2004 Buick Rainier 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 for the 2004 Buick Rainier come from 6 brands — PRESTONE, PEAK, VALVOLINE and 3 other brands. The "Popular" part is FVP MV5050GAL. Every part fits both the 4.2L L6 and the 5.3L V8.

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 Heavy Duty grade, PRESTONE supplies 1 part: rated for severe service. A representative part number is PRESTONE AFC12100.

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 Coolant Air Bleed Hose pipes. Read more

2 Coolant Air Bleed Hose / Pipe parts for the 2004 Buick Rainier come from 2 brands — SKP and DORMAN.

The Economy section: 1 option from SKP. SKP SK626543 is listed in this group.

Standard Replacement: 1 part, from DORMAN. A representative part number is DORMAN 626543.

Part numbers include SKP SK626543 and DORMAN 626543.

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

This group shows a single part: PIONEER WPT810.

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

4 Coolant Hose / Pipe Seal parts are listed for the 2004 Buick Rainier, from ELRING, DORMAN and FEL-PRO.

Listed part numbers: DORMAN 56390, ELRING 876190 and ELRING 868630, plus the other parts above.

This table covers the seals at the Coolant Hose Connector / Flange. 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

ELRING supplies both parts for the 2004 Buick Rainier.

This group includes ELRING 851630 and ELRING 200060.

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

2 Coolant Level Sensor parts for the 2004 Buick Rainier come from 2 brands — STANDARD MOTOR PRODUCTS and WALKER PRODUCTS. Every part fits both the 4.2L L6 and the 5.3L V8.

Listed part numbers: STANDARD MOTOR PRODUCTS FLS16 and WALKER PRODUCTS 2111045.

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

4 Coolant Reservoir parts are listed for the 2004 Buick Rainier, from DORMAN, GM GENUINE, GPD and 1 other brand. 3 parts fit every engine; the other 1 is engine-specific.

Part numbers include DORMAN 603126, GM GENUINE 89022552 and GPD 2411029, among others listed 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 are listed for the 2004 Buick Rainier, from CALORSTAT, GM GENUINE and MOTORAD. All of them fit every engine offered in the 2004 Rainier.

Part numbers include CALORSTAT RC0147, GM GENUINE RC122 and MOTORAD T80.

This table covers the Coolant Water Crossover Mounting sets. Read more

3 Coolant Water Crossover Mounting Set parts for the 2004 Buick Rainier come from 3 brands — FEL-PRO, MAHLE / CLEVITE and VICTOR REINZ.

This group includes FEL-PRO ES73027, MAHLE / CLEVITE GS33845 and VICTOR REINZ 181002301.

This table covers the Cooling Fan control modules. Read more

US MOTOR WORKS supplies the 4 Cooling Fan Control Module parts for the 2004 Buick Rainier. 2 parts fit every engine; the other 2 are engine-specific.

This group includes US MOTOR WORKS 16749, US MOTOR WORKS 16779 and US MOTOR WORKS 16795 and the remaining parts above.

This table covers the adapters used to pressure-test this cooling system. Read more

4 Cooling System Tester Adapter parts for the 2004 Buick Rainier come from 2 brands — GATES and MOTORAD. Every part fits both the 4.2L L6 and the 5.3L V8.

This group includes GATES 31431, GATES 31391 and MOTORAD 3128 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

20 Radiator parts for the 2004 Buick Rainier come from 10 brands — OSC, CSF, KOYORAD and 7 other brands. The "Popular" part is CSF 3107.

The Economy section: 1 option from OSC. OSC 2458E is listed in this group.

Standard Replacement: 10 parts, from CSF, KOYORAD, TYC and 7 other brands. A representative part number is CSF 3107.

9 further parts sit outside the graded sections, 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

3 Radiator Cap parts for the 2004 Buick Rainier come from 3 brands — ACDELCO, GATES and MOTORAD. Every part fits both the 4.2L L6 and the 5.3L V8.

This group includes ACDELCO RC85, GATES 31532 and MOTORAD T46.

