2018 Cadillac Ats 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 for the 2018 Cadillac Ats come from 6 brands — PRESTONE, PEAK, VALVOLINE and 3 other brands. The "Popular" part is FVP MV5050GAL. Every part fits all 3 engine options (2.0L L4 Turbocharged, 3.6L V6 and 3.6L V6 Turbocharged).

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, 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

4 Coolant Air Bleed Hose / Pipe parts for the 2018 Cadillac Ats come from GM GENUINE.

Part numbers include GM GENUINE 12634280, GM GENUINE 12683453 and GM GENUINE 12653191, among others listed above.

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

13 Coolant Hose / Pipe parts for the 2018 Cadillac Ats come from 4 brands — GM GENUINE, ACDELCO, CONTINENTAL and 1 other brand. The "Popular" part is GM GENUINE 84890763.

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

7 Coolant Hose / Pipe Seal parts are listed for the 2018 Cadillac Ats, from GM GENUINE, ELRING, FEL-PRO and 1 other brand. GM GENUINE 12627055 carries the "Popular" badge. 1 part fits every engine; the other 6 are engine-specific.

Part numbers include GM GENUINE 12627055, ELRING 943630 and FEL-PRO 36156, among others listed above.

This table covers the Coolant Hose Connector flanges. Read more

2 Coolant Hose Connector / Flange parts for the 2018 Cadillac Ats come from 2 brands — FOUR SEASONS and GM GENUINE.

This group includes FOUR SEASONS 86373 and GM GENUINE 23333192.

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

One part is listed for the 2018 Cadillac Ats — ELRING 237180.

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

One part is listed for the 2018 Cadillac Ats — AJUSA 01154600.

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

2 Coolant Reservoir parts are listed for the 2018 Cadillac Ats, from GM GENUINE and GPD. All of them fit every engine offered in the 2018 Ats.

This group includes GM GENUINE 22948113 and GPD 2411335.

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

5 Coolant Reservoir Cap parts are listed for the 2018 Cadillac Ats, from MOTORAD, ACDELCO, AUTOTECNICA and 2 other brands. MOTORAD T62 carries the "Popular" badge. All of them fit every engine offered in the 2018 Ats.

This group includes MOTORAD T62, ACDELCO 12R05 and AUTOTECNICA GM0714619 and the remaining parts above.

This table covers the Coolant Reservoir clamps. Read more

This group shows a single part: GM GENUINE 90572587.

This table covers the Cooling Fan control modules. Read more

4 Cooling Fan Control Module parts are listed for the 2018 Cadillac Ats, from GM GENUINE, SHEE-MAR, STANDARD MOTOR PRODUCTS and 1 other brand. 3 parts fit every engine; the other 1 is engine-specific.

This group includes GM GENUINE 1581991, SHEE-MAR SM1270 and STANDARD MOTOR PRODUCTS RY1941 and the remaining parts above.

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

3 Cooling System Tester Adapter parts for the 2018 Cadillac Ats come from 2 brands — MOTORAD and GATES. Every part fits all 3 engine options (2.0L L4 Turbocharged, 3.6L V6 and 3.6L V6 Turbocharged).

Part numbers include GATES 31391, MOTORAD 3128 and MOTORAD 3127.

This table covers the Hose clamps. Read more

10 Hose Clamp parts for the 2018 Cadillac Ats come from GM GENUINE. The "Popular" part is GM GENUINE 90530642. 1 part fits every engine; the other 9 are engine-specific.

This table covers the intercoolers that cool turbo or supercharger charge air. Read more

11 Intercooler parts for the 2018 Cadillac Ats come from 6 brands — GM GENUINE, TECHPRO, GPD and 3 other brands. The "Popular" part is GM GENUINE 84510353.

The Economy section: 2 options from TECHPRO. TECHPRO GM3012125 is listed in this group.

Standard Replacement: 4 parts, from GM GENUINE. A representative part number is GM GENUINE 84510353.

5 further parts sit outside the graded sections, with the same engine-level match.

This table covers the Intercooler Air Hose pipes. Read more

7 Intercooler Air Hose / Pipe parts for the 2018 Cadillac Ats come from GM GENUINE.

Part numbers include GM GENUINE 22799479, GM GENUINE 22799478 and GM GENUINE 22799477, among others listed above.

This table covers the gaskets that seal the Intercooler. 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

One part is listed for the 2018 Cadillac Ats — ELRING B18110.

This table covers the brackets that mount the Intercooler Hose / Pipe. Typical signs include a cracked mount, a rattle, or a bracket that no longer holds alignment. Confirm position in the notes. Many brackets look alike and bolt to different corners. Read more

This group shows a single part: GM GENUINE 84399881.

This table covers the Intercooler Hose / Pipe clamps. Read more

One part is listed for the 2018 Cadillac Ats — GM GENUINE 13335193.

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 for the 2018 Cadillac Ats come from 8 brands — AGILITY, GM GENUINE, KOYORAD and 5 other brands. The "Popular" part is CSF 3904. 4 parts fit every engine; the other 10 are engine-specific.

The Economy section: 1 option from GPD. GPD 13784C is listed in this group.

Standard Replacement: 13 parts, from AGILITY, GM GENUINE, KOYORAD and 4 other brands. A representative part number is CSF 3904.

