2008 Cadillac CTS 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 are listed for the 2008 Cadillac CTS, from PRESTONE, PEAK, VALVOLINE and 3 other brands. FVP MV5050GAL carries the "Popular" badge.

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, PEAK, PRESTONE 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 7 options from VALVOLINE, PRESTONE, ACDELCO and 2 other brands — built to original-equipment specification. ACDELCO 105027 is listed in this group.

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

GM GENUINE supplies both parts for the 2008 Cadillac CTS.

This group includes GM GENUINE 12633398 and GM GENUINE 25800336.

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

2 Coolant Hose / Pipe Seal parts for the 2008 Cadillac CTS come from 2 brands — ELRING and GM GENUINE.

This group includes ELRING 943630 and GM GENUINE 12623519.

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

This group shows a single part: ELRING 943020.

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

This group shows a single part: AJUSA 01154600.

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

2 Coolant Reservoir parts for the 2008 Cadillac CTS come from TECHPRO.

This group includes TECHPRO GM3014154 and TECHPRO GM3014155.

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 2008 Cadillac CTS come from 3 brands — AUTOTECNICA, GM GENUINE and MOTORAD.

Listed part numbers: AUTOTECNICA GM0613026, GM GENUINE 15076936 and MOTORAD T46.

This table covers the seals at the Coolant Reservoir. 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 2008 Cadillac CTS — GM GENUINE 12623461.

This table covers the Cooling Fan control modules. Read more

2 Cooling Fan Control Module parts for the 2008 Cadillac CTS come from US MOTOR WORKS.

Part numbers include 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 are listed for the 2008 Cadillac CTS, from GATES and MOTORAD.

Listed part numbers: GATES 31431, GATES 31391 and MOTORAD 3128, plus the other 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

11 Radiator parts are listed for the 2008 Cadillac CTS, from GPD, DENSO, KOYORAD and 8 other brands. DENSO 2219239 carries the "Popular" badge.

Economy: 1 part, from GPD. A representative part number is GPD 13108C.

The Standard Replacement section: 10 options from DENSO, KOYORAD, TYC and 7 other brands. DENSO 2219239 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

2 Radiator Cap parts are listed for the 2008 Cadillac CTS, from ACDELCO and GATES.

This group includes ACDELCO RC116 and GATES 31532.

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 2008 Cadillac CTS come from 5 brands — UAC, GPD, TECHPRO and 2 other brands. The "Popular" part is TYC 622530.

The Economy section: 2 options from GPD and TECHPRO. GPD 2811692 is listed in this group.

Standard Replacement: 4 parts, from UAC, TYC and VDO / CONTINENTAL. A representative part number is TYC 622530.

This group includes TYC 622530, GPD 2811692 and TECHPRO GM3115223 and the remaining parts 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

7 Radiator Hose parts for the 2008 Cadillac CTS come from 3 brands — ACDELCO, DAYCO and GATES. The "Popular" part is DAYCO 72650.

This group includes DAYCO 72650, GATES 23277 and ACDELCO 26578X and the remaining parts 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

17 Temperature Sender / Sensor parts are listed for the 2008 Cadillac CTS, from STANDARD MOTOR PRODUCTS, NTK, GPD and 12 other brands. BOSCH 0280130122 carries the "Popular" badge.

Economy: 5 parts, from GPD, HOLSTEIN, ULTRA-POWER and 2 other brands. A representative part number is GPD 1712489.

The Standard Replacement section: 12 options from STANDARD MOTOR PRODUCTS, NTK, BOSCH and 7 other brands. BOSCH 0280130122 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

3 Thermostat parts for the 2008 Cadillac CTS come from 2 brands — MOTORAD and FOUR SEASONS.

Part numbers include FOUR SEASONS 86202, MOTORAD 735180 and MOTORAD 1013180.

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

27 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 2008 Cadillac CTS, from FEL-PRO, GM GENUINE, MAHLE / CLEVITE and 4 other brands. FEL-PRO 35858 carries the "Popular" badge. The notes list position, dimensions and spec qualifiers wherever the manufacturer distinguishes between variants.

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

This group shows a single part: ACDELCO 12706566.

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 for the 2008 Cadillac CTS come from 15 brands — GM GENUINE, BECK/ARNLEY, SKP and 12 other brands. The "Popular" part is BECK/ARNLEY 1312378.

The Economy section: 8 options from BECK/ARNLEY, SKP, CARTER and 5 other brands. BECK/ARNLEY 1312378 is listed in this group.

Standard Replacement: 9 parts, from GM GENUINE, GATES, ACDELCO and 4 other brands. A representative part number is GATES 43530.

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

6 Water Pump Gasket parts are listed for the 2008 Cadillac CTS, from FEL-PRO, GM GENUINE, APEX and 3 other brands. FEL-PRO 35859 carries the "Popular" badge.

Listed part numbers: FEL-PRO 35859, GM GENUINE 2512052 and APEX AWP3231, plus the other parts 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

One part is listed for the 2008 Cadillac CTS — 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

This group shows a single part: GM GENUINE 12691259.