1978 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 are listed for the 1978 Fiat X-1/9, 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.

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

4 Coolant Hose / Pipe parts are listed for the 1978 Fiat X-1/9, from ACDELCO, CONTINENTAL, DAYCO and 1 other brand.

Part numbers include ACDELCO 20260S, CONTINENTAL 60083 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 are listed for the 1978 Fiat X-1/9, from 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 are listed for the 1978 Fiat X-1/9, from GATES, MOTORAD, SKP and 1 other brand. GATES 31527 carries the "Popular" badge.

The Locking Replacement section lists 3 options from GATES, MOTORAD and SKP — grouped under the catalog's "Locking Replacement" designation — the notes column spells out what sets them apart. GATES 31511 is listed in this group.

The Standard Replacement section: 4 options from GATES, MOTORAD, CALORSTAT and 1 other brand. GATES 31527 is listed in this group.

Part numbers include GATES 31527, GATES 31511 and MOTORAD ST13, among others listed 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

5 Radiator Hose parts for the 1978 Fiat X-1/9 come from 4 brands — CONTINENTAL, DAYCO, ACDELCO and 1 other brand. The "Popular" part is DAYCO 71189.

This group includes DAYCO 71189, ACDELCO 20077S and CONTINENTAL 61267 and the remaining parts above.

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. Read more

3 Temperature Sender / Sensor parts are listed for the 1978 Fiat X-1/9, from ULTRA-POWER, ROSTRA and WELLS.

Economy: 1 part, from ULTRA-POWER. A representative part number is ULTRA-POWER 1T1112.

The Standard Replacement section: 2 options from ROSTRA and WELLS. ROSTRA 680098 is listed in this group.

Part numbers include ULTRA-POWER 1T1112 and ROSTRA 680098, 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 for the 1978 Fiat X-1/9 come from 3 brands — BECK/ARNLEY, GATES and MOTORAD. The "Popular" part is GATES 33208.

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 are listed for the 1978 Fiat X-1/9, from GATES and MOTORAD.

This group includes 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

4 Water Pump parts for the 1978 Fiat X-1/9 come from 4 brands — BECK/ARNLEY, FVP, US MOTOR WORKS and 1 other brand.

The Economy section: 3 options from BECK/ARNLEY, FVP and US MOTOR WORKS. BECK/ARNLEY 1312347 is listed in this group.

Standard Replacement: 1 part, from GMB. A representative part number is GMB 1231010.

Listed part numbers: BECK/ARNLEY 1312347 and FVP US9084, plus the other parts above.