1990 Geo Storm 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 1990 Geo Storm, 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, 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

One part is listed for the 1990 Geo Storm — CONTINENTAL 63032.

This table covers the Cooling Fan control modules. Read more

3 Cooling Fan Control Module parts for the 1990 Geo Storm come from US MOTOR WORKS.

Listed part numbers: US MOTOR WORKS 16749, US MOTOR WORKS 16789 and US MOTOR WORKS 16795.

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

4 Cooling System Tester Adapter parts are listed for the 1990 Geo Storm, from MOTORAD, GATES and STANT.

Listed part numbers: GATES 31428, MOTORAD 3121 and MOTORAD 3122, plus the other 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

8 Radiator parts are listed for the 1990 Geo Storm, from TECHPRO, ULTRA-POWER, GPD and 4 other brands. ULTRA-POWER 1117 carries the "Popular" badge.

Economy: 4 parts, from TECHPRO, ULTRA-POWER and GPD. A representative part number is ULTRA-POWER 1117.

The Standard Replacement section: 4 options from AGILITY, FVP, KOYORAD and 1 other brand. AGILITY 8011117 is listed in this group.

Part numbers include ULTRA-POWER 1117, GPD 1117C and TECHPRO GM3010380, among others listed above.

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 1990 Geo Storm, from GATES, MOTORAD, CALORSTAT and 2 other brands. MOTORAD T16R carries the "Popular" badge.

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: 4 options from MOTORAD, SKP, DORMAN and 1 other brand. 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 petcocks used to drain the radiator. Read more

This group shows a single part: DORMAN 490216.

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

6 Radiator Fan Motor parts are listed for the 1990 Geo Storm, from FOUR SEASONS, VDO / CONTINENTAL and ACDELCO. FOUR SEASONS 35407 carries the "Popular" badge.

Part numbers include FOUR SEASONS 35407, VDO / CONTINENTAL PM3777 and ACDELCO 1580408, 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

10 Radiator Hose parts for the 1990 Geo Storm come from 4 brands — DAYCO, GATES, ACDELCO and 1 other brand. The "Popular" part is DAYCO 81051.

The Economy section: 5 options from CONTINENTAL, DAYCO, ACDELCO and 1 other brand. DAYCO 81051 is listed in this group.

Standard Replacement: 5 parts, from GATES, DAYCO and ACDELCO. A representative part number is GATES 21508.

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

28 Temperature Sender / Sensor parts are listed for the 1990 Geo Storm, from STANDARD MOTOR PRODUCTS, SKP, WELLS and 13 other brands. NTK EF0008 carries the "Popular" badge. Grades run from Economy through Standard Replacement; Standard Replacement is the most populated section, led by STANDARD MOTOR PRODUCTS, WELLS, BECK/ARNLEY and 8 other brands.

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 1990 Geo Storm come from 5 brands — MOTORAD, CALORSTAT, GATES and 2 other brands. The "Popular" part is MOTORAD 300160. Economy, Heavy Duty, Performance, Premium and Standard Replacement are all represented, and Standard Replacement alone accounts for 17 parts.

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

12 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 1990 Geo Storm, from MAHLE / CLEVITE, APEX, FEL-PRO and 5 other brands. GATES 33644 carries the "Popular" badge.

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 1990 Geo Storm come from 5 brands — US MOTOR WORKS, WJB / INMOTION PARTS, DAYCO and 2 other brands. The "Popular" part is US MOTOR WORKS US9220.

The Economy section: 3 options from US MOTOR WORKS and WJB / INMOTION PARTS. US MOTOR WORKS US9220 is listed in this group.

Standard Replacement: 3 parts, from DAYCO, GATES and GMB. A representative part number is DAYCO DP950.

This group includes US MOTOR WORKS US9220, US MOTOR WORKS US9221 and WJB / INMOTION PARTS WU9221 and the remaining parts above.

This table covers the gaskets between the water pump and the block or housing. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

2 Water Pump Gasket parts are listed for the 1990 Geo Storm, from APEX and VICTOR REINZ.

Listed part numbers: APEX AWP3101 and VICTOR REINZ 711596800.