That adds interest to life......

Ok, start the engine cold. Cooling system all sealed up, if the hoses start getting hard right away, you have a head gasket problem. If the hoses don't, replace the radiator cap.

 

ok just started it cold topped it off with antifreeze. Put a 19lb flip top cap on it off my race car so i know its good. Ran it for 3-4 minutes at idle, then drove 4 miles. Flipped the top and it sprayed out the overflow. Turned around four miles back home. Flipped the top and nothing. Took the cap off and its full? but has almost a white film on top. or maybe very small bubbles? Any ideas now?

 

I have one idea. And I don't care if I sound like a dick or not! Put all the F'n info about your truck in your sig for goodness sake, and just so you know, a 16 pound cap is what the system is designed for. So don't try and diagnose it with something that is not stock.

 

But zman, you are soo good at it. (I really need my roll on the floor laughing emoticon.....)

Having all the relevant info on the truck would be a good plan though.

 

95 1500 318 4x4 all stock

 

lmao !!

 

Hell, would it really matter if it was a 6 cyl, 318, or 360, or v10? There aint that many options in the 2nd gen forum. Wouldn't think it would change things much as far as his question goes.

 

You are right, but what about the next time or time after that and so on?

 

Are you overfilling the overflow tank? When the antifreeze heats up it expands. If the overflow tank is already too full, you'll spray out the top when it heats up. When it cools, it should read low. If you take pressure off the system when hot, it will also expand and if there's some way you aren't spraying it all over the engine bay and your face, (like one of those caps with the little lever on it) it'll push into the overflow tank and really make a mess.

I'm not 100% sure you even have a problem. You need to go into more detail about the temp readings on the gauge and exactly what you see going on in the overflow tank. And you need to use a standard cap for diagnosis.

 

dont have an overflow tank. im going to get a new cap today and an aftermarket guage.