Stant thermostat modification?
Thread Starter
MECP Certified Installer
Joined: Feb 2009
Posts: 3,176
Likes: 3
From: Mesquite, TX-DFW
How is the hose when the car has sat overnight? It is supposed to maintain pressure until it cools off and the water contracts, and will eventually draw a vacuum and pull water from the overflow resevoir.
It could also just be a weak hose needing replacement. They tend to get very swollen and weak when they get old.
It could also just be a weak hose needing replacement. They tend to get very swollen and weak when they get old.
ok jjwalker im already replacing soon. will it be ok to just leave the block off plate on the filler neck i know s5 necks don't even have one... i believe it does contract if i leave it overnight i will check in the morning....
Thread Starter
MECP Certified Installer
Joined: Feb 2009
Posts: 3,176
Likes: 3
From: Mesquite, TX-DFW
You mean the cap that you have on your filler neck? Yeah, you can leave it there.
Joined: Apr 2005
Posts: 3,785
Likes: 30
From: And the horse he rode in on...
jackchild. i know the system is supposed to be pressurized, but is it normal for the top hose to become really pressurized to the point where it looks inflated even after turning the car off? i decided to block the filler neck off because i seen the little plastic cap assembly piece cracked and i found where the leak was coming from and i had thought that maybe this is where my system was sucking in air. i was right about the leak but i still have the pressure...
thanks guys.
thanks guys.
The system should pressurize to 13 psi. Thermal expansion will cause coolant to flow into the overflow tank. When the system cools, the coolant to contract. This creates a vacuum that pulls coolant back into the system from the overflow tank.
Does this describe how your system is set up?
Block off plate? Do you have a pressure release cap and a hose that goes to an overflow/expansion tank?
The system should pressurize to 13 psi. Thermal expansion will cause coolant to flow into the overflow tank. When the system cools, the coolant to contract. This creates a vacuum that pulls coolant back into the system from the overflow tank.
Does this describe how your system is set up?
The system should pressurize to 13 psi. Thermal expansion will cause coolant to flow into the overflow tank. When the system cools, the coolant to contract. This creates a vacuum that pulls coolant back into the system from the overflow tank.
Does this describe how your system is set up?
and i do have a hose to the overflow
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