Soot in the overflow tank? Is this possible? - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 11-27-2007, 08:07 AM Thread Starter
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Soot in the overflow tank? Is this possible?

Hopefully someone can shed some light on this mystery. Over the holiday weekend I did a motorcycle trackday at Willow Springs here in So Cal. So I was prepping the truck to tow the toyhauler, increasing tire pressure and checking fluids, etc. and I noticed a dark shadow inside the radiator overflow tank. The truck has a tendency to blow a little coolant now and then but nothing too crazy. So I decide to reach my finger in the tank and see what this darkness is and it feels sooty, or even a better description...resiny.
Is this due to overboosting and slightly blown headgaskets or what?

I have a Banks 6gun+SL, and occasionally get on the throttle pretty good.
I have no fluid leaking on the block, or in the driveway, nada nowhere.
So Im wondering if anyone has ever heard of this phenomenon before?
Thanks much in advance.

Rob

9.176 1/8th mile @ 72.81mph 1.921 60ft 0.572 RT
That was with blown headgaskets and only 7 injectors!

SCT X3 by Innovative, Autometer quad pod w/EGT, Boost, coolant and trans temps, Banks intercooler, AFE Stg. 2 w/DryFlo-S, ARP headstuds, 4" TB straight piped, Fitch Fuel Catalyst, Optima YellowTops, coolant filter, and the zoodad mod too.
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post #2 of 4 Old 11-27-2007, 09:05 AM
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r u sure its not oil, and have you had a egr cooler put in anytime

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post #3 of 4 Old 11-27-2007, 09:16 AM
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it is most likely oil. i have some in my tank too because when i did a complete tear down of my motor and rebuild i'm sure some of the oil got into the cooling galleys before the heads were torqued down etc...
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post #4 of 4 Old 11-27-2007, 09:46 AM Thread Starter
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Ive never had any warranty work done at all. I was thinking about taking it into the dealer (its got 29k miles) and having them run the usual tests for EGR valve, EGR cooler, headgaskets, leaks of any kind, but I live in San Diego and the closest mod friendly dealer I have heard about is an hour north of me.
The truck runs like a champ. Pulled the trailer with no probs whatsoever.
I plan on doing studs in the future, but I figured that I would wait until I was told that I had blown gaskets.
I agree it seems like its oil, but how would it get into the cooling system besides passing through during those moments of extreme boost levels.
Rob

9.176 1/8th mile @ 72.81mph 1.921 60ft 0.572 RT
That was with blown headgaskets and only 7 injectors!

SCT X3 by Innovative, Autometer quad pod w/EGT, Boost, coolant and trans temps, Banks intercooler, AFE Stg. 2 w/DryFlo-S, ARP headstuds, 4" TB straight piped, Fitch Fuel Catalyst, Optima YellowTops, coolant filter, and the zoodad mod too.
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