1998 Buick Skylark 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

15 Coolant / Antifreeze parts for the 1998 Buick Skylark come from 6 brands — PRESTONE, PEAK, FVP and 3 other brands. The "Popular" part is FVP MV5050GAL. Every part fits both the 2.4L L4 and the 3.1L V6.

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, PRESTONE, VALVOLINE, ACDELCO and 2 other brands supply 6 parts: built to original-equipment specification. A representative part number is VALVOLINE ZXEL1.

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

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

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

8 Coolant Hose / Pipe parts for the 1998 Buick Skylark come from 5 brands — GATES, DAYCO, GM GENUINE and 2 other brands. The "Popular" part is ACDELCO 14156S.

This group includes ACDELCO 14156S, GATES 19026 and CONTINENTAL 63121 and the remaining 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

One part is listed for the 1998 Buick Skylark — 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

5 Coolant Level Sensor parts for the 1998 Buick Skylark come from 5 brands — STANDARD MOTOR PRODUCTS, FAMOUS BRAND, GPD and 2 other brands. The "Popular" part is STANDARD MOTOR PRODUCTS FLS16. 4 parts fit every engine; the other 1 is engine-specific.

Listed part numbers: STANDARD MOTOR PRODUCTS FLS16, FAMOUS BRAND SBA3711 and GPD 1712535, plus the other parts above.

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

3 Coolant Reservoir parts are listed for the 1998 Buick Skylark, from DORMAN, GPD and SKP. All of them fit every engine offered in the 1998 Skylark.

Listed part numbers: DORMAN 603115, GPD 2411025 and SKP SK603115.

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 1998 Buick Skylark, from AUTOTECNICA, CALORSTAT and MOTORAD. All of them fit every engine offered in the 1998 Skylark.

This group includes AUTOTECNICA GM0715997, CALORSTAT RC0159 and MOTORAD T39.

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 Skylark. All of them fit every engine offered in the 1998 Skylark.

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

4 Cooling System Tester Adapter parts for the 1998 Buick Skylark come from 2 brands — GATES and MOTORAD. Every part fits both the 2.4L L4 and the 3.1L V6.

This group includes GATES 31379, GATES 31410 and MOTORAD 3132 and the remaining parts above.

This table covers the Hose clamps. Read more

2 Hose Clamp parts for the 1998 Buick Skylark come from GM GENUINE. 1 part fits every engine; the other 1 is engine-specific.

This group includes GM GENUINE 11570616 and GM GENUINE 11517127.

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

10 Radiator parts for the 1998 Buick Skylark come from 8 brands — GPD, LILAND GLOBAL, FAMOUS BRAND and 5 other brands. The "Popular" part is FAMOUS BRAND 432391. 7 parts fit every engine; the other 3 are engine-specific.

The Economy section: 3 options from GPD and FAMOUS BRAND. FAMOUS BRAND 432391 is listed in this group.

The Premium (All Aluminum Construction) section lists 2 options from LILAND GLOBAL — a step above OE specification in materials, tolerances or warranty terms. LILAND GLOBAL 1515AA is listed in this group.

Standard Replacement: 5 parts, from SPECTRA PREMIUM, AGILITY, FVP and 2 other brands. A representative part number is SPECTRA PREMIUM CU1515.

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

2 Radiator Cap parts for the 1998 Buick Skylark come from 2 brands — ACDELCO and GATES. Every part fits both the 2.4L L4 and the 3.1L V6.

This group includes ACDELCO RC87 and GATES 31405.

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

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

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 Skylark, from UAC, DORMAN, GPD and 4 other brands. DORMAN 620627 carries the "Popular" badge. 3 parts fit every engine; the other 5 are engine-specific.

Economy: 3 parts, from DORMAN, GPD and ULTRA-POWER. A representative part number is DORMAN 620627.

The Standard Replacement section: 5 options from UAC, AGILITY, FOUR SEASONS and 1 other brand. AGILITY 6031103 is listed in this group.

