1979 Fiat X-1/9 Cooling System Parts

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. Read more

16 Coolant / Antifreeze parts for the 1979 Fiat X-1/9 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.

This table covers the hard pipes and extra hoses in the coolant circuit. Read more

4 Coolant Hose / Pipe parts for the 1979 Fiat X-1/9 come from 4 brands — ACDELCO, CONTINENTAL, DAYCO and 1 other brand.

Part numbers include ACDELCO 20260S, CONTINENTAL 66550 and DAYCO 70112, among others listed above.

This table covers the adapters used to pressure-test this cooling system. Read more

3 Cooling System Tester Adapter parts for the 1979 Fiat X-1/9 come from 3 brands — ACDELCO, GATES and MOTORAD.

Listed part numbers: ACDELCO 12A01, GATES 31413 and MOTORAD 3003.

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. Read more

7 Radiator Cap parts for the 1979 Fiat X-1/9 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.

This group includes GATES 31527, GATES 31511 and MOTORAD ST13 and the remaining parts above.

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. Read more

7 Radiator Hose parts are listed for the 1979 Fiat X-1/9, from GATES, DAYCO, ACDELCO and 1 other brand. DAYCO 70938 carries the "Popular" badge.

Economy: 1 part, from GATES. A representative part number is GATES 25262.

The Standard Replacement section: 6 options from DAYCO, GATES, ACDELCO and 1 other brand. DAYCO 70938 is listed in this group.

Part numbers include DAYCO 70938, GATES 25262 and GATES 20808, among others listed above.

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. Read more

7 Thermostat parts are listed for the 1979 Fiat X-1/9, from BECK/ARNLEY, GATES and MOTORAD. GATES 33208 carries the "Popular" badge.

Part numbers include GATES 33208, GATES 33209 and BECK/ARNLEY 1430640, among others listed above.

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. Read more

3 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 1979 Fiat X-1/9 come from 2 brands — GATES and MOTORAD.

Listed part numbers: GATES 34030, GATES 33635 and MOTORAD MG40.

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. Read more

6 Water Pump parts are listed for the 1979 Fiat X-1/9, from FVP, US MOTOR WORKS and GMB. US MOTOR WORKS US9084 carries the "Popular" badge.

Economy: 4 parts, from US MOTOR WORKS and FVP. A representative part number is US MOTOR WORKS US9084.

The Standard Replacement section: 2 options from GMB and FVP. GMB 1232020 is listed in this group.

Listed part numbers: US MOTOR WORKS US9084 and FVP US9085, plus the other parts above.