1991 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

17 Coolant / Antifreeze parts are listed for the 1991 Buick Regal, from PEAK, PRESTONE, FVP and 1 other brand. FVP MV5050GAL carries the "Popular" badge. All of them fit every engine offered in the 1991 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, 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 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

4 Coolant Hose / Pipe parts are listed for the 1991 Buick Regal, from ACDELCO, CONTINENTAL, DAYCO and 1 other brand.

Listed part numbers: ACDELCO 14108S, CONTINENTAL 64288 and DAYCO 71624, 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

8 Coolant Level Sensor parts are listed for the 1991 Buick Regal, from GPD, HOLSTEIN, ULTRA-POWER and 4 other brands. GPD 1712532 carries the "Popular" badge. 3 parts fit every engine; the other 5 are engine-specific.

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.

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

Part numbers include GPD 1712532, HOLSTEIN 2CTS0221 and ULTRA-POWER 5S1449, among others listed above.

This table covers the gaskets that seal the Coolant Pipe. 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

2 Coolant Pipe Gasket parts for the 1991 Buick Regal come from 2 brands — APEX and FEL-PRO.

Part numbers include APEX AWO2036 and FEL-PRO 35571.

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

4 Coolant Reservoir Cap parts for the 1991 Buick Regal come from 3 brands — DORMAN, MOTORAD and SKP. 1 part fits every engine; the other 3 are engine-specific.

Listed part numbers: DORMAN 82601, DORMAN 54217 and MOTORAD T174, plus the other parts above.

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

DORMAN supplies both parts for the 1991 Buick Regal.

The U-Nut section lists 1 option from DORMAN — grouped under the catalog's "U-Nut" designation — the notes column spells out what sets them apart. DORMAN 961304 is listed in this group.

The U-Nut (Wide Panel) section lists 1 option from DORMAN — grouped under the catalog's "U-Nut (Wide Panel)" designation — the notes column spells out what sets them apart. DORMAN 45406 is listed in this group.

Listed part numbers: DORMAN 961304 and DORMAN 45406.

This table covers the Cooling Fan control modules. Read more

3 Cooling Fan Control Module parts for the 1991 Buick Regal come from US MOTOR WORKS. Every part fits both the 3.1L V6 and the 3.8L V6.

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 1991 Buick Regal, from ACDELCO, GATES and MOTORAD. All of them fit every engine offered in the 1991 Regal.

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

This table covers the Hose clamps. Read more

GM GENUINE supplies the 5 Hose Clamp parts for the 1991 Buick Regal.

The Stainless Steel (Standard) section lists 2 options from GM GENUINE — grouped under the catalog's "Stainless Steel (Standard)" designation — the notes column spells out what sets them apart. GM GENUINE 11610236 is listed in this group.

The Standard Replacement section: 1 option from GM GENUINE. GM GENUINE 11570383 is listed in this group.

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

This group includes GM GENUINE 11610236, GM GENUINE 12338017 and GM GENUINE 11570383 and the remaining parts above.

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

13 Radiator parts are listed for the 1991 Buick Regal, from AGILITY, OSC, FVP and 4 other brands. ULTRA-POWER 658 carries the "Popular" badge.

Economy: 2 parts, from ULTRA-POWER and GPD. A representative part number is ULTRA-POWER 658.

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 1206AA.

The Standard Replacement section: 5 options from AGILITY, OSC and FVP. AGILITY 8011206 is listed in this group.

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

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 Buick Regal, from CALORSTAT, GATES, MOTORAD and 2 other brands. ACDELCO RC27 carries the "Popular" badge. All of them fit every engine offered in the 1991 Regal.

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.

This group includes ACDELCO RC27, CALORSTAT RC0214 and CALORSTAT RC0217 and the remaining parts above.

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

This group shows a single part: DORMAN 490232.

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

6 Radiator Fan Assembly parts for the 1991 Buick Regal come from 5 brands — TECHPRO, DORMAN, GPD and 2 other brands. The "Popular" part is DORMAN 620632. 2 parts fit every engine; the other 4 are engine-specific.

