leaking coolant around coolant cap

[T Bone0416]

as it says leaking coolings it was really full and started it up this morn it was 17 outside turned on the high idle and let it wamr for alil went to get in it and smelled coolant ???? help me lol

[thomaslord84]

If you fill them up too much it will puke until it gets the level where the truck wants it. Your cap could also be bad, they are like $15 from Ford. You could also have a HG blown.

[NYC F-350]

Coolant level should be 1/4 inch below the minimum line when cold.
If it was higher than that, it could puke it out.
If it was in that range, try a new cap first.
If it still pukes, "T" in a pressure gauge into the small hose that goes from the intake back to the degas bottle. The pressure should not exceed 16psi, if it does (and your egr is deleted), your head gaskets are toast.

[joe_r_dog]

agreed. it is very common for those caps to go bad so get a new one. just so ya know the old add mark is basically the new full mark.

[kreepin2g]

Originally Posted by NYC F-350

Coolant level should be 1/4 inch below the minimum line when cold.
If it was higher than that, it could puke it out.
If it was in that range, try a new cap first.
If it still pukes, "T" in a pressure gauge into the small hose that goes from the intake back to the degas bottle. The pressure should not exceed 16psi, if it does (and your egr is deleted), your head gaskets are toast.

i drove mine with the pressure gauge on for about a half hour. test was done unloaded so dont know if that will hinder the test results. gauge topped at 12, took prolly 20 minutes to get there. i dont think head gaskets are bad what do you think.

not truck in sig, got a 6l now egr delete

sorry for hijacking

[Term3]

I would say no to head gaskets. Did the same test on a known engine with a bad head gasket and with a cool engine, WOT for a short run you could see the pressure rise fairly rapidly to the 16 psi relief pressure. Could also get one of those tester kits to see if exhaust gases are in the coolant

[kreepin2g]

where would i buy one of the tester kits

[Term3]

Here's one link I'll try to find another one I have.
http://www.acustrip.com/afcoolprod.html

[NYC F-350]

Check the cooling system pressure under HARD acceleration, preferably under loaded conditions.