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2008–2013 Cadillac CTS

2008-2013 Cadillac CTS - Water Pump Replacement

🔧🔧🔧 Advanced 2-3 hours $155 DIY 1 views

Save $245 by doing it yourself! Shop cost: $400

Quick Video Tutorial

Parts You Need

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Total Cost
$154.95
Part Name Part Number Price Buy
Water Pump 252-962 $119.95
Water Pump Gasket 12660159 $15.00
Coolant 12346290 $20.00

About prices: shown prices are estimates from typical Amazon listings and change frequently, and cheaper alternatives may be available. Confirm the current price on Amazon before buying.

💡 Pro tip: Order all parts at once to save on shipping

Step-by-Step Instructions

Follow these steps carefully

1

Cool down and drain the cooling system

Work only on a cold engine. Place a drain pan under the radiator petcock or lower hose and drain the coolant. Remove the radiator cap to speed draining. Capture coolant for recycling. Wear gloves and eye protection.

2

Remove belts and obstructing parts

Remove the serpentine belt (and any splash shields). On some engines you must remove a pulley, timing cover section, thermostat housing, or heater hose bracket for pump access — photograph routing and bracket positions first.

3

Unbolt and remove the water pump

Disconnect hoses from the pump if equipped. Remove all water-pump bolts (note different lengths). Gently tap or pry the pump free — do not gouge the aluminum block/timing cover mating surface. Watch for trapped coolant.

4

Clean surfaces and prepare the new pump

Clean all old gasket material or RTV from the block and pump flange without scratching sealing faces. Compare impeller, weep hole, and bolt pattern on the new pump. Install any new O-rings, gasket, or the sealant type the maker specifies (do not combine thick RTV with a gasket unless instructed).

5

Install the new pump and reassemble

Position the new pump, start all bolts by hand, then tighten evenly in a crisscross pattern to the specified torque — overtightening cracks housings. Reinstall the pulley, hoses, belt, and any covers removed. Refill with the correct coolant type mixed as specified.

6

Bleed air, run, and leak-check

Bleed air from the cooling system per the vehicle procedure (bleeder screws, squeeze hoses, or scan-tool electric-pump run). Bring the engine to operating temperature with the cabin heat on and confirm stable temperature with no leaks at the pump weep hole or gasket. Recheck coolant level after cooldown.

All Done!

Test your repair before closing everything up. If something doesn't work right, double-check your steps.

⚠️ Common Mistakes to Avoid

  • • Not properly draining the coolant before starting the repair
  • • Failing to torque the water pump bolts to the manufacturer's specifications
  • • Reusing the old water pump gasket instead of replacing it