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Coolant Reservoir Cap Leak

12818 Views 5 Replies 5 Participants Last post by  Heavy_GD
First I want to thank everyone for making this site a great resource for 6.0 owners, I've found this site very helpful for repairs on my new 04 6.0 diesel that I purchased in May 2011!

Here's an issue I noticed, and wanted to get your opinions if anyone has seen this before. Since this is a new truck for me (an I do my own mechanic work) I've been inspecting the truck for issues since I've bought it. This is the second time I've noticed this.

There have been splashes and drops on top of the coolant reservoir cap and tank. It also has seemed to make it to the coolant lines below the tank as well as the air intake line.

It seemed weird since they are drops and not pools or lines from coolant running down.

Is this just a bad cap or something else?


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1 - 6 of 6 Posts
Could just be a bad cap. Cheap to replace. Make sure it is not too full. The "min" mark is the new "max".
clean the area off real good and see how long(or under what conditions) it takes to come back
clean the area off real good and see how long(or under what conditions) it takes to come back
I did, it took about a month for it to happen again.

I read somewhere that ford issued a new replacement for the cap. If that's so, does anyone have a part number or know the difference?
I'm dealing with the exact same thing. I have been filling it to the MAX line when it is cold. and its never fallen below the min line. It's just a couple drops around the cap like yours and I bought a new 16 psi cap today. I hope it is nothing major!
stop filling the degas up.... the 6.0 is known to hide coolant and the min line is actually the max on old jugs
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