2004 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 are listed for the 2004 Buick Regal, from PRESTONE, PEAK, VALVOLINE and 3 other brands. FVP MV5050GAL carries the "Popular" badge. All of them fit every engine offered in the 2004 Regal.

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

3 Coolant Hose / Pipe parts are listed for the 2004 Buick Regal, from GM GENUINE and CONTINENTAL. All of them fit every engine offered in the 2004 Regal.

Listed part numbers: CONTINENTAL 63043, GM GENUINE 12565082 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 for the 2004 Buick Regal come from 3 brands — GM GENUINE, FEL-PRO and MAHLE / CLEVITE. The "Popular" part is GM GENUINE 1534066. 4 parts fit every engine; the other 1 is engine-specific.

Part numbers include GM GENUINE 1534066, FEL-PRO 36021 and GM GENUINE 24502846, among others listed above.

This table covers the Coolant Hose Connector flanges. Read more

One part is listed for the 2004 Buick Regal — FOUR SEASONS 86500.

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

5 Coolant Reservoir parts for the 2004 Buick Regal come from 5 brands — DORMAN, GM GENUINE, GPD and 2 other brands. The "Popular" part is DORMAN 603033. Every part fits both the 3.8L V6 and the 3.8L V6 Supercharged.

This group includes DORMAN 603033, GM GENUINE 10333858 and GPD 2411209 and the remaining parts 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

2 Coolant Reservoir Cap parts for the 2004 Buick Regal come from 2 brands — DORMAN and MOTORAD. Every part fits both the 3.8L V6 and the 3.8L V6 Supercharged.

Listed part numbers: DORMAN 82724 and MOTORAD T167.

This table covers the Coolant Reservoir retainers and clips. Read more

One part is listed for the 2004 Buick Regal — GM GENUINE 10427340.

This table covers the Cooling Fan control modules. Read more

3 Cooling Fan Control Module parts for the 2004 Buick Regal come from US MOTOR WORKS. Every part fits both the 3.8L V6 and the 3.8L V6 Supercharged.

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

3 Cooling System Tester Adapter parts are listed for the 2004 Buick Regal, from ACDELCO, GATES and MOTORAD. All of them fit every engine offered in the 2004 Regal.

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

14 Radiator parts are listed for the 2004 Buick Regal, from SPECTRA PREMIUM, TYC, AGILITY and 5 other brands. KOYORAD A2343 carries the "Popular" badge. 2 parts fit every engine; the other 12 are engine-specific.

Economy: 1 part, from FAMOUS BRAND. A representative part number is FAMOUS BRAND 432302.

The Standard Replacement section: 13 options from SPECTRA PREMIUM, TYC, AGILITY and 4 other brands. KOYORAD A2343 is listed in this group.

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 are listed for the 2004 Buick Regal, from MOTORAD, GATES, ACDELCO and 1 other brand. MOTORAD ST16V carries the "Popular" badge. All of them fit every engine offered in the 2004 Regal.

The Locking Replacement section lists 2 options from MOTORAD and GATES — grouped under the catalog's "Locking Replacement" designation — the notes column spells out what sets them apart. MOTORAD ST16V is listed in this group.

The Standard Replacement section: 4 options from GATES, ACDELCO, MOTORAD and 1 other brand. GATES 31523 is listed in this group.

This group includes MOTORAD ST16V, GATES 31516 and GATES 31523 and the remaining parts above.

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

This group shows a single part: DORMAN 61136.

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

5 Radiator Fan Assembly parts for the 2004 Buick Regal come from 4 brands — UAC, DORMAN, FOUR SEASONS and 1 other brand. The "Popular" part is DORMAN 620613. Every part fits both the 3.8L V6 and the 3.8L V6 Supercharged.

The Economy section: 1 option from DORMAN. DORMAN 620613 is listed in this group.

Standard Replacement: 4 parts, from UAC, FOUR SEASONS and VDO / CONTINENTAL. A representative part number is FOUR SEASONS 75259.

Part numbers include DORMAN 620613, FOUR SEASONS 75259 and UAC FA50310C, 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 2004 Buick Regal, from FOUR SEASONS, VDO / CONTINENTAL and TYC. FOUR SEASONS 35656 carries the "Popular" badge. All of them fit every engine offered in the 2004 Regal.

This group includes FOUR SEASONS 35656, FOUR SEASONS 35389 and TYC 630070 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

8 Radiator Hose parts for the 2004 Buick Regal come from 4 brands — GATES, ACDELCO, CONTINENTAL and 1 other brand. The "Popular" part is GATES 22344. Every part fits both the 3.8L V6 and the 3.8L V6 Supercharged.

Part numbers include GATES 22344, GATES 22373 and ACDELCO 26346X, among others listed above.

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 Shroud Trim retainers and clips. Read more

One part is listed for the 2004 Buick Regal — 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

22 Temperature Sender / Sensor parts are listed for the 2004 Buick Regal, from STANDARD MOTOR PRODUCTS, NTK, WALKER PRODUCTS and 14 other brands. NTK EF0008 carries the "Popular" badge. All of them fit every engine offered in the 2004 Regal.

Economy: 8 parts, from NTK, STANDARD MOTOR PRODUCTS, GPD and 5 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 21191012.

The Standard Replacement section: 13 options from STANDARD MOTOR PRODUCTS, WELLS, ACDELCO and 8 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

12 Thermostat parts for the 2004 Buick Regal come from 5 brands — MOTORAD, GATES, GM GENUINE and 2 other brands. The "Popular" part is MOTORAD 5239192. Every part fits both the 3.8L V6 and the 3.8L V6 Supercharged.

In the Heavy Duty grade, MOTORAD supplies 2 parts: rated for severe service. A representative part number is MOTORAD 5239192.

Premium: 3 parts, from MOTORAD. A representative part number is MOTORAD 7239192.

Standard Replacement: 7 parts, from MOTORAD, GATES, GM GENUINE and 2 other brands. A representative part number is GATES 33429.

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

10 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 2004 Buick Regal, from MAHLE / CLEVITE, MOTORAD, VICTOR REINZ and 4 other brands. FEL-PRO 35666 carries the "Popular" badge. 8 parts fit every engine; the other 2 are engine-specific.

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

4 Thermostat Housing / Water Outlet parts for the 2004 Buick Regal come from 4 brands — DORMAN, GPD, FOUR SEASONS and 1 other brand. Every part fits both the 3.8L V6 and the 3.8L V6 Supercharged.

The Economy section: 2 options from DORMAN and GPD. DORMAN 9022001 is listed in this group.

Standard Replacement: 2 parts, from FOUR SEASONS and MOTORAD. A representative part number is FOUR SEASONS 85167.

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 for the 2004 Buick Regal come from 10 brands — DAYCO, US MOTOR WORKS, FVP and 7 other brands. The "Popular" part is US MOTOR WORKS US5075. Every part fits both the 3.8L V6 and the 3.8L V6 Supercharged.

The Economy section: 4 options from US MOTOR WORKS, FVP, SKP and 1 other brand. US MOTOR WORKS US5075 is listed in this group.

Standard Replacement: 7 parts, from DAYCO, ACDELCO, GMB and 3 other brands. A representative part number is ACDELCO 252693.

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 are listed for the 2004 Buick Regal, from FEL-PRO, APEX, MAHLE / CLEVITE and 2 other brands. FEL-PRO 35351 carries the "Popular" badge. All of them fit every engine offered in the 2004 Regal.

This group includes FEL-PRO 35351, FEL-PRO 35804 and APEX AWP3003 and the remaining parts above.