded | View on Amazon |
| ACDELCO | 20046S | 🇺🇸 US 🇨🇦 CA | Professional / GoldMolded | View on Amazon |
| ACDELCO | 31610 | 🇺🇸 US 🇨🇦 CA | Gold / ProfessionalFlexible | View on Amazon |
| ACDELCO | 20002S | 🇺🇸 US 🇨🇦 CA | Professional / GoldMolded | View on Amazon |
| CONTINENTAL | 61055 | 🇺🇸 US 🇨🇦 CA | Molded | View on Amazon |
| DAYCO | 70846 | 🇺🇸 US 🇨🇦 CA | Curved | View on Amazon |
| DAYCO | 70831 | 🇺🇸 US 🇨🇦 CA | Curved | View on Amazon |
| GATES | 20774 | 🇺🇸 US 🇨🇦 CA | Molded | View on Amazon |
Universal Hose (Straight, Bulk)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DAYCO | 76138 | 🇺🇸 US 🇨🇦 CA | Straight - Priced Per Foot | 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.
15 Radiator Hose parts are listed for the 1978 Fiat 124, from DAYCO, GATES, ACDELCO and 1 other brand. DAYCO 70687 carries the "Popular" badge.
Economy: 3 parts, from DAYCO and GATES. A representative part number is DAYCO 81041.
The Standard Replacement section: 11 options from ACDELCO, DAYCO, GATES and 1 other brand. DAYCO 70687 is listed in this group.
The Universal Hose (Straight, Bulk) section lists 1 option from DAYCO — grouped under the catalog's "Universal Hose (Straight, Bulk)" designation — the notes column spells out what sets them apart. DAYCO 76138 is listed in this group.
Temperature Sender / Sensor
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ULTRA-POWER | 1T1112 | 🇺🇸 US 🇨🇦 CA | Sender | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ROSTRA | 680098 | 🇺🇸 US 🇨🇦 CA | Sender | View on Amazon |
| STANDARD MOTOR PRODUCTS | TS109 | 🇺🇸 US 🇨🇦 CA | with Gauge | View on Amazon |
| WELLS | 1T1112 | 🇺🇸 US 🇨🇦 CA | with Gauge | View on Amazon |
This table covers the senders that report coolant temperature to the gauge or ECU. Typical signs include a gauge that sits on empty or overheat, or a lamp that does not match what the engine is doing. Rule out the cluster and the wiring before replacing the sender.
4 Temperature Sender / Sensor parts for the 1978 Fiat 124 come from 4 brands — ULTRA-POWER, ROSTRA, STANDARD MOTOR PRODUCTS and 1 other brand.
The Economy section: 1 option from ULTRA-POWER. ULTRA-POWER 1T1112 is listed in this group.
Standard Replacement: 3 parts, from ROSTRA, STANDARD MOTOR PRODUCTS and WELLS. A representative part number is ROSTRA 680098.
Part numbers include ULTRA-POWER 1T1112, ROSTRA 680098 and STANDARD MOTOR PRODUCTS TS109, among others listed above.
Thermostat
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD | 256180 | 🇺🇸 US 🇨🇦 CA | Includes Housing, Thermostat | View on Amazon |
This table covers the thermostats that open the coolant circuit at the specified temperature. Typical signs include slow warm-up, a gauge that climbs in traffic, or heat that never quite arrives. Replace the housing gasket with the thermostat and bleed the system so a trapped air pocket does not cook the new part.
One part is listed for the 1978 Fiat 124 — MOTORAD 256180.
Water Pump
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BECK/ARNLEY | 1310309 | 🇺🇸 US 🇨🇦 CA | Includes Gasket | View on Amazon |
| FVP | US9003 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| US MOTOR WORKS | US9003 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GMB Popular | 1231030 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| FVP | 1231030 | 🇺🇸 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 are listed for the 1978 Fiat 124, from FVP, BECK/ARNLEY, US MOTOR WORKS and 1 other brand. GMB 1231030 carries the "Popular" badge.
Economy: 3 parts, from BECK/ARNLEY, FVP and US MOTOR WORKS. A representative part number is BECK/ARNLEY 1310309.
The Standard Replacement section: 2 options from GMB and FVP. GMB 1231030 is listed in this group.
This group includes GMB 1231030, BECK/ARNLEY 1310309 and FVP US9003 and the remaining parts above.
Buying Cooling System Parts for a 1978 Fiat 124
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 1.8L L4 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 Radiator Hose .
Frequently Asked Questions
How many cooling system parts fit the 1978 Fiat 124?
Our catalog currently lists 52 cooling system parts for the 1978 Fiat 124 across 8 subcategories and 18 brands, covering the 1.8L L4 engine. Each part is matched to the engine(s) it fits.
What are the signs of cooling system problems on a 1978 Fiat 124?
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 Fiat 124 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 Fiat 124?
Every part on this page is matched to the 1.8L L4 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 Fiat 124
Cooling System Parts for Other Fiat 124 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.