OEM 2004 Cadillac CTS Coolant Reservoir

2004 Cadillac CTS Coolant Reservoir Parts and Q&A

• Q: How to service and replace the Coolant Reservoir (LHD M 35) on 2004 Cadillac CTS?

  A: Service procedures on the Coolant Reservoir (LHD M 35) start with coolant draining. First disconnect the Coolant Reservoir inlet hose and then remove its upper bolt. First clear the necessary area by unscrewing clutch master cylinder reservoir bolts then move the reservoir to a safe location. Remove the master cylinder nuts so you can move the cylinder away from the vacuum Brake Booster without breaking the brake lines. Loosen and slide the clamp on the Coolant Reservoir outlet hose using hose clamp pliers (J38185) before disconnecting the outlet hose. To access the Coolant Reservoir you must first remove the lower tank bolt and the air inlet grille bolt which enables lifting the panel out of the way for Coolant Reservoir removal. The following procedure involves removing both the Coolant Reservoir along with disconnecting its low coolant sensor electrical connector. During the mounting process, position the Coolant Reservoir behind the air inlet grille screen while connecting the low coolant sensor electrical connector. Set the air inlet grille into its final position before fastening the Coolant Reservoir nut to a torque of 9 nm (80 inch lbs.). Secure the Coolant Reservoir outlet hose with hose clamp pliers (J38185) before relocating the hose clamp. Connect the Coolant Reservoir inlet hose then install its lower bolt with 9 nm (80 inch lbs.) of torque. Screw and tighten the Coolant Reservoir bolt to 9 nm (80 inch lbs.). Fasten the clutch master cylinder reservoir bolts where they require a torque of 50 nm (37 ft. Lbs.). Secure the master cylinder to the vacuum Brake Booster then torque its nuts to 25 nm (18 ft. Lbs.). Finally, fill the cooling system.