1991 Geo Metro 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 for the 1991 Geo Metro 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, PEAK, PRESTONE 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 7 parts: built to original-equipment specification. A representative part number is FVP DEX5050GAL.

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

2 Coolant Hose / Pipe parts for the 1991 Geo Metro come from 2 brands — ACDELCO and GATES.

Listed part numbers: ACDELCO 14067S and GATES 18429.

This table covers the seals at the Coolant Hose / Pipe. 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

2 Coolant Hose / Pipe Seal parts are listed for the 1991 Geo Metro, from AJUSA and FEL-PRO.

This group includes AJUSA 16020200 and FEL-PRO 36102.

This table covers the Cooling Fan control modules. Read more

US MOTOR WORKS supplies the 3 Cooling Fan Control Module parts for the 1991 Geo Metro.

This group includes 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 for the 1991 Geo Metro come from 3 brands — 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 for the 1991 Geo Metro come from 5 brands — TECHPRO, SPECTRA PREMIUM, FVP and 2 other brands. The "Popular" part is LILAND GLOBAL 1182AA.

The Economy section: 2 options from TECHPRO. TECHPRO GM3010371 is listed in this group.

The Premium (All Aluminum Construction) section lists 1 option from LILAND GLOBAL — a step above OE specification in materials, tolerances or warranty terms. LILAND GLOBAL 1182AA is listed in this group.

Standard Replacement: 5 parts, from SPECTRA PREMIUM, FVP and OSC. A representative part number is SPECTRA PREMIUM CU1444.

Listed part numbers: LILAND GLOBAL 1182AA, TECHPRO GM3010371 and TECHPRO GM3010372, plus the other parts 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

6 Radiator Cap parts for the 1991 Geo Metro come from 4 brands — GATES, MOTORAD, CALORSTAT and 1 other brand. The "Popular" part is MOTORAD T13R.

In the Locking Replacement grade, CALORSTAT, GATES and MOTORAD 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 CALORSTAT RC0213.

Standard Replacement: 3 parts, from MOTORAD, SKP and GATES. A representative part number is MOTORAD T13R.

Part numbers include MOTORAD T13R, CALORSTAT RC0213 and GATES 31533, among others listed above.

This table covers the petcocks used to drain the radiator. Read more

One part is listed for the 1991 Geo Metro — DORMAN 490235.

This table covers the fan assemblies (and clutches, where listed) that pull air through the radiator. Read more

2 Radiator Fan Assembly parts are listed for the 1991 Geo Metro, from GPD and AGILITY.

Economy: 1 part, from GPD. A representative part number is GPD 2811296.

The Standard Replacement section: 1 option from AGILITY. AGILITY 6016148 is listed in this group.

Listed part numbers: GPD 2811296 and AGILITY 6016148.

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

4 Radiator Fan Motor parts for the 1991 Geo Metro come from 4 brands — ACDELCO, FOUR SEASONS, GPD and 1 other brand.

This group includes ACDELCO 1580408, FOUR SEASONS 35407 and GPD 2311272 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

9 Radiator Hose parts are listed for the 1991 Geo Metro, from GATES, DAYCO, ACDELCO and 1 other brand. DAYCO 71271 carries the "Popular" badge.

Economy: 1 part, from GATES. A representative part number is GATES 25157.

The Standard Replacement section: 8 options from GATES, DAYCO, ACDELCO and 1 other brand. DAYCO 71271 is listed in this group.

Part numbers include DAYCO 71271, GATES 25157 and DAYCO 70894, among others listed 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

19 Temperature Sender / Sensor parts for the 1991 Geo Metro come from 13 brands — STANDARD MOTOR PRODUCTS, WALKER PRODUCTS, BECK/ARNLEY and 10 other brands. The "Popular" part is SKP SKTX18.

The Economy section: 6 options from SKP, STANDARD MOTOR PRODUCTS, ÜRO PARTS and 3 other brands. SKP SKTX18 is listed in this group.

The Full Service Kit section lists 1 option from WALKER PRODUCTS — grouped under the catalog's "Full Service Kit" designation — the notes column spells out what sets them apart. WALKER PRODUCTS 21191122 is listed in this group.

Standard Replacement: 12 parts, from STANDARD MOTOR PRODUCTS, BECK/ARNLEY, FACET and 5 other brands. A representative part number is STANDARD MOTOR PRODUCTS TX18.

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

12 Thermostat parts are listed for the 1991 Geo Metro, from MOTORAD, GATES, BECK/ARNLEY and 1 other brand. GATES 33429 carries the "Popular" badge.

The Heavy Duty section: 1 option from MOTORAD. MOTORAD 5203180 is listed in this group.

In the Performance grade, MOTORAD supplies 1 part: engineered beyond original-equipment specification. A representative part number is MOTORAD 2003180.

The Premium section: 2 options from MOTORAD. MOTORAD 7203180 is listed in this group.

The Standard Replacement section: 8 options from MOTORAD, GATES, BECK/ARNLEY and 1 other brand. GATES 33429 is listed in this group.

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

11 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 1991 Geo Metro come from 9 brands — APEX, VICTOR REINZ, FEL-PRO and 6 other brands. The "Popular" part is FEL-PRO 35451.

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

7 Water Pump parts are listed for the 1991 Geo Metro, from WJB / INMOTION PARTS, BECK/ARNLEY, FVP and 4 other brands. WJB / INMOTION PARTS WU5058 carries the "Popular" badge.

Economy: 4 parts, from WJB / INMOTION PARTS, BECK/ARNLEY, FVP and 1 other brand. A representative part number is WJB / INMOTION PARTS WU5058.

The Standard Replacement section: 3 options from AISIN, GATES and GMB. AISIN WPS007 is listed in this group.

This group includes WJB / INMOTION PARTS WU5058, BECK/ARNLEY 1312147 and FVP US5058 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

4 Water Pump Gasket parts for the 1991 Geo Metro come from 4 brands — APEX, BECK/ARNLEY, FEL-PRO and 1 other brand.

Listed part numbers: APEX AWP3070, BECK/ARNLEY 0394043 and FEL-PRO 35366, plus the other parts above.