Truck is getting hotter than normal. The upper radiator hose has no pressure when running. What could cause this?
Nov 11, 2024 at 4:28 AM
Overheating, the upper radiator hose has no pressure when running?
WANDAANDBUDDY
- MEMBER
- 14 POSTS
Hi,
Oftentimes, the upper hose not being pressurized is due to a faulty radiator cap or in this case, a coolant recovery tank cap. When the system is pressurized, it increases the boiling point of the coolant and helps with circulation. If you haven't checked that, start there.
Next, if that checks good, I recommend getting a cooling system pressure tester to see if the system can hold pressure. If it does, I would simply flush the cooling system and replace the thermostat. If it doesn't hold pressure, then we need to locate a leak. Here is a link explaining how to pressure test it. You will need a pressure tester, but most parts stores will lend one to you.
https://www.2carpros.com/articles/radiator-pressure-test
Let me know your thoughts and if you have other questions.
Take care,
joe
Oftentimes, the upper hose not being pressurized is due to a faulty radiator cap or in this case, a coolant recovery tank cap. When the system is pressurized, it increases the boiling point of the coolant and helps with circulation. If you haven't checked that, start there.
Next, if that checks good, I recommend getting a cooling system pressure tester to see if the system can hold pressure. If it does, I would simply flush the cooling system and replace the thermostat. If it doesn't hold pressure, then we need to locate a leak. Here is a link explaining how to pressure test it. You will need a pressure tester, but most parts stores will lend one to you.
https://www.2carpros.com/articles/radiator-pressure-test
Let me know your thoughts and if you have other questions.
Take care,
joe
Nov 11, 2024 at 11:33 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement
parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.