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Search Auto Parts Search 2002 Blazer overheating after thermostat and cap replacement Sign up here!   Email This Post Auto Repair Home>> Automotive Repair>> AC Auto Repair Help Forum waggs1973 New User May 26, 2009, 6:29 PM Post #1 of 3 (2688 views) 2002 Blazer overheating after thermostat and cap replacement Sign In Not being a real mechanic I'm kinda lost. The engine, V6, on my 2002 Blazer is overheating and I've replaced the thermostat and cap and replaced anti-freeze. Little or no heat from heater. About 120K miles. Really not sure of a direction to take. I'm thinking heater core but thats a guess on my part. Ideas? Hammer Time Ultimate Carjunky / Moderator May 27, 2009, 5:05 AM Post #2 of 3 (2682 views) Re: 2002 Blazer overheating after thermostat and cap replacement Sign In You most likely have a cooling system all plugged up with the sludge from not replacing the Dexcool. It's not going to be easy to get it all out but your going to have to run some chemicals through it and repeatedly flush the system out. Remove the heater hoses and manually flush the core with a garden hose. In the end, you still may have to replace the radiator and heater core if you can't get them flushed out enough. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional. Tom Greenleaf Ultimate Carjunky / Moderator May 27, 2009, 9:34 AM Post #3 of 3 (2678 views) Re: 2002 Blazer overheating after thermostat and cap replacement Sign In A tad add: If doing this yourself be VERY careful of removing hoses from heater core - necks are not that strong if you try to flush core separately. As the Hammer said you may still end up with a new core and radiator - also make sure it's really full and the fan works properly, T   Email This Post   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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