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

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

4 Coolant Hose / Pipe parts are listed for the 1990 Buick Lesabre, from CONTINENTAL, DAYCO and GATES.

This group includes CONTINENTAL 63033, CONTINENTAL 50277 and DAYCO 71376 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

3 Coolant Reservoir Cap parts for the 1990 Buick Lesabre come from 2 brands — DORMAN and MOTORAD. 2 parts fit every engine; the other 1 is engine-specific.

This group includes DORMAN 54217, DORMAN 82590 and MOTORAD T31.

This table covers the Cooling Fan control modules. Read more

3 Cooling Fan Control Module parts for the 1990 Buick Lesabre come from US MOTOR WORKS. Every part fits both the 3.8L 231cid V6 and the 5.0L 307cid V8.

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 1990 Buick Lesabre, from ACDELCO, GATES and MOTORAD. All of them fit every engine offered in the 1990 Lesabre.

Part numbers include ACDELCO 12A01, GATES 31413 and MOTORAD 3003.

This table covers the Hose clamps. Read more

One part is listed for the 1990 Buick Lesabre — GM GENUINE 12338017.

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

21 Radiator parts are listed for the 1990 Buick Lesabre, from LILAND GLOBAL, AGILITY, OSC and 5 other brands. LILAND GLOBAL 161AA2R carries the "Popular" badge. 2 parts fit every engine; the other 19 are engine-specific.

Economy: 1 part, from GPD. A representative part number is GPD 921C.

In the Premium (All Aluminum Construction) grade, LILAND GLOBAL supplies 4 parts: a step above OE specification in materials, tolerances or warranty terms. A representative part number is LILAND GLOBAL 161AA2R.

The Standard Replacement section: 16 options from AGILITY, OSC, SPECTRA PREMIUM and 3 other brands. AGILITY 8010161 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

8 Radiator Cap parts are listed for the 1990 Buick Lesabre, from CALORSTAT, GATES, MOTORAD and 2 other brands. ACDELCO RC27 carries the "Popular" badge. All of them fit every engine offered in the 1990 Lesabre.

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.

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 for the 1990 Buick Lesabre come from DORMAN. Every part fits both the 3.8L 231cid V6 and the 5.0L 307cid V8.

Listed part numbers: DORMAN 490232 and DORMAN 43177.

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 clutches. Typical signs include slip at highway speed, chatter on takeoff, or a pedal that stays low. Resurface or replace the flywheel with the clutch — a heat-checked flywheel wastes the new disc. Read more

24 Radiator Fan Clutch parts are listed for the 1990 Buick Lesabre, from HAYDEN, FOUR SEASONS, GMB and 5 other brands. ACDELCO 1580244 carries the "Popular" badge. 1 part fits every engine; the other 23 are engine-specific.

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

6 Radiator Fan Motor parts are listed for the 1990 Buick Lesabre, from VDO / CONTINENTAL, FOUR SEASONS and GPD. FOUR SEASONS 35656 carries the "Popular" badge. 1 part fits every engine; the other 5 are engine-specific.

Part numbers include FOUR SEASONS 35656, FOUR SEASONS 35694 and GPD 2311317, among others listed 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

25 Radiator Hose parts for the 1990 Buick Lesabre come from 4 brands — GATES, ACDELCO, DAYCO and 1 other brand. The "Popular" part is ACDELCO 31639.

The Economy section: 10 options from GATES, ACDELCO, DAYCO and 1 other brand. ACDELCO 31639 is listed in this group.

Standard Replacement: 15 parts, from DAYCO, GATES, CONTINENTAL and 1 other brand. A representative part number is ACDELCO 24094L.

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

25 Temperature Sender / Sensor parts are listed for the 1990 Buick Lesabre, from STANDARD MOTOR PRODUCTS, WELLS, NTK and 13 other brands. NTK EF0008 carries the "Popular" badge. 23 parts fit every engine; the other 2 are engine-specific.

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

The Standard Replacement section: 17 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

45 Thermostat parts for the 1990 Buick Lesabre come from 4 brands — MOTORAD, GATES, CALORSTAT and 1 other brand. The "Popular" part is MOTORAD 300180. Grades run from Economy through Standard Replacement; Standard Replacement is the most populated section, led by MOTORAD, CALORSTAT, GATES and 1 other brand.

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

15 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 1990 Buick Lesabre, from FEL-PRO, MAHLE / CLEVITE, MOTORAD and 5 other brands. FEL-PRO 35608 carries the "Popular" badge.

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

7 Thermostat Housing / Water Outlet parts for the 1990 Buick Lesabre come from 4 brands — GPD, FOUR SEASONS, MOTORAD and 1 other brand.

The Economy section: 3 options from GPD and DORMAN. DORMAN 9022025 is listed in this group.

Standard Replacement: 4 parts, from FOUR SEASONS and MOTORAD. A representative part number is FOUR SEASONS 84969.

Part numbers include DORMAN 9022025, GPD 8241351 and GPD 8241271, among others listed above.