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Overheating problem - Deville

1118 Views 7 Replies 4 Participants Last post by  Maintenance101, 
M
So I have an 01deville and it has almost 100k on it. I bought it 2 months ago used and it started overheating after a week. Had the system purged manually and it worked fine.... for about three weeks. Then overheated again. Looked at coolant, it was about half a gallon low so I added some. Ran fine. Then I replaced the surge tank and it was good. Then today I parked it on a hill for not even 5 min. When I came out the DIC was going crazy. "Engine coolant hot- idle engine" "engine hot - ac off" "change engine oil" (which is weird considering I just changed the oil 3 weeks ago). There was No ac Running and I let the engine idle after backing the car down off the hill. "Engine overheated - stop engine" so I shut it off, let it cool down turned it back on. Drove a mile and a half and it overheated AGAIN. Had it towed home and here I am. Someone, anyone, ideas?
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M
The thermostat was not changed but radiator flush and manual purge was performed. I have not checked the water pump yet. I know I have a slight leak coming from one of the Rad valves But I can't tell if it's a bad hose or bad Rad. Idle What is going on with my car but it's really getting to me.
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M
"Manual purge" pulled the purge line off checked for a steady stream. My own term. It's a cracked Rad as I can tell right now. Getting that replaced as well as new hoses. Might get a thermostat as well. Really hoping this fixes it otherwise I have to dig deeper And this is going to get very expensive.
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M
Thank you. I appreciate your advice and information. I'm replacing the hoses thermostat and the radiator fully on monday
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