1989 Geo Spectrum 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

17 Coolant / Antifreeze parts are listed for the 1989 Geo Spectrum, from PEAK, PRESTONE, FVP and 1 other brand. FVP MV5050GAL carries the "Popular" badge. All of them fit every engine offered in the 1989 Spectrum.

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, PEAK, PRESTONE 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 7 options from PEAK, FVP and PRESTONE — built to original-equipment specification. FVP DEX5050GAL is listed in this group.

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

2 Coolant Hose / Pipe parts are listed for the 1989 Geo Spectrum, from CONTINENTAL and DAYCO. 1 part fits every engine; the other 1 is engine-specific.

Part numbers include CONTINENTAL 63032 and DAYCO 71307.

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

4 Cooling System Tester Adapter parts are listed for the 1989 Geo Spectrum, from MOTORAD, GATES and STANT. All of them fit every engine offered in the 1989 Spectrum.

This group includes GATES 31428, MOTORAD 3121 and MOTORAD 3122 and the remaining parts above.

This table covers the radiators that dump engine heat to airflow through the core. Typical signs include overheating in traffic, a wet core, or coolant that disappears with no puddle. Replace the cap if it cannot hold the rated pressure, and bleed the system after the swap. Read more

3 Radiator parts are listed for the 1989 Geo Spectrum, from TECHPRO and FVP. All of them fit every engine offered in the 1989 Spectrum.

Economy: 2 parts, from TECHPRO. A representative part number is TECHPRO GM3010374.

The Standard Replacement section: 1 option from FVP. FVP RAD857 is listed in this group.

This group includes TECHPRO GM3010374, TECHPRO GM3010375 and FVP RAD857.

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

6 Radiator Cap parts are listed for the 1989 Geo Spectrum, from GATES, MOTORAD, CALORSTAT and 1 other brand. MOTORAD T16R carries the "Popular" badge. All of them fit every engine offered in the 1989 Spectrum.

The Locking Replacement section lists 3 options from CALORSTAT, GATES and MOTORAD — grouped under the catalog's "Locking Replacement" designation — the notes column spells out what sets them apart. CALORSTAT RC0212 is listed in this group.

The Standard Replacement section: 3 options from MOTORAD, SKP and GATES. MOTORAD T16R is listed in this group.

Listed part numbers: MOTORAD T16R, CALORSTAT RC0212 and GATES 31534, plus the other parts above.

This table covers the Radiator Fan motors. Typical signs include no motion, a squeal, or a motor that only runs on one speed. Confirm power, ground and the control module before replacing the motor. Read more

5 Radiator Fan Motor parts are listed for the 1989 Geo Spectrum, from FOUR SEASONS, VDO / CONTINENTAL and ACDELCO.

This group includes ACDELCO 22134671, FOUR SEASONS 35656 and FOUR SEASONS 35694 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

12 Radiator Hose parts for the 1989 Geo Spectrum come from 4 brands — GATES, DAYCO, ACDELCO and 1 other brand. The "Popular" part is DAYCO 81051. Every part fits both the 1.5L L4 and the 1.5L L4 Turbocharged.

The Economy section: 6 options from GATES, CONTINENTAL, DAYCO and 1 other brand. DAYCO 81051 is listed in this group.

Standard Replacement: 6 parts, from ACDELCO, DAYCO and GATES. A representative part number is ACDELCO 31610.

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

16 Temperature Sender / Sensor parts are listed for the 1989 Geo Spectrum, from STANDARD MOTOR PRODUCTS, FACET, SKP and 6 other brands. SKP SKTX18 carries the "Popular" badge. 14 parts fit every engine; the other 2 are engine-specific.

Economy: 5 parts, from SKP, STANDARD MOTOR PRODUCTS and UNITED MOTOR PRODUCTS. A representative part number is SKP SKTX18.

The Standard Replacement section: 10 options from FACET, STANDARD MOTOR PRODUCTS, HELLA and 3 other brands. STANDARD MOTOR PRODUCTS TX18 is listed in this group.

1 ungrouped part is not assigned to a grade, with the same engine-level match.

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

29 Thermostat parts for the 1989 Geo Spectrum come from 5 brands — MOTORAD, CALORSTAT, GATES and 2 other brands. The "Popular" part is MOTORAD 300160. Grades run from Economy through Standard Replacement; Standard Replacement is the most populated section, led by CALORSTAT, MOTORAD, BECK/ARNLEY and 2 other brands.

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

8 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 1989 Geo Spectrum, from MAHLE / CLEVITE, GATES, APEX and 4 other brands. GATES 33644 carries the "Popular" badge. All of them fit every engine offered in the 1989 Spectrum.

Listed part numbers: GATES 33644, MAHLE / CLEVITE C31759 and APEX AWO2032, plus the other parts above.

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 for the 1989 Geo Spectrum come from 5 brands — FVP, BECK/ARNLEY, US MOTOR WORKS and 2 other brands. The "Popular" part is GMB 1401300. 5 parts fit every engine; the other 1 is engine-specific.

The Economy section: 3 options from BECK/ARNLEY, FVP and US MOTOR WORKS. BECK/ARNLEY 1312000 is listed in this group.

Standard Replacement: 3 parts, from GMB, DAYCO and FVP. A representative part number is GMB 1401300.

Part numbers include GMB 1401300, BECK/ARNLEY 1312000 and FVP US5031, among others listed above.