What if it Snows?

Well it rained yesterday in missouri. Then it dropped to 28'F. So I wait for the sun to come up to take stuff to load my truck and start working. The agent said he was going to issue me the load Friday and didn't, otherwise I would have left Saturday. It will cost me half of Tuesday, where I could have reloaded in afternoon. Agents are bums some times.

 

Doesn’t use any, it just pulls it down only at idle, shows low coolant, but either opening reservoir cap or driving it returns to full.
It’s that accidental KW, can keep the cap loosened and it won’t pressurize.

According to everything I’ve read and watched videos none is doing what this once does, but now I see it could be...
EGR, (doubtful) Water Filter and blockage in line, (doubtful) Air compressor, (what I figure) or head gasket.
But I know no history on the truck, that’s why I’m going to let the mechanic who can pull Cummins insight on it and get some background on it,

 

It should expand with heat. But it always goes back to the same level? I would idle it with cap off. Could it be an air pocket? Buy a vacuum kit and pull on it. I just throwing things out there

But it should expand with heat.

 

Yeah, that’s what throws me off, it’ll idle for about 15 minutes, nothing.
It gets around 150 water temp you can watch in the reservoir the coolant being pulled down, it then looks about 1 to 1.5 gallon low, low coolant light comes on.
You can loosen the cap, it’ll be under a lot of pressure, but you’ll hear it release and coolant goes rises back up to full.
Or drive it, it takes about a mile at road speed and the coolant will go back to full.

Then after idle for about 5 to 10 minutes it’ll drop coolant level again to repeat.

But the head gasket issues I’ve seen in past, and on videos do the opposite, blowing air into the reservoir tank then pushing coolant out over flow.

It’s a head scratcher.

 

Could it be mostly water? Not enough antifreeze, so the boiling point is closer to 212 rather than 226 for proper antifreeze mix, with out pressure. Buy the tester for $8 and see?

 

Man to therapist. "I fear things under my bed". Oh well.. We can handle that. Quoted 5 more sessions at $100.00 per each. Man tells him he will think about it. Never comes back.
Week later meets man on street, chastises for not coming back, needs help. Man says no, all OK now.
Has talked to his bartender and is completely well now. Therapist asks: "Well what did he tell you?"
Man told him: He just said; "Cut the legs off my bed, Worked beautifully."

 

Some of todays systems have a burp bleeder. There is a spot in the system where air gets trapped. You litterally have to back out a drain plug to get the air to come out while the engine is running. Just a thought.

 

I’ve got one... somewhere.

I’m reading more information than most mechanics who just plug in a computer and diagnose.
Also I just read a bad heater core could do exactly the things that this is doing.
Exception is it isn’t losing coolant.

I’ll wait til tomorrow afternoon or Tuesday, gotta deliver tomorrow, bring that truck back drop trailer and park it next to the other truck at the shop.

Tuesday I should do my med card update so I can go to doctor and sit with sick infected people to be DOT safe.