This table covers the Radiator Fan blades. Typical signs include chatter, streaks, or a skip at the top of the stroke. Confirm left and right lengths in the notes — they are often different. Read more

4 Radiator Fan Blade parts are listed for the 2004 Buick Rainier, from FOUR SEASONS, GM GENUINE, SKP and 1 other brand. All of them fit every engine offered in the 2004 Rainier.

Listed part numbers: FOUR SEASONS 76029, GM GENUINE 1580696 and SKP SK620619, plus the other parts above.

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

11 Radiator Fan Clutch parts for the 2004 Buick Rainier come from 11 brands — BECK/ARNLEY, HAYDEN, ULTRA-POWER and 8 other brands. The "Popular" part is BECK/ARNLEY 1300229. 10 parts fit every engine; the other 1 is engine-specific.

This table covers the shrouds that duct air through the fan and radiator. Read more

This group shows a single part: VARIOUS MFR GM3110151.

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

16 Radiator Hose parts are listed for the 2004 Buick Rainier, from ACDELCO, DAYCO, GATES and 1 other brand. ACDELCO 20382S carries the "Popular" badge.

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 for the 2004 Buick Rainier come from 16 brands — STANDARD MOTOR PRODUCTS, WALKER PRODUCTS, GPD and 13 other brands. The "Popular" part is SKP SKTX89. Grades run from Economy through Standard Replacement; Standard Replacement is the most populated section, led by STANDARD MOTOR PRODUCTS, WALKER PRODUCTS, FOUR SEASONS and 9 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

35 Thermostat parts are listed for the 2004 Buick Rainier, from MOTORAD, DORMAN, CALORSTAT and 7 other brands. MOTORAD 5456187 carries the "Popular" badge. Economy, Heavy Duty, Performance, Premium and Standard Replacement are all represented, and Standard Replacement alone accounts for 23 parts.

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 2004 Buick Rainier come from 6 brands — MAHLE / CLEVITE, VICTOR REINZ, FEL-PRO and 3 other brands. The "Popular" part is FEL-PRO 35632. 1 part fits every engine; the other 12 are engine-specific.

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

12 Thermostat Housing / Water Outlet parts are listed for the 2004 Buick Rainier, from DORMAN, GPD, MOTORAD and 5 other brands. DORMAN 902116 carries the "Popular" badge.

Economy: 6 parts, from DORMAN, GPD, AUTOTECNICA and 1 other brand. A representative part number is DORMAN 902116.

The Standard Replacement section: 6 options from MOTORAD, FOUR SEASONS, GM GENUINE and 1 other brand. GM GENUINE 12620112 is listed in this group.

This table covers the gaskets that seal the Water Inlet. 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

This group shows a single part: GM GENUINE 131169.

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

27 Water Pump parts are listed for the 2004 Buick Rainier, from SKP, US MOTOR WORKS, FVP and 10 other brands. SKP SK1307700 carries the "Popular" badge. Economy and Standard Replacement are all represented, and Standard Replacement alone accounts for 15 parts.

This table covers the Water Pump & Fan Clutch assemblies. Read more

7 Water Pump & Fan Clutch Assembly parts are listed for the 2004 Buick Rainier, from US MOTOR WORKS, FVP and GMB.

Listed part numbers: FVP 1300004 and FVP 1300028, plus the other parts above.

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

17 Water Pump Gasket parts for the 2004 Buick Rainier come from 8 brands — FEL-PRO, ELRING, VICTOR REINZ and 5 other brands. The "Popular" part is FEL-PRO 35704.

This table covers the Water Pump Seal O-rings. Typical signs include a seep at a fitting or a housing that weeps after a service. Lube the new O-ring with the fluid it will see, and do not roll it into the groove. Read more

4 Water Pump Seal / O-Ring parts are listed for the 2004 Buick Rainier, from APEX, FEL-PRO, MAHLE / CLEVITE and 1 other brand.

This group includes APEX AWP3151, FEL-PRO 35633 and MAHLE / CLEVITE K31629 and the remaining parts above.