Black substance in Coolant?

[Wolf50]

Well I've been noticing this for a while and assumed it was something baked into the bottle as I've been working on the truck and tilting the degas bottle. Sprayed out the degas when I had it off and this stuff seems to have come back. Only notice it when the truck sits and it's cold.

2012-12-10_11-16-41_972_zps2eb0cbdd.jpg photo by wolf5010 | Photobucket

http://s1283.photobucket.com/albums/...ps934262e7.jpg

Any clue what this is?

[dhanna6powerstroke]

Looks like you have an oil cooler issue.

[Wolf50]

Yea I've been hoping it not but I don't know what else it could be. I drained some coolant when I put on my new y-pipe and the coolant looked great. Had a few tiny black flakes or grits of sand but only a few. I was kinda hoping it was somehow casting sand or some type of build up breaking loose after flushing the cooling system not too long ago

[Ford7three]

How does the coolant smell? burnt? like fuel?

[Wolf50]

Doesn't smell burnt and I don't think I smell any fuel. Just smells like coolant to me

[Ford7three]

Did you do a new oil cooler when you did the EGR delete on your truck?

[Wolf50]

Nah, the dealer I bought it from did the work and the headstuds. Took the truck back and made them fix it but at the time I didn't know that you should replace the oil cooler too.

The deltas stay at 15-16 doing fords test but 18-20 with the way I drive on the interstate. I'm holding off on changing it until it starts to rise a little more. I did a full coolant flush a few months ago and that resulted in a little but of casting sand clearing out

[dhanna6powerstroke]

Originally Posted by Wolf50

Nah, the dealer I bought it from did the work and the headstuds. Took the truck back and made them fix it but at the time I didn't know that you should replace the oil cooler too.

The deltas stay at 15-16 doing fords test but 18-20 with the way I drive on the interstate. I'm holding off on changing it until it starts to rise a little more. I did a full coolant flush a few months ago and that resulted in a little but of casting sand clearing out

Do you have a coolant filter? If not, I strongly suggest you get one and I would be replacing that cooler now with those deltas and the oil in coolant.

[Ford7three]

Adding a coolant filter is a good idea on ALL diesels, you would be surprised what comes out of these things. But as stated earlier you might have an oil cooler failure or its plugged up.

[Wolf50]

No coolant filter yet but you guys are right, I need one. Any suggestions? Any personal experience is appreciated