1998 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

16 Coolant / Antifreeze parts are listed for the 1998 Buick Century, from PRESTONE, PEAK, VALVOLINE and 3 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 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 VALVOLINE, PRESTONE, ACDELCO and 2 other brands — built to original-equipment specification. ACDELCO 105027 is listed in this group.

This table covers the bleeders used to purge air from the coolant circuit. Read more

This group shows a single part: DORMAN 902112.

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

6 Coolant Hose / Pipe parts are listed for the 1998 Buick Century, from GM GENUINE, ACDELCO, GATES and 2 other brands. ACDELCO 14156S carries the "Popular" badge.

Listed part numbers: ACDELCO 14156S, GATES 19026 and CONTINENTAL 63121, plus the other parts above.

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

This group shows a single part: MAHLE / CLEVITE C31326.

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

7 Coolant Level Sensor parts are listed for the 1998 Buick Century, from HOLSTEIN, GPD, ULTRA-POWER and 4 other brands. GPD 1712532 carries the "Popular" badge.

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

The Standard Replacement section: 1 option from GPD. GPD 1712532 is listed in this group.

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

Listed part numbers: GPD 1712532, HOLSTEIN 2CTS0221 and ULTRA-POWER 5S1449, plus the other parts above.

This table covers the overflow / expansion tanks that hold extra coolant. Read more

This group shows a single part: TECHPRO GM3014112.

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

This group shows a single part: DORMAN 54217.

This table covers the Cooling Fan control modules. Read more

3 Cooling Fan Control Module parts for the 1998 Buick Century 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

3 Cooling System Tester Adapter parts are listed for the 1998 Buick Century, from ACDELCO, GATES and MOTORAD.

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

8 Radiator parts are listed for the 1998 Buick Century, from KOYORAD, TYC, AGILITY and 5 other brands. KOYORAD A1889 carries the "Popular" badge.

Part numbers include KOYORAD A1889, TYC 1889 and AGILITY 8011889, 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 1998 Buick Century, from GATES, MOTORAD, ACDELCO and 2 other brands. ACDELCO RC27 carries the "Popular" badge.

The Locking Replacement section lists 2 options from GATES and MOTORAD — grouped under the catalog's "Locking Replacement" designation — the notes column spells out what sets them apart. GATES 31516 is listed in this group.

The Standard Replacement section: 5 options from ACDELCO, GATES, CALORSTAT and 2 other brands. ACDELCO RC27 is listed in this group.

Part numbers include ACDELCO RC27, GATES 31516 and MOTORAD ST16V, among others listed above.

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

2 Radiator Drain Petcock parts for the 1998 Buick Century come from 2 brands — DORMAN and GM GENUINE.

Listed part numbers: DORMAN 61133 and GM GENUINE 88927326.

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

8 Radiator Fan Assembly parts for the 1998 Buick Century come from 6 brands — ULTRA-POWER, UAC, DORMAN and 3 other brands. The "Popular" part is DORMAN 620601.

The Economy section: 3 options from ULTRA-POWER and DORMAN. DORMAN 620601 is listed in this group.

Standard Replacement: 5 parts, from UAC, AGILITY, FOUR SEASONS and 1 other brand. A representative part number is AGILITY 6031104.

Part numbers include DORMAN 620601 and ULTRA-POWER 620604, among others listed 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 1998 Buick Century, from VDO / CONTINENTAL, TYC and GPD. TYC 630070 carries the "Popular" badge.

This group includes TYC 630070, GPD 2311415 and VDO / CONTINENTAL PM540 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

10 Radiator Hose parts for the 1998 Buick Century come from 4 brands — GATES, ACDELCO, DAYCO and 1 other brand. The "Popular" part is DAYCO 71850.

This table covers the Radiator Upper Air Baffle retainers and clips. Read more

This group shows a single part: DORMAN 45814.

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 1998 Buick Century, from STANDARD MOTOR PRODUCTS, WELLS, NTK and 12 other brands. NTK EF0008 carries the "Popular" badge.

Economy: 8 parts, from STANDARD MOTOR PRODUCTS, NTK, GPD and 4 other brands. A representative part number is NTK EF0008.

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 21191039.

The Standard Replacement section: 13 options from WELLS, STANDARD MOTOR PRODUCTS, ACDELCO and 7 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

19 Thermostat parts for the 1998 Buick Century come from 6 brands — MOTORAD, CALORSTAT, GM GENUINE and 3 other brands. The "Popular" part is GATES 33329.

In the Heavy Duty grade, MOTORAD supplies 2 parts: rated for severe service. A representative part number is MOTORAD 5267195.

The Performance section lists 2 options from MOTORAD — engineered beyond original-equipment specification. MOTORAD 2067180 is listed in this group.

Premium: 3 parts, from MOTORAD. A representative part number is MOTORAD 7267195.

Standard Replacement: 12 parts, from MOTORAD, CALORSTAT, GM GENUINE and 3 other brands. A representative part number is GATES 33329.

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 1998 Buick Century, from FEL-PRO, MAHLE / CLEVITE, GATES and 3 other brands. FEL-PRO 35614 carries the "Popular" badge.

Listed part numbers: FEL-PRO 35614, GATES 33611 and APEX AWO2041, plus the other parts above.

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

5 Thermostat Housing / Water Outlet parts for the 1998 Buick Century come from 5 brands — DORMAN, FAMOUS BRAND, GPD and 2 other brands. The "Popular" part is MOTORAD CH5166.

The Economy section: 3 options from DORMAN, FAMOUS BRAND and GPD. DORMAN 9022004 is listed in this group.

Standard Replacement: 2 parts, from MOTORAD and FOUR SEASONS. A representative part number is MOTORAD CH5166.

Listed part numbers: MOTORAD CH5166, DORMAN 9022004 and FAMOUS BRAND 85166, 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

10 Water Pump parts for the 1998 Buick Century come from 10 brands — FVP, SKP, US MOTOR WORKS and 7 other brands. The "Popular" part is ACDELCO 252721.

The Economy section: 4 options from FVP, SKP, US MOTOR WORKS and 1 other brand. FVP US5033 is listed in this group.

Standard Replacement: 6 parts, from ACDELCO, GATES, AISIN and 3 other brands. A representative part number is ACDELCO 252721.

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

5 Water Pump Gasket parts are listed for the 1998 Buick Century, from FEL-PRO, APEX, GM GENUINE and 2 other brands. FEL-PRO 35403 carries the "Popular" badge.

Listed part numbers: FEL-PRO 35403, APEX AWP3010 and GM GENUINE 2512018, plus the other 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 1998 Buick Century — DORMAN 300933.

This table covers the Water Pump Stud kits. Read more

This group shows a single part: DORMAN 902806.