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Old 02-05-2014, 04:53 AM
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Stumped

All,

I'm helping out a fellow 6.0 owner and I'm stumped. His rig has the following mods: EGR delete, new oil cooler, new filters, new radiator, ARP studs, all gaskets are new, OEM head gaskets, heads were decked and checked for cracks. Dummy plugs, standpipes, SCT fitting are all upgraded. During WOT runs his ECT and EOT are 2-8 deltas apart. Coolant system was flushed and then did a reverse flush. Everything sounds good eh? Somehow he is still losing coolant, under load (towing with 3,000 lbs) he has white smoke coming out of the exhaust and still puking coolant. No leaks from any hoses at all, dry as a bone underneath his rig. No loss of power and she runs like a champ. No tunes or programmers. Coolant stays topped off at the "new" fill mark so his degas is not overfilled. Any suggestions?
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Old 02-05-2014, 05:04 AM
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You said coolant stays full but pukes? And you say it smokes white? Only towing? I hate to say it man but it sounds like there is some debris or studs weren't torqued properly on the heads. Was the egr deleted or a plug jus welded on the end? If plug was welded id check that first. It'd be the easiest


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Old 02-05-2014, 05:15 AM
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I meant to say he only tops off his degas at the "new" fill line when he pukes coolant. Only place it looses coolant. Full EGR delete was done. Only white smoke he gets is while towing. I will make sure he torqued head studs down properly. Other than that, I'm at a complete loss.
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Old 02-05-2014, 05:18 AM
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Steam can only come from one thing. Water in the combustion chamber. Its rare for a head gasket to do that but it can happen


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Old 02-05-2014, 06:05 AM
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It could be the puking is misting below the truck and it looks like it is coming from the exhaust. 3,000lbs is nothing for a load!

Check the pressure of the coolant system.
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Old 02-05-2014, 06:13 AM
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Compression is being introduced to the coolant system(which is why degas is puking) and coolant his being dumped into the cylinders(which is your white smoke/steam coming out of exhaust). Head gaskets are not sealed properly. There will be coolant in the oil or signs of coolant in the oil. Its more prevalent when towing because the engine is under a load. That and I'm sorry because that really sucks after all that work.
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Old 02-05-2014, 07:19 AM
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How many miles are on this stud job? Mine puked for a few miles (maybe 10) when I first did it but I believe it was air being worked out of the coolant system. The cap is designed to self bleed. Now when I hammer on it, it doesn't puke a bit. I've also been removing the cap after driving to 'feel' how much pressure is in the system, and it usually vents a small puff before I can remove the cap. When I had blown head gaskets, I'd have to loosen the cap, allow pressure to bleed off for a few seconds, and then I could remove it all the way.

You sure it's steam from the exhaust? White smoke could also be unburned diesel.
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Old 02-05-2014, 01:17 PM
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I considered unburnt fuel also, but since he was still puking coolant, I didn't put much more into it. After speaking with him again, he did inform that was egr was plugged and not fully deleted. Also...I know 3k I'd not much of a load, just stating what he was hauling when it happened.
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Old 02-06-2014, 04:33 AM
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There is a long shot, but there is a slim possibility that his degas bottle cap is just weak. Like all cooling systems, it is designed to operate under pressure. To really check it out, he needs to somehow read the pressure of the cooling system immediately when he cranks it up cold. If it climbs immediately to an unacceptable level, then he is more than likely looking at 1) head gasket 2) possibly a cracked head into the water jacket 3) leaky egr cooler, but I'm not sure if exhaust back pressure would be enough to overpressure the cooling system when cold.

If the engine runs great, then I am inclined to say that the steam coming out of the exhaust is not coming from a head gasket. Usually a very small leak in a head gasket will allow combustion pressure to enter the cooling system, but won't let water run back the other way into the cylinder. Most of the time when I see a gasket blown bad enough to let water into the cylinder, you get an engine that misses.

Sorry to hear all that work is not working out right now.
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