The Economy section: 4 options from TECHPRO, DORMAN and GPD. DORMAN 620632 is listed in this group.

Standard Replacement: 2 parts, from UAC and VDO / CONTINENTAL. A representative part number is UAC FA50092C.

Part numbers include DORMAN 620632, GPD 2811309 and TECHPRO GM3115174, 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

11 Radiator Fan Motor parts are listed for the 1991 Buick Regal, from FOUR SEASONS, VDO / CONTINENTAL, GPD and 2 other brands. FOUR SEASONS 35656 carries the "Popular" badge. 2 parts fit every engine; the other 9 are engine-specific.

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

20 Radiator Hose parts for the 1991 Buick Regal come from 4 brands — GATES, ACDELCO, CONTINENTAL and 1 other brand. The "Popular" part is GATES 25255. 2 parts fit every engine; the other 18 are engine-specific.

The Economy section: 5 options from GATES, ACDELCO and CONTINENTAL. GATES 25255 is listed in this group.

Standard Replacement: 15 parts, from ACDELCO, DAYCO, GATES and 1 other brand. A representative part number is ACDELCO 24194L.

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

27 Temperature Sender / Sensor parts are listed for the 1991 Buick Regal, from STANDARD MOTOR PRODUCTS, WELLS, NTK and 12 other brands. NTK EF0008 carries the "Popular" badge. They are grouped as Economy and Standard Replacement, with Standard Replacement the largest group at 17 parts from STANDARD MOTOR PRODUCTS, WELLS, ACDELCO and 6 other brands.

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

26 Thermostat parts for the 1991 Buick Regal come from 3 brands — MOTORAD, GATES and GM GENUINE. The "Popular" part is GATES 33329. They are grouped as Heavy Duty, Performance, Premium and Standard Replacement, with Standard Replacement the largest group at 12 parts from MOTORAD, GATES and GM GENUINE.

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

24 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 1991 Buick Regal, from MAHLE / CLEVITE, FEL-PRO, GATES and 6 other brands. FEL-PRO 35614 carries the "Popular" badge.

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

8 Thermostat Housing / Water Outlet parts for the 1991 Buick Regal come from 5 brands — DORMAN, FOUR SEASONS, MOTORAD and 2 other brands. The "Popular" part is FOUR SEASONS 85105. 1 part fits every engine; the other 7 are engine-specific.

The Economy section: 4 options from DORMAN, FAMOUS BRAND and GPD. DORMAN 9022027 is listed in this group.

Standard Replacement: 4 parts, from FOUR SEASONS and MOTORAD. A representative part number is FOUR SEASONS 85105.

This group includes FOUR SEASONS 85105, DORMAN 9022027 and DORMAN 9022053 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

18 Water Pump parts for the 1991 Buick Regal come from 9 brands — WJB / INMOTION PARTS, FVP, SKP and 6 other brands. The "Popular" part is ACDELCO 252721.

The Economy section: 9 options from WJB / INMOTION PARTS, FVP, SKP and 1 other brand. FVP US5033 is listed in this group.

Standard Replacement: 9 parts, from ACDELCO, GATES, DAYCO and 2 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

9 Water Pump Gasket parts are listed for the 1991 Buick Regal, from FEL-PRO, APEX, MAHLE / CLEVITE and 2 other brands. FEL-PRO 35403 carries the "Popular" badge.

This group includes FEL-PRO 35403, APEX AWP3010 and APEX AWP3003 and the remaining parts above.

This table covers the Water Pump Inlet tubes. Read more

9 Water Pump Inlet Tube parts for the 1991 Buick Regal come from 4 brands — CONTINENTAL, ACDELCO, DAYCO and 1 other brand. The "Popular" part is CONTINENTAL 63726.

Part numbers include CONTINENTAL 63726, ACDELCO 16199M and ACDELCO 14183S, among others listed 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

DORMAN supplies both parts for the 1991 Buick Regal.

Listed part numbers: DORMAN 300933 and DORMAN 300934.