1991 Geo Tracker 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

19 Coolant / Antifreeze parts are listed for the 1991 Geo Tracker, from PEAK, PRESTONE, FVP and 2 other brands. 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 2 options from VALVOLINE and PRESTONE — 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 8 options from PEAK, FVP, AISIN and 1 other brand — 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 1991 Geo Tracker — CONTINENTAL 64421.

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

3 Coolant Hose / Pipe Seal parts for the 1991 Geo Tracker come from 3 brands — AJUSA, APEX and FEL-PRO.

Part numbers include AJUSA 16020200, APEX AWO2387 and FEL-PRO 36102.

This table covers the Cooling Fan control modules. Read more

3 Cooling Fan Control Module parts for the 1991 Geo Tracker come from US MOTOR WORKS.

Part numbers include 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

5 Cooling System Tester Adapter parts are listed for the 1991 Geo Tracker, from MOTORAD, GATES and STANT. MOTORAD 3121 carries the "Popular" badge.

This group includes MOTORAD 3121, GATES 31428 and GATES 31409 and the remaining parts above.

This table covers the Hose clamps. Read more

One part is listed for the 1991 Geo Tracker — GM GENUINE 12338017.

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

9 Radiator parts are listed for the 1991 Geo Tracker, from AGILITY, FVP, OSC and 3 other brands.

Economy: 2 parts, from GPD and TECHPRO. A representative part number is GPD 1118C.

The Standard Replacement section: 7 options from AGILITY, FVP, OSC and 1 other brand. AGILITY 8011118 is listed in this group.

This group includes GPD 1118C, TECHPRO SZ3010111 and AGILITY 8011118 and the remaining 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

8 Radiator Cap parts are listed for the 1991 Geo Tracker, from GATES, MOTORAD, SKP and 1 other brand. GATES 31412 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 RC0213 is listed in this group.

The Standard Replacement section: 5 options from GATES, SKP and MOTORAD. GATES 31412 is listed in this group.

This group includes GATES 31412, CALORSTAT RC0213 and GATES 31533 and the remaining 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 clutches. Typical signs include slip at highway speed, chatter on takeoff, or a pedal that stays low. Resurface or replace the flywheel with the clutch — a heat-checked flywheel wastes the new disc. Read more

8 Radiator Fan Clutch parts are listed for the 1991 Geo Tracker, from AISIN, US MOTOR WORKS, ACDELCO and 5 other brands. AISIN FCS002 carries the "Popular" badge.

Part numbers include AISIN FCS002, US MOTOR WORKS 22068 and ACDELCO 1540066, 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

14 Radiator Hose parts for the 1991 Geo Tracker come from 4 brands — CONTINENTAL, GATES, ACDELCO and 1 other brand. The "Popular" part is ACDELCO 20157S.

The Economy section: 2 options from CONTINENTAL and GATES. CONTINENTAL 52016 is listed in this group.

Standard Replacement: 12 parts, from ACDELCO, GATES, CONTINENTAL and 1 other brand. A representative part number is ACDELCO 20157S.

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

22 Temperature Sender / Sensor parts are listed for the 1991 Geo Tracker, from ULTRA-POWER, WALKER PRODUCTS, STANDARD MOTOR PRODUCTS and 13 other brands. ÜRO PARTS 13621284397 carries the "Popular" badge.

Economy: 6 parts, from ULTRA-POWER, ÜRO PARTS, GPD and 2 other brands. A representative part number is ÜRO PARTS 13621284397.

In the Full Service Kit grade, WALKER PRODUCTS supplies 1 part: grouped under the catalog's "Full Service Kit" designation — the notes column spells out what sets them apart. A representative part number is WALKER PRODUCTS 21191122.

The Standard Replacement section: 15 options from STANDARD MOTOR PRODUCTS, ACDELCO, BECK/ARNLEY and 8 other brands. FOUR SEASONS 36424 is listed in this group.

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

16 Thermostat parts for the 1991 Geo Tracker come from 8 brands — MOTORAD, BECK/ARNLEY, GATES and 5 other brands. The "Popular" part is BECK/ARNLEY 1430689.

The Performance section lists 2 options from MOTORAD — engineered beyond original-equipment specification. MOTORAD 2001160 is listed in this group.

Premium: 1 part, from MOTORAD. A representative part number is MOTORAD 7201180.

Standard Replacement: 13 parts, from BECK/ARNLEY, MOTORAD, GATES and 5 other brands. A representative part number is BECK/ARNLEY 1430689.

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

9 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 1991 Geo Tracker, from VICTOR REINZ, GATES, MOTORAD and 5 other brands. GATES 33644 carries the "Popular" badge.

This group includes GATES 33644, MOTORAD MG68 and AISIN THP601 and the remaining 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

9 Water Pump parts for the 1991 Geo Tracker come from 9 brands — BECK/ARNLEY, FVP, US MOTOR WORKS and 6 other brands. The "Popular" part is ACDELCO 252718.

The Economy section: 4 options from BECK/ARNLEY, FVP, US MOTOR WORKS and 1 other brand. BECK/ARNLEY 1312111 is listed in this group.

Standard Replacement: 5 parts, from ACDELCO, AISIN, GATES and 2 other brands. A representative part number is ACDELCO 252718.

This group includes ACDELCO 252718, BECK/ARNLEY 1312111 and FVP US5048 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 are listed for the 1991 Geo Tracker, from 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.