Hissing Cap Normal?
Fleet Owner
Joined: Nov 2003
Posts: 27,881
Likes: 3,595
The cooling system will build pressure as you heat the coolant due to liquid expansion. When it is cools and contracts, there should be very little residual pressure.
If you are worried, tee in a hose and a pressure gauge so you can get actual pressure readings (numbers) when both cold and hot.
If you are worried, tee in a hose and a pressure gauge so you can get actual pressure readings (numbers) when both cold and hot.
Laughing Gas
Joined: Sep 2013
Posts: 1,031
Likes: 13
The cooling system will build pressure as you heat the coolant due to liquid expansion. When it is cools and contracts, there should be very little residual pressure.
If you are worried, tee in a hose and a pressure gauge so you can get actual pressure readings (numbers) when both cold and hot.
If you are worried, tee in a hose and a pressure gauge so you can get actual pressure readings (numbers) when both cold and hot.
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