Coolant Going Away

[LoCo]

Hello Folks,

I've been lurking around the forums here for a month or so since I got my 2004 250 Crew Cab Long Bed and love all the great info! Still trying to get my truck straightened out though.

I took it to the dealer for using coolant, the EGR valve was replaced just before I bought it, this time they replaced the EGR cooler. Also, in case it's relevant, the had the engine out replacing the rear main seal and most of the external gaskets on the engine. Anyway, it's still using coolant. After about 300 - 400 miles the tank is empty. Soooo...the question is can the head gaskets be bad and not be puking coolant out of the tank. I don't notice any smoking and no external coolant leaks...it's just going away!

Thanks for the help

[LoCo]

Guess everyone's eating Easter Dinner!

[LoCo]

Well, since I've got a bunch of views and no replies...here's what the dealer had to say. Nothing wrong with it! Said they pressure tested the system and found no leaks so nothing is wrong. It was probably an air bubble from having the system drained. Now I work on air cooled motors for a living, so I'm no coolant expert, but, having to add 1/2 gallon of coolant seems like one hell of an air bubble to me! Guess we'll see . . .

[davegr1]

I replaced the coolant in mine this week, it also ran for day and then I added about 1/2 a gallon, it was an air bubble. They are notorius for them, I found out if you drain the entire block, (via the plug in the back of the heads) it will do this.

[LoCo]

That makes me feel better!

[Vizsla]

It can take awhile to get the air out of it. I found that if you find a little hill, pull up, back up, and side to side helps burp them out. 1/2 gal. is pretty normal from my experiences.

[2005F250]

Is it every 300-400 miles the tank is empty or did it do this once? If it is empty every 300-400 miles the EGR cooler may be busted again and/or the head gaskets are blown.

[LoCo]

It was every 300 - 400 miles it was empty. Then the egr cooler was replaced. After 300 miles it was empty again so I took it back, they're Supposed to put some miles on it today. I guess we'll see if it was a one time thing.

[05-F350]

I had water disappearing in my system. no external leaks. check oil cap to see if full of water. waiting for EGR cooler replacement at dealer today.

[2005F250]

Blown headgaskets more than likely.