Learned something interesting today
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Laughing Gas
Joined: Aug 2018
Posts: 934
Likes: 248
From: CA
Learned something interesting today
Well went camping today and pulled my trailer up the 101 and over the Cuesta grade. In the past pulling up grades if that size would give me the Tes kettle whistle. I tried something interesting today. I closed the valves to coolant filter and my degas never vented. I watched my temps and pressures. The pressures were lower at all temps. And I got no pressure bump from increased RPM, like before.
Had anyone seen anything like this. It seems my coolant filtration system might be the source of my coolant pressure issues.
Had anyone seen anything like this. It seems my coolant filtration system might be the source of my coolant pressure issues.
Tuned
Joined: Mar 2010
Posts: 286
Likes: 12
From: Central CA
Well went camping today and pulled my trailer up the 101 and over the Cuesta grade. In the past pulling up grades if that size would give me the Tes kettle whistle. I tried something interesting today. I closed the valves to coolant filter and my degas never vented. I watched my temps and pressures. The pressures were lower at all temps. And I got no pressure bump from increased RPM, like before.
Had anyone seen anything like this. It seems my coolant filtration system might be the source of my coolant pressure issues.
Had anyone seen anything like this. It seems my coolant filtration system might be the source of my coolant pressure issues.
Thread Starter
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Laughing Gas
Joined: Aug 2018
Posts: 934
Likes: 248
From: CA
I have the XPD coolant filtration system. I know my observation is statically insignificant with a N of 1, but thought my observation was interesting.
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Tuned
Joined: Mar 2010
Posts: 286
Likes: 12
From: Central CA
That is interesting. I just keep wondering what the heck is wrong with my engine and keep thinking it's the heads.
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Hotshot
Joined: Dec 2014
Posts: 17,832
Likes: 3,119
From: Jersey Shore
Most of the industry testing done in my past world was with N of 1. The quality of the observation and procedure is what makes it valuable. From the things you’ve written, it’s got my attention.
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Laughing Gas
Joined: Aug 2018
Posts: 934
Likes: 248
From: CA
Yeah Hartwig, I don't get it either. But I can tell you that I do get a significant pressure rise with RPM flowing through my coolant filter, and that pressure increase has disappeared with closing the valves to the coolant filter. Make no sense.
Postmaster
Joined: Sep 2016
Posts: 3,941
Likes: 240
From: Texas
Jack I know you are asking the OP but just to get more setups on this thread I have the DieselSite coolant return lines, manual ball valves to shut off both heater cores in and out (Excursion) a DieselSite coolant filter, Mishimoto 200 degree thermostat and Dieselsite water pump. Also a DieselSite EGR delete, New Motorcraft oil cooler, Rotella ELC and a 1997 7.3L Hayden fan clutch with BPD adapter nut.
Deltas stay around 8-10 psi and coolant pressure 0-8psi depending on ambient temperature when I start the engine.
Deltas stay around 8-10 psi and coolant pressure 0-8psi depending on ambient temperature when I start the engine.
Hotshot
Joined: Dec 2014
Posts: 17,832
Likes: 3,119
From: Jersey Shore
I'm trying to my head around why this would happen. I had my homemade system set up, but I never monitored coolant pressure. And my towing is pretty mild to what the two guys are having issues with. I don't think either of us has towed the heat with the grades they are.
Either purchased or homemade, we've tapped into the heater line, go through a filter, then return through the radiator degassing circuit. The heater input is direct off the passenger side of the head, interrupts the flow going to the T/S and then to the radiator. In cold weather, the coolant heat is dissipated by the heater core. But right now, if there is a vacuum valve, the hottest coolant may be going directly to the degas bottle via the radiator degas line. But that should not be that different from what flows from the top of the radiator to the degas anyway. Unless somehow it's going to the bottle as higher pressure. Or volume. Is the heater core that much of a volume disrupter?
I don't know .......
Either purchased or homemade, we've tapped into the heater line, go through a filter, then return through the radiator degassing circuit. The heater input is direct off the passenger side of the head, interrupts the flow going to the T/S and then to the radiator. In cold weather, the coolant heat is dissipated by the heater core. But right now, if there is a vacuum valve, the hottest coolant may be going directly to the degas bottle via the radiator degas line. But that should not be that different from what flows from the top of the radiator to the degas anyway. Unless somehow it's going to the bottle as higher pressure. Or volume. Is the heater core that much of a volume disrupter?
I don't know .......