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Old 02-27-2014, 02:43 PM
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Residue, but temps are fine?

I apologize in advance for yet another degas thread, but I searched and searched until I got tired head, and never found this exact scenario.

2005 with 140k miles, stock gaskets/studs, EGR deleted and oil cooler replaced about 30k miles ago. The degas bottle was cracked and replaced around that same time. It got a new water pump a couple of months ago. The truck has been running great. I'm running the canned SCT street tune.

I'm losing a very small amount of coolant through the cap. Coolant and oil both look fine (no sign of cross-contamination). Coolant is filled to just below the min line. CTS shows my temps are good and my delta stays at 5-8 normally. I watch it very closely and I've seen it hit 11 degrees a couple of times, but not for long, and never higher. No smoke. No odd smell.

I'll replace the cap, but if that doesn't fix it, is it head gaskets for sure? Is there any other explanation? Is a tiny amount of residue "acceptable" (I am thinking its not)?

I planned to make it as far as possible without doing the studs and gaskets. I don't drive it all crazy. Mostly like a grandpa, but I do give it some WOT runs here and there as recommended.

Last edited by jluv; 02-27-2014 at 03:02 PM.
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Old 02-27-2014, 08:36 PM
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You need to do a coolant pressure test, there are quite a few threads in here that have directions on how to do it. I even posted up directions on how to make a tester and how to do it.

Here's my thread on what I'm dealing with
cooling system pressures.. post em up, shops tryin to play games

And here's the thread where I described how to build a tester for the member that created the thread.
HELP! Another Puking Degras Bottle!!!

Btw, no residue is acceptable, and a properly running 6.0 with good heads and good gaskets that are sealing correctly will not puke at all.
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