How to Replace Radiator Coolant Overflow Bottle 96-99 Cadillac Deville

Difficulty: Intermediate · About 90 min · Cadillac Deville

Replace the radiator coolant overflow bottle, including removing the battery for access, on a 1996-1999 Cadillac DeVille.

Steps

1. Remove the battery

   Flip up the plastic cover, remove the panel's five 13mm bolts, disconnect the negative cable then the positive, remove the 13mm mounting bolt, then lift the battery out.

2. Remove the old coolant bottle

   Disconnect the hose with a flat blade screwdriver, remove the two 8mm bolts and the 10mm bolt, remove and set aside the bracket, disconnect the lead and the larger hose (placing a catch pan underneath since the lower hose will drain), then remove the bottle.

3. Install the new coolant bottle

   Hook up the lower hose and secure its clamp, bolt the bottle down with the 8mm and 10mm sockets, plug in the lead, connect the upper hose and tighten its clamp, then fill the reservoir to the fill line with coolant.

4. Reinstall the battery

   Set it into place and bolt down the 13mm mounting bolt, connect the positive terminal then the negative, then bolt the panel back down with its five 13mm bolts.

Check your vehicle’s repair manual for exact specifications and fit.