1998 Buick Regal 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 for the 1998 Buick Regal come from 6 brands — PRESTONE, PEAK, VALVOLINE and 3 other brands. The "Popular" part is FVP MV5050GAL. Every part fits both the 3.8L V6 and the 3.8L V6 Supercharged.

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 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, VALVOLINE, PRESTONE, ACDELCO and 2 other brands supply 7 parts: built to original-equipment specification. A representative part number is ACDELCO 105027.

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

One part is listed for the 1998 Buick Regal — DORMAN 902112.

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

2 Coolant Hose / Pipe parts for the 1998 Buick Regal come from 2 brands — CONTINENTAL and GM GENUINE. Every part fits both the 3.8L V6 and the 3.8L V6 Supercharged.

This group includes CONTINENTAL 63043 and GM GENUINE 24503423.

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

5 Coolant Hose / Pipe Seal parts are listed for the 1998 Buick Regal, from GM GENUINE, FEL-PRO and MAHLE / CLEVITE. GM GENUINE 1534066 carries the "Popular" badge. 4 parts fit every engine; the other 1 is engine-specific.

Listed part numbers: GM GENUINE 1534066, FEL-PRO 36021 and GM GENUINE 24502846, plus the other parts above.

This table covers the Coolant Hose Connector flanges. Read more

This group shows a single part: FOUR SEASONS 86500.

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 for the 1998 Buick Regal come from 7 brands — HOLSTEIN, GPD, ULTRA-POWER and 4 other brands. The "Popular" part is GPD 1712532. Every part fits both the 3.8L V6 and the 3.8L V6 Supercharged.

The Economy section: 1 option from HOLSTEIN. HOLSTEIN 2CTS0221 is listed in this group.

Standard Replacement: 1 part, from GPD. A representative part number is GPD 1712532.

5 further parts sit outside the graded sections, with the same engine-level match.

This group includes GPD 1712532, HOLSTEIN 2CTS0221 and ULTRA-POWER 5S1449 and the remaining parts above.

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

One part is listed for the 1998 Buick Regal — 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

One part is listed for the 1998 Buick Regal — DORMAN 54217.

This table covers the Cooling Fan control modules. Read more

US MOTOR WORKS supplies the 3 Cooling Fan Control Module parts for the 1998 Buick Regal. All of them fit every engine offered in the 1998 Regal.

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

3 Cooling System Tester Adapter parts for the 1998 Buick Regal come from 3 brands — ACDELCO, GATES and MOTORAD. Every part fits both the 3.8L V6 and the 3.8L V6 Supercharged.

This group includes 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

16 Radiator parts for the 1998 Buick Regal come from 9 brands — GPD, TYC, AGILITY and 6 other brands. The "Popular" part is KOYORAD A1889. 4 parts fit every engine; the other 12 are engine-specific.

The Economy section: 2 options from GPD. GPD 1890C is listed in this group.

Standard Replacement: 14 parts, from TYC, AGILITY, FVP and 5 other brands. A representative part number is KOYORAD A1889.

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

9 Radiator Cap parts for the 1998 Buick Regal come from 5 brands — CALORSTAT, GATES, MOTORAD and 2 other brands. The "Popular" part is ACDELCO RC27. Every part fits both the 3.8L V6 and the 3.8L V6 Supercharged.

In the Locking Replacement grade, CALORSTAT, GATES and MOTORAD supply 4 parts: grouped under the catalog's "Locking Replacement" designation — the notes column spells out what sets them apart. A representative part number is CALORSTAT RC0214.

Standard Replacement: 5 parts, from ACDELCO, GATES, CALORSTAT and 2 other brands. A representative part number is ACDELCO RC27.

Listed part numbers: ACDELCO RC27, CALORSTAT RC0214 and CALORSTAT RC0217, plus the other parts above.

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

2 Radiator Drain Petcock parts are listed for the 1998 Buick Regal, from DORMAN and GM GENUINE. All of them fit every engine offered in the 1998 Regal.

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 are listed for the 1998 Buick Regal, from TECHPRO, VDO / CONTINENTAL, UAC and 2 other brands. AGILITY 6031104 carries the "Popular" badge. All of them fit every engine offered in the 1998 Regal.