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 2018 Cadillac Ats come from ACDELCO. Every part fits all 3 engine options (2.0L L4 Turbocharged, 3.6L V6 and 3.6L V6 Turbocharged).

Listed part numbers: ACDELCO RC117 and ACDELCO RC115.

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

One part is listed for the 2018 Cadillac Ats — GM GENUINE 22887095.

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

10 Radiator Fan Assembly parts are listed for the 2018 Cadillac Ats, from GPD, GM GENUINE, DORMAN and 5 other brands. GM GENUINE 1581927 carries the "Popular" badge. 1 part fits every engine; the other 9 are engine-specific.

Economy: 5 parts, from GPD, DORMAN, TECHPRO and 1 other brand. A representative part number is DORMAN 621984.

The Standard Replacement section: 5 options from GM GENUINE, TYC, UAC and 1 other brand. GM GENUINE 1581927 is listed in this group.

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

17 Radiator Hose parts are listed for the 2018 Cadillac Ats, from GM GENUINE, ACDELCO, GATES and 1 other brand. ACDELCO 22815L carries the "Popular" badge.

This table covers the seals at the Radiator. 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

GM GENUINE supplies the 4 Radiator Seal parts for the 2018 Cadillac Ats.

Part numbers include GM GENUINE 23107669, GM GENUINE 23362367 and GM GENUINE 23107670, among others listed above.

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

5 Radiator Upper Air Baffle Retainer / Clip parts are listed for the 2018 Cadillac Ats, from DORMAN and GM GENUINE. 1 part fits every engine; the other 4 are engine-specific.

Part numbers include DORMAN 700365, DORMAN 963058 and DORMAN 961362, among others listed above.

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

10 Temperature Sender / Sensor parts for the 2018 Cadillac Ats come from 7 brands — GM GENUINE, STANDARD MOTOR PRODUCTS, WALKER PRODUCTS and 4 other brands. The "Popular" part is GM GENUINE 12650595.

The Economy section: 3 options from GPD, HOLSTEIN and VEMO. GPD 1712905 is listed in this group.

Standard Replacement: 7 parts, from GM GENUINE, STANDARD MOTOR PRODUCTS, WALKER PRODUCTS and 1 other brand. A representative part number is GM GENUINE 12650595.

This table covers the Temperature Sender / Sensor 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

This group shows a single part: GM GENUINE 12639042.

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

7 Thermostat parts are listed for the 2018 Cadillac Ats, from MOTORAD, AUTOTECNICA, DORMAN and 3 other brands. MOTORAD 959195 carries the "Popular" badge.

Economy: 3 parts, from AUTOTECNICA, DORMAN and SKP. A representative part number is AUTOTECNICA GM0720800.

The Standard Replacement section: 3 options from MOTORAD and FOUR SEASONS. MOTORAD 959195 is listed in this group.

1 ungrouped part is not assigned to a grade, with the same engine-level match.

Listed part numbers: MOTORAD 959195, AUTOTECNICA GM0720800 and DORMAN 9022123, plus the other parts above.

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

28 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 2018 Cadillac Ats come from 7 brands — GM GENUINE, FEL-PRO, APEX and 4 other brands. The "Popular" part is FEL-PRO 35855. A list this long means Thermostat / Thermostat Housing / Water Outlet Seal applications vary by configuration — the notes carry the qualifiers.

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

7 Thermostat Housing / Water Outlet parts are listed for the 2018 Cadillac Ats, from GM GENUINE, GATES, ACDELCO and 1 other brand. ACDELCO 1511109 carries the "Popular" badge.

This group includes ACDELCO 1511109, GATES CO35087 and GATES CO35104 and the remaining parts above.

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

3 Water Inlet Gasket parts for the 2018 Cadillac Ats come from 3 brands — FEL-PRO, GM GENUINE and MAHLE / CLEVITE.

Part numbers include FEL-PRO 36167, GM GENUINE 12647400 and MAHLE / CLEVITE C33508.

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

16 Water Pump parts are listed for the 2018 Cadillac Ats, from GM GENUINE, US MOTOR WORKS, FVP and 7 other brands. US MOTOR WORKS US8932 carries the "Popular" badge.

Economy: 6 parts, from US MOTOR WORKS, FVP, CARTER and 1 other brand. A representative part number is US MOTOR WORKS US8932.

The Standard Replacement section: 10 options from GM GENUINE, ACDELCO, GATES and 3 other brands. ACDELCO 2521038 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 2018 Cadillac Ats come from 5 brands — ELRING, GM GENUINE, FEL-PRO and 2 other brands. The "Popular" part is GM GENUINE 2512072.

Listed part numbers: GM GENUINE 2512072, APEX AWP3231 and ELRING 048370, plus the other parts above.

This table covers the Water Pump Inlet tubes. Read more

One part is listed for the 2018 Cadillac Ats — GM GENUINE 12706857.

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

2 Water Pump Pulley parts for the 2018 Cadillac Ats come from GM GENUINE.

Listed part numbers: GM GENUINE 12652047 and GM GENUINE 12611587.

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

GM GENUINE supplies the 4 Water Pump Seal / O-Ring parts for the 2018 Cadillac Ats.

Listed part numbers: GM GENUINE 12646951, GM GENUINE 12646952 and GM GENUINE 12649987, plus the other parts above.