Northstar Engines and System Technical Discussion Discussion, 2002 Deville Overheating after Thermostat replacement in Cadillac Engine Discussion; Replace thermostat about a month ago and all worked fine, but now it is overheating again. Any thoughts?
Help would ...
Re: 2002 Deville Overheating after Thermostat replacement
Originally Posted by 04GrandAmGT
sounds like you might be lucky and just have a clogged purge line. theres a hollow bolt that the purge line clamps to thats normally the point where it gets clogged
To check the purge line: Start the car, remove the rad cap, and then remove the purge mine where it connects to the coolant tank. Coolant should be flowing from the line you disconnected. If not, it is clogged somewhere. Per Everett, the hollow bolt the purge line connects to is typically the culprit. Take some compressed air and flow it out. It should start flowing again. If that does not work, you can take the appropriate sized drill bit, and carefully drill the hole out to clear the crap.