Economy: 3 parts, from TECHPRO and GPD. A representative part number is GPD 2811270.

The Standard Replacement section: 5 options from VDO / CONTINENTAL, UAC and AGILITY. AGILITY 6031104 is listed in this group.

Listed part numbers: AGILITY 6031104, GPD 2811270 and TECHPRO GM3115118, plus the other parts 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 for the 1998 Buick Regal come from 4 brands — VDO / CONTINENTAL, TYC, FOUR SEASONS and 1 other brand. The "Popular" part is TYC 630070. Every part fits both the 3.8L V6 and the 3.8L V6 Supercharged.

Listed part numbers: TYC 630070, FOUR SEASONS 35102 and GPD 2312105, plus the other 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

8 Radiator Hose parts are listed for the 1998 Buick Regal, from GATES, ACDELCO, CONTINENTAL and 1 other brand. GATES 22344 carries the "Popular" badge. All of them fit every engine offered in the 1998 Regal.

Listed part numbers: GATES 22344, GATES 22373 and ACDELCO 26346X, plus the other parts above.

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

One part is listed for the 1998 Buick Regal — DORMAN 45814.

This table covers the Shroud Trim retainers and clips. Read more

This group shows a single part: DORMAN 961364.

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

14 Temperature Sender / Sensor parts for the 1998 Buick Regal come from 11 brands — UNITED MOTOR PRODUCTS, STANDARD MOTOR PRODUCTS, WALKER PRODUCTS and 8 other brands. The "Popular" part is UNITED MOTOR PRODUCTS CTS3.

The Economy section: 4 options from UNITED MOTOR PRODUCTS, HOLSTEIN and STANDARD MOTOR PRODUCTS. UNITED MOTOR PRODUCTS CTS3 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 21191039 is listed in this group.

Standard Replacement: 9 parts, from FOUR SEASONS, GM GENUINE, BECK/ARNLEY and 6 other brands. A representative part number is FOUR SEASONS 36445.

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 1998 Buick Regal, from MOTORAD, GATES, GM GENUINE and 2 other brands. MOTORAD 5239192 carries the "Popular" badge.

The Heavy Duty section lists 2 options from MOTORAD — rated for severe service. MOTORAD 5239192 is listed in this group.

The Premium section: 3 options from MOTORAD. MOTORAD 7239192 is listed in this group.

The Standard Replacement section: 7 options from MOTORAD, GATES, GM GENUINE and 2 other brands. 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

13 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 1998 Buick Regal come from 7 brands — VICTOR REINZ, FEL-PRO, MAHLE / CLEVITE and 4 other brands. The "Popular" part is FEL-PRO 35666.

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

4 Thermostat Housing / Water Outlet parts are listed for the 1998 Buick Regal, from DORMAN, GPD, FOUR SEASONS and 1 other brand.

Economy: 2 parts, from DORMAN and GPD. A representative part number is DORMAN 9022001.

The Standard Replacement section: 2 options from FOUR SEASONS and MOTORAD. FOUR SEASONS 85167 is listed in this group.

Listed part numbers: DORMAN 9022001, GPD 8241409 and FOUR SEASONS 85167, 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

11 Water Pump parts are listed for the 1998 Buick Regal, from DAYCO, US MOTOR WORKS, FVP and 7 other brands. US MOTOR WORKS US5075 carries the "Popular" badge.

Economy: 4 parts, from US MOTOR WORKS, FVP, SKP and 1 other brand. A representative part number is US MOTOR WORKS US5075.

The Standard Replacement section: 7 options from DAYCO, ACDELCO, GMB and 3 other brands. ACDELCO 252693 is listed in this group.

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

9 Water Pump Gasket parts for the 1998 Buick Regal come from 5 brands — FEL-PRO, APEX, MAHLE / CLEVITE and 2 other brands. The "Popular" part is FEL-PRO 35351.

Listed part numbers: FEL-PRO 35351, FEL-PRO 35804 and APEX AWP3003, plus the other parts above.