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Originally Posted by blackmarocraig
ok this last week I replaced the CPI, radiator, hoses, gaskets and cleaned the EGR. I have a Prestone radiator cap and I use the orange dex-cool. Could it still be the ween hole and seal in the water pump?
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No, you would smell it if you had a leak.
Are you mixing the dexcool and water 50/50?
also, remember when you replace cooling components you are going to have to purge the air out of your cooling system.
T do this drive your engine up on ramps and while cold remove the rad cap and get inside your truck and turn the temp dial all the way to hot and set the controls to heat.
Fill your rad to the top and then startup your engine, have the engine set to run at about 2000rpms and allow the engine to come up to temperature.
Watch as the thermostat opens and the coolant in the rad drops considerably. Keep on topping up the coolant until it doesn't drop anymore. It might burp a couple of time and the rad level will drop as the air is burped into the rad which will allow coolant to replace it.
when after 10 minutes the level does not drop, attach the rad cap on again and return your engine back to idle.
Fill the overflow tank to 1/2 inch below the overflow line connection you will see when you look into the overflow tank.
Also, did they flush your overflow bottle out?
Did you change your oil after the CPI replacement?