Listed part numbers: DORMAN 620627 and GPD 2811467, 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

3 Radiator Fan Motor parts for the 1998 Buick Skylark come from 3 brands — FOUR SEASONS, GPD and VDO / CONTINENTAL. Every part fits both the 2.4L L4 and the 3.1L V6.

Part numbers include FOUR SEASONS 35377, GPD 2311448 and VDO / CONTINENTAL PM9040.

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

18 Radiator Hose parts are listed for the 1998 Buick Skylark, from DAYCO, GATES, ACDELCO and 1 other brand. DAYCO 81051 carries the "Popular" badge.

Economy: 4 parts, from DAYCO, GATES, ACDELCO and 1 other brand. A representative part number is DAYCO 81051.

The Standard Replacement section: 8 options from DAYCO, ACDELCO, GATES and 1 other brand. DAYCO 71695 is listed in this group.

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

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

DORMAN supplies both parts for the 1998 Buick Skylark. All of them fit every engine offered in the 1998 Skylark.

Listed part numbers: DORMAN 700579 and DORMAN 961359.

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 for the 1998 Buick Skylark come from 17 brands — STANDARD MOTOR PRODUCTS, NTK, WALKER PRODUCTS and 14 other brands. The "Popular" part is NTK EF0008. 21 parts fit every engine; the other 1 is engine-specific.

The Economy section: 8 options from NTK, STANDARD MOTOR PRODUCTS, GPD and 5 other brands. NTK EF0008 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 21191012 is listed in this group.

Standard Replacement: 13 parts, from STANDARD MOTOR PRODUCTS, WELLS, ACDELCO and 8 other brands. A representative part number is ACDELCO 1551107.

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

27 Thermostat parts are listed for the 1998 Buick Skylark, from MOTORAD, CALORSTAT, STANT and 3 other brands. MOTORAD 7474180 carries the "Popular" badge. Grades run from Heavy Duty through Standard Replacement; Standard Replacement is the most populated section, led by MOTORAD, CALORSTAT, GATES and 3 other brands.

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 Skylark come from 7 brands — FEL-PRO, MAHLE / CLEVITE, APEX and 4 other brands. The "Popular" part is FEL-PRO 35614. 5 parts fit every engine; the other 8 are engine-specific.

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

11 Thermostat Housing / Water Outlet parts are listed for the 1998 Buick Skylark, from DORMAN, GPD, MOTORAD and 4 other brands. DORMAN 902105 carries the "Popular" badge.

Economy: 6 parts, from DORMAN, GPD, FAMOUS BRAND and 1 other brand. A representative part number is DORMAN 902105.

The Standard Replacement section: 5 options from MOTORAD, FOUR SEASONS and GATES. MOTORAD CH5166 is listed in this group.

This table covers the Thermostat Housing / Water Outlet plugs. Typical signs include a leak at the drain or glow-plug hole, or a plug that has rounded off. Replace the crush washer and torque to the spec in the notes. Read more

One part is listed for the 1998 Buick Skylark — GM GENUINE 93439312.

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

17 Water Pump parts are listed for the 1998 Buick Skylark, from FVP, SKP, US MOTOR WORKS and 7 other brands. ACDELCO 252721 carries the "Popular" badge.

Economy: 8 parts, from FVP, SKP, US MOTOR WORKS and 1 other brand. A representative part number is FVP US5076.

The Standard Replacement section: 9 options from GATES, GMB, DAYCO and 3 other brands. ACDELCO 252721 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 Skylark come from 5 brands — FEL-PRO, APEX, MAHLE / CLEVITE and 2 other brands. The "Popular" part is FEL-PRO 35403.

Listed part numbers: FEL-PRO 35403, APEX AWP3234 and APEX AWP3010, plus the other parts above.

This table covers the Water Pump Inlet tubes. Read more

One part is listed for the 1998 Buick Skylark — SKP SK626112.

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

This group shows a single part: DORMAN 300933.

This table covers the Water Pump Stud kits. Read more

One part is listed for the 1998 Buick Skylark — DORMAN 902806.