cooling system leak

[Ipkyss]

Well I guess I have a leak. Without actually having a leak. Really. Checked every fitting, hose, clamp, tank, radiator. Can't find a single drop anywhere. Coolant level does not change an 1/8 of an inch. But. The coolant system does not hold pressure. After a drive, Loosen the cap and it has pressure. Let it sit for an hour and nothing. Also tried a new cap and that didn't help. I know its not really an issue, but what am I missing

 

[Jeremyleggett07]

Heads slightly lifting under load? Or a pressure leak some where

 

[78f100]

When I got my truck it had a really slow leak, most wouldn't have even noticed it. I checked the coolant every morning and noticed it was droping slowly over a couple of weeks and occasionally I could smell it . We had to put 20psi on the degas bottle and found it was a heater hose. I looked every where and never would have found it without pressure testing. Good luck finding it!

 

[Dzchey21]

Check the lower radiator hose. The pressure should go way as the heat goes away.

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[Ipkyss]

Check the lower radiator hose. The pressure should go way as the heat goes away.

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I have checked all the hoses. no drip or signs of ever dripping, or dried coolant. I was starting to add coolant quite offen before studs. Didn't matter if the truck sat for a week, it always had pressure when I pulled the cap.

I guess what is happening now maybe normal and not an issue at all? This is probably the first truck I have had without some sort of head gasket issue. Coolant level has not moved an 1/8" in almost a year now.

 

[Ipkyss]

Check the lower radiator hose. The pressure should go way as the heat goes away.

Sent from my DROID BIONIC using Tapatalk 2

I have checked all the hoses. no drip or signs of ever dripping, or dried coolant. I was starting to add coolant quite offen before studs. Didn't matter if the truck sat for a week, it always had pressure when I pulled the cap.

I guess what is happening now maybe normal and not an issue at all? This is probably the first truck I have had without some sort of head gasket issue. Coolant level has not moved an 1/8" in almost a year now.