Gauge watchers

[Intrnlstorm]

Ok here is the story...

Last summer I bought a 2004 f-250. Love it. First thing I did was bought the edge insight cts gauges to see what was going on. Worst day of my life. I watch those damn gauges waiting for something to happen. Ok the deltas were around 20-25degrees and that scared me. So I tore down the truck in my driveway and did what I was supposed to. Oil cooler, EGR delete and coolant filter.

Deltas were now at 8-12 and the truck was running great. I was upset that the deltas were still high and I thought that that I didn't flush the system enough. I did flush the hell out of it. I was still puking and everyone said that my coolant level was too high. I hooked up a gauge to check coolant pressure. 16-18psi all the time. Never returned to zero. Damn...

Ok so a couple of weeks ago I started collecting parts for head gaskets with arp bolts. I bought a 2005 engine and had the heads pressure tested, vacuum tested, and decked so I would have little down time. BTW I have 2004 heads for sale so I did a cab off head gasket repair. Not too hard, just a long process for the first timer.

I had an exhaust leak and a slight fuel leak but over all it was a success. Ok now on to the gauges. The EOT and ECT deltas are now down to only 2 or 3 degrees. Awesome, Don't need a new oil cooler. Coolant pressure is up to 8 psi at operating temps and drops with the temp. Everytime I get into the truck in the morning the psi is at zero and rises to 8psi at operating temp. Before the gaskets it would go to 16-18 but never drop to zero.

Just some observations that I have before and after head gaskets.

Joel


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[Bluedemon6.0]

Hey, your story sounds like mine. I have a 04 psd and I bought gauges a couple of months ago and low and behold my delta was 45*. I flushed the coolant and my delta is stil 25* so I figured to go ahead and do studs, oe cooler, and a few other mods. Hopefully I will be good for a while. I guess you had a slight head gasket leak causing a slight spike in your eot it makes since. I guess?
If you don't mind me asking, how long did the tear down and install take?

[WarChild]

The pressure in the Degas bottle is not suppose to drop to 0 overnight unless you have leaks in the system.

[Intrnlstorm]

Originally Posted by WarChild

The pressure in the Degas bottle is not suppose to drop to 0 overnight unless you have leaks in the system.

Good to know. Maybe it's the cap. I bought a new one last summer and it's been venting ever since. I'm not losing coolant. Any other ideas?

Joel

[WarChild]

My old caps would go bad all the time. I tend to replace them once a year now.

[Intrnlstorm]

Replaced my cap but it still does the same thing. Starts at 0psi in morning. Rises to 8psi during driving at normal temp. Drops to 0psi when cold again. Thinking about this though and that sounds normal. Volume remains constant, therefore the increase of temp will bring the increase of pressure and vice versa. Now if my headgaskets were leaking and introducing exhaust to pressurize the system it shouldn't return to 0psi unless I removed the cap.



Joel

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[WarChild]

Nope. If your heads were leaking it would not maintain pressure as it would leak through the heads.

[Intrnlstorm]

It would leak through the heads if they were still hot. My truck was fine until it hit operating temps then the degass would puke. It held pressure for days. Everything is working now perfect.

[atvrider93]

If the pressure starts at 0, it should return to 0. Simple physics, PV=nRT

[KCPowerStroker]

My truck does exactly the same thing....I'm unstudded but I pull 10K trailer at 75 using a tow tune and only see 8-10 psi and every time in the AM I'm a 0 PSI on my pressure guage. It has always gone back to zero and I'm not puking or experiencing any other issues at all.

I'd say you are just fine, but that's just an opinion.