How To Flush, Fix Overheating, Leaks, Coolant Reservoir, Radiator Replacement: Cadillac Northstar
Links Below: Cadillac Northstar engines are known for overheating, and when that happens, heads warp and head gaskets blow. This Deville had a slow coolant leak & a history of overheating due to a failed water pump. I diagnose & repair several coolant leaks (including radiator replacement), replace the coolant reservoir, install a new thermostat and flush the coolant system.
00:00 Intro: Cadillac Deville Coolant Leak & Cooling System Overhaul
00:46 Finding Coolant Leaks
02:56 How To Replace 1999 Deville Radiator
05:20 How To Replace 1999 Cadillac Deville Alternator
05:42 1999 Deville Thermostat
07:32 1999 Cadillac Deville Coolant Reservoir
09:18 1999 Deville Coolant System Flush
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Combustion Leak Test Kit (I've not tested, indicates if head-gasket is leaking exhaust into coolant causing an overheat condition): https://amzn.to/3ufq82b
Deville Repair / Maintenance Series: • 1994 to 1999 Cadillac Deville & Northstar
MotoRad Video: • Video
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Disclaimer: This video is for informational purposes only. I make no warranty, express or implied, on effectiveness or safety. Do not attempt repairs—seek a licensed auto professional. I’m not liable for injury, damage, or loss from using tools, equipment, or content. Product links are informational, not endorsements. Viewer releases Driving Intelligence from liability, claims, or actions related to this video’s use, to the fullest extent allowed by law.
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