1990 Buick Century 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 Buick Century, from PEAK, PRESTONE, FVP and 1 other brand. FVP MV5050GAL carries the "Popular" badge. All of them fit every engine offered in the 1990 Century.

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 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, PRESTONE 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 1990 Buick Century — CONTINENTAL 4371.

This table covers the Coolant Level sensors. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors. Read more

5 Coolant Level Sensor parts are listed for the 1990 Buick Century, from HOLSTEIN, WALKER PRODUCTS and STANDARD MOTOR PRODUCTS. 1 part fits every engine; the other 4 are engine-specific.

Economy: 1 part, from HOLSTEIN. A representative part number is HOLSTEIN 2CTS0221.

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 21192002.

3 ungrouped parts are not assigned to a grade, with the same engine-level match.

Part numbers include HOLSTEIN 2CTS0221 and WALKER PRODUCTS 21192002, among others listed above.

This table covers the caps on the overflow / expansion tank. 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

3 Coolant Reservoir Cap parts for the 1990 Buick Century come from 2 brands — DORMAN and MOTORAD. Every part fits both the 2.5L 151cid L4 and the 3.1L 189cid V6.

Listed part numbers: DORMAN 82590, DORMAN 54217 and MOTORAD T31.

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

3 Cooling System Tester Adapter parts are listed for the 1990 Buick Century, from ACDELCO, GATES and MOTORAD. 2 parts fit every engine; the other 1 is engine-specific.

Listed part numbers: ACDELCO 12A01, GATES 31413 and MOTORAD 3003.

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

6 Radiator parts are listed for the 1990 Buick Century, from FAMOUS BRAND, LILAND GLOBAL, AGILITY and 3 other brands. FAMOUS BRAND 433738 carries the "Popular" badge.

Economy: 1 part, from FAMOUS BRAND. A representative part number is FAMOUS BRAND 433738.

In the Premium (All Aluminum Construction) grade, LILAND GLOBAL supplies 1 part: a step above OE specification in materials, tolerances or warranty terms. A representative part number is LILAND GLOBAL 1054AA.

The Standard Replacement section: 3 options from AGILITY, FVP and OSC. AGILITY 8010738 is listed in this group.

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

Listed part numbers: FAMOUS BRAND 433738, LILAND GLOBAL 1054AA and AGILITY 8010738, 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

8 Radiator Cap parts are listed for the 1990 Buick Century, from CALORSTAT, GATES, MOTORAD and 2 other brands. ACDELCO RC27 carries the "Popular" badge. 5 parts fit every engine; the other 3 are engine-specific.

The Locking Replacement section lists 4 options from CALORSTAT, GATES and MOTORAD — grouped under the catalog's "Locking Replacement" designation — the notes column spells out what sets them apart. CALORSTAT RC0214 is listed in this group.

The Standard Replacement section: 4 options from ACDELCO, GATES, MOTORAD and 1 other brand. ACDELCO RC27 is listed in this group.

Part numbers include ACDELCO RC27, CALORSTAT RC0214 and CALORSTAT RC0217, among others listed above.

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

This group shows a single part: UAC FA50210C.

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 are listed for the 1990 Buick Century, from VDO / CONTINENTAL, FOUR SEASONS and TYC. 2 parts fit every engine; the other 2 are engine-specific.

This group includes FOUR SEASONS 35656, TYC 630070 and VDO / CONTINENTAL PM517 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

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

The Economy section: 8 options from DAYCO, GATES, ACDELCO and 1 other brand. DAYCO 81051 is listed in this group.

Standard Replacement: 6 parts, from DAYCO, GATES, ACDELCO and 1 other brand. A representative part number is GATES 21361.

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

23 Temperature Sender / Sensor parts are listed for the 1990 Buick Century, from WELLS, STANDARD MOTOR PRODUCTS, NTK and 10 other brands. NTK EF0008 carries the "Popular" badge. 12 parts fit every engine; the other 11 are engine-specific.

Economy: 6 parts, from NTK, STANDARD MOTOR PRODUCTS, HOLSTEIN and 3 other brands. A representative part number is NTK EF0008.

The Standard Replacement section: 17 options from WELLS, STANDARD MOTOR PRODUCTS, ACDELCO and 6 other brands. ACDELCO 1551107 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

34 Thermostat parts for the 1990 Buick Century come from 5 brands — MOTORAD, GATES, CALORSTAT and 2 other brands. The "Popular" part is MOTORAD 300180. Grades run from Economy through Standard Replacement; Standard Replacement is the most populated section, led by MOTORAD, GATES, CALORSTAT 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

11 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 1990 Buick Century, from MAHLE / CLEVITE, FEL-PRO, GATES and 3 other brands. FEL-PRO 35062 carries the "Popular" badge.

This table covers the housings and outlets the thermostat sits in. Read more

4 Thermostat Housing / Water Outlet parts for the 1990 Buick Century come from 3 brands — MOTORAD, DORMAN and FOUR SEASONS.

The Economy section: 1 option from DORMAN. DORMAN 9022041 is listed in this group.

Standard Replacement: 2 parts, from FOUR SEASONS and MOTORAD. A representative part number is FOUR SEASONS 84902.

1 further part sits outside the graded sections, with the same engine-level match.

Listed part numbers: DORMAN 9022041, FOUR SEASONS 84902 and MOTORAD CH3041, 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

9 Water Pump parts for the 1990 Buick Century come from 6 brands — FVP, US MOTOR WORKS, GMB and 3 other brands. The "Popular" part is CARDONE 58330.

The Economy section: 5 options from US MOTOR WORKS, CARDONE, FVP and 1 other brand. CARDONE 58330 is listed in this group.

Standard Replacement: 4 parts, from GMB, DAYCO and FVP. A representative part number is DAYCO DP1044.

Listed part numbers: CARDONE 58330, FVP US5033 and US MOTOR WORKS US5041, plus the other 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 1990 Buick Century, from APEX, FEL-PRO and VICTOR REINZ.

This group includes APEX AWP3090, APEX AWP3214 and FEL-PRO 35413 and the remaining parts above.

This table covers the Water Pump Inlet tubes. Read more

4 Water Pump Inlet Tube parts for the 1990 Buick Century come from 3 brands — CONTINENTAL, ACDELCO and GATES.

The Economy section: 1 option from CONTINENTAL. CONTINENTAL 50277 is listed in this group.

In the Universal Hose (Straight, Bulk) grade, ACDELCO and GATES supply 2 parts: grouped under the catalog's "Universal Hose (Straight, Bulk)" designation — the notes column spells out what sets them apart. A representative part number is ACDELCO 30125.

1 further part sits outside the graded sections, with the same engine-level match.

This group includes CONTINENTAL 50277, ACDELCO 30125 and GATES 28412 and the remaining parts above.

This table covers the Water Pump pulleys. Typical signs include a growl or chirp that follows engine speed, or a pulley that will not spin freely by hand. Spin each pulley with the belt off. Roughness or play means replace it with the belt. Read more

One part is listed for the 1990 Buick Century — DORMAN 300932.