2007 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 for the 2007 Cadillac CTS come from 6 brands — PRESTONE, PEAK, VALVOLINE and 3 other brands. The "Popular" part is FVP MV5050GAL. Every part fits all 3 engine options (2.8L V6, 3.6L V6 and 6.0L 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 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 2007 Cadillac CTS come from 2 brands — DORMAN and GATES.

Part numbers include DORMAN 626592 and GATES HHA146.

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

3 Coolant Hose / Pipe parts for the 2007 Cadillac CTS come from 3 brands — CONTINENTAL, DAYCO and GATES.

Listed part numbers: CONTINENTAL 61267, DAYCO 71709 and GATES 24527.

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

3 Coolant Hose / Pipe Seal parts are listed for the 2007 Cadillac CTS, from ELRING and GM GENUINE. 2 parts fit every engine; the other 1 is engine-specific.

This group includes ELRING 943630, ELRING 868630 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

One part is listed for the 2007 Cadillac CTS — 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

One part is listed for the 2007 Cadillac CTS — AJUSA 01154600.

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

7 Coolant Reservoir parts are listed for the 2007 Cadillac CTS, from TECHPRO, DORMAN, GPD and 1 other brand. DORMAN 603343 carries the "Popular" badge. All of them fit every engine offered in the 2007 CTS.

Listed part numbers: DORMAN 603343, GPD 2411384 and TECHPRO GM3014158, plus the other 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 are listed for the 2007 Cadillac CTS, from AUTOTECNICA, GM GENUINE and MOTORAD. All of them fit every engine offered in the 2007 CTS.

Part numbers include AUTOTECNICA GM0613026, GM GENUINE 15076936 and MOTORAD T46.

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

3 Coolant Water Crossover Mounting Set parts for the 2007 Cadillac CTS come from 3 brands — FEL-PRO, MAHLE / CLEVITE and VICTOR REINZ.

Listed part numbers: 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 3 Cooling Fan Control Module parts for the 2007 Cadillac CTS.

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

4 Cooling System Tester Adapter parts for the 2007 Cadillac CTS come from 2 brands — GATES and MOTORAD. Every part fits all 3 engine options (2.8L V6, 3.6L V6 and 6.0L 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

10 Radiator parts for the 2007 Cadillac CTS come from 10 brands — ULTRA-POWER, CSF, KOYORAD and 7 other brands. The "Popular" part is ULTRA-POWER 2731. 6 parts fit every engine; the other 4 are engine-specific.

The Economy section: 1 option from ULTRA-POWER. ULTRA-POWER 2731 is listed in this group.

Standard Replacement: 9 parts, from CSF, KOYORAD, SPECTRA PREMIUM and 6 other brands. A representative part number is CSF 3571.

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 2007 Cadillac CTS come from 2 brands — ACDELCO and GATES. Every part fits all 3 engine options (2.8L V6, 3.6L V6 and 6.0L V8).

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

9 Radiator Fan Assembly parts are listed for the 2007 Cadillac CTS, from TECHPRO, DORMAN, GPD and 4 other brands. DORMAN 621101 carries the "Popular" badge. 3 parts fit every engine; the other 6 are engine-specific.

Economy: 5 parts, from TECHPRO, DORMAN and GPD. A representative part number is DORMAN 621101.

The Standard Replacement section: 4 options from TYC, FOUR SEASONS, UAC and 1 other brand. TYC 623460 is listed in this group.

This group includes DORMAN 621101, GPD 2811686 and TECHPRO GM3117110 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

13 Radiator Hose parts are listed for the 2007 Cadillac CTS, from CONTINENTAL, GATES, ACDELCO and 1 other brand. ACDELCO 20417S carries the "Popular" badge.

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

DORMAN supplies the 5 Radiator Upper Air Baffle Retainer / Clip parts for the 2007 Cadillac CTS. DORMAN 700579 carries the "Popular" badge. 2 parts fit every engine; the other 3 are engine-specific.

Part numbers include DORMAN 700579, DORMAN 961359 and DORMAN 700061, 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

35 Temperature Sender / Sensor parts for the 2007 Cadillac CTS come from 19 brands — STANDARD MOTOR PRODUCTS, WALKER PRODUCTS, NTK and 16 other brands. The "Popular" part is SKP SKTX89. Economy, Full Service Kit and Standard Replacement are all represented, and Standard Replacement alone accounts for 23 parts.

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 2007 Cadillac CTS, from MOTORAD, CALORSTAT, GATES and 6 other brands. MOTORAD 5456187 carries the "Popular" badge. They are grouped as Economy, Heavy Duty, Performance, Premium and Standard Replacement, with Standard Replacement the largest group at 19 parts from MOTORAD, CALORSTAT, GATES and 4 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

30 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 2007 Cadillac CTS come from 7 brands — FEL-PRO, GM GENUINE, MAHLE / CLEVITE 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

6 Thermostat Housing / Water Outlet parts are listed for the 2007 Cadillac CTS, from AUTOTECNICA, DORMAN, GPD and 3 other brands. MOTORAD CH2836 carries the "Popular" badge.

Economy: 3 parts, from AUTOTECNICA, DORMAN and GPD. A representative part number is AUTOTECNICA GM0718508.

The Standard Replacement section: 2 options from MOTORAD and FOUR SEASONS. MOTORAD CH2836 is listed in this group.

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

This group includes MOTORAD CH2836, AUTOTECNICA GM0718508 and DORMAN 902836 and the remaining parts above.

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

25 Water Pump parts are listed for the 2007 Cadillac CTS, from US MOTOR WORKS, SKP, FVP and 12 other brands. BECK/ARNLEY 1312378 carries the "Popular" badge.

Economy: 13 parts, from US MOTOR WORKS, SKP, FVP and 5 other brands. A representative part number is BECK/ARNLEY 1312378.

The Standard Replacement section: 12 options from ACDELCO, GATES, GM GENUINE and 4 other brands. ACDELCO 252921 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

15 Water Pump Gasket parts for the 2007 Cadillac CTS come from 9 brands — FEL-PRO, VICTOR REINZ, APEX and 6 other brands. The "Popular" part is FEL-PRO 35859.

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: 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

5 Water Pump Seal / O-Ring parts are listed for the 2007 Cadillac CTS, from APEX, FEL-PRO, GM GENUINE and 2 other brands.

Listed part numbers: APEX AWP3151, FEL-PRO 35633 and GM GENUINE 12691259, plus the other parts above.

This table covers the Water Pump Stud kits. Read more

ARP supplies the 3 Water Pump Stud Kit parts for the 2007 Cadillac CTS.

Part numbers include ARP 1343201, ARP 4343202 and ARP 1343202.