How do you flush out the coolant system in a 2003 Implala 3400 V6

That is a fun project. You will have to remove brackets and power steering pump to get to the elbows. Also, do not replace them with plastic (like the factory ones). Oreilly Auto parts has aluminum ones that replace them and they will never break again.

Thermostat stuck open , heater core plugged ! Have you had the cooling system flushed ? Does your coolant look like a muddy color instead of dex-cool orange , you haven't mix green coolant with dex-cool - GM coolant , that would clog the cooling system up .

Give me some more information about this problem. May be i can help.

Two things I have run across in tyhe Implala is a bad water pump causing this or air in the system that causes the temp gauge to spike.

wuold suggest you replace complete assy clutch and comp this will be more expensive but will be better in the long run if a clutch goes bad usually form to much strain from compressure pressures if you do this at home you will still need to see a shop for vacume on the system before recharge

It's more than likely the thermostat. If you have a 3800 V6 this is a very quick and easy fix. It you have a 3400 engine, this can be a pretty frustrating job. The bolts that hold the thermostat housing on are very difficult to get at on a 3400 engine. Either way, the thermostat itself is only $10-$12.

If your thermostat is stuck open the engine coolant will constantly circulate and won't warm up to normal operating temperature. Since it isn't warming up, you won't have any heat inside either.

Hello and welcome. here is the coolant cap. for your vehicle


Engine Cooling System

• 3400 (Code E) V6

10.7 L
11.3 qts

• 3800 (Code K) V6

11.0 L
11.7 qts

• 3800 Supercharged (Code 1) V6

11.0 L
11.7 qts

See this picture:
http://i2.photobucket.com/albums/y48/ZeeVert/2002%20Impala/beltroute.jpg

hello your intake gasket is most likely leaking internally into your engine.pretty common problem.the plastic and silicon gaskets get weak over time.

hey, i just flushed out my coolant system a month ago. it is located (if you face the front of the car) on the bottom right. it will drain straight down to the ground and you have to unscrew it from the back of the radiator. it is covered by a pastic piece and sits right on the radiator frame. hope that helps some!!