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#2
12-18-2023 | 05:23 PM
Senior Member
Joined: Jun 2010
Posts: 15,294
Hi Sam,
It is almost impossible for a heater hose to leak inside the vehicle. If it is leaking in the engine compartment the hose would have to be loose on the core tube to leak..
If you suspect the hose connection, just clean it up and keep a close eye on it.
It does get up to approx.15 lbs pressure when at operating temp and they rarely leak.
What you can do if you want to, rent a cooling system pressure tester and pump the system to NO MORE than 15 lbs pressure cold and you should be able to see the leak.
If it is the heater core,that can be a somewhat big job to replace it . Why not have your favorite shop do the pressure test and then you can make any plans after that.
It is almost impossible for a heater hose to leak inside the vehicle. If it is leaking in the engine compartment the hose would have to be loose on the core tube to leak..
If you suspect the hose connection, just clean it up and keep a close eye on it.
It does get up to approx.15 lbs pressure when at operating temp and they rarely leak.
What you can do if you want to, rent a cooling system pressure tester and pump the system to NO MORE than 15 lbs pressure cold and you should be able to see the leak.
If it is the heater core,that can be a somewhat big job to replace it . Why not have your favorite shop do the pressure test and then you can make any plans after that.
#3
12-18-2023 | 08:11 PM
Thread Starter
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Junior Member
Joined: Dec 2023
Posts: 3
Thank you Hanky,
I forgot to put it in my original question but it is leaking from the outside of my car, but it is coolant. I called and asked a shop what they would charge for a leakdown test on that and they said $450 for just the test so I will definitely be renting one. The thing that stumps me is that from what I can see from under the hood I cant see anything leaking, If you have any more advice on what I should look at next that would be great.
I forgot to put it in my original question but it is leaking from the outside of my car, but it is coolant. I called and asked a shop what they would charge for a leakdown test on that and they said $450 for just the test so I will definitely be renting one. The thing that stumps me is that from what I can see from under the hood I cant see anything leaking, If you have any more advice on what I should look at next that would be great.
#4
12-18-2023 | 11:10 PM
Senior Member
Joined: Jun 2010
Posts: 15,294
How one word can make a big difference.
A leak down test is a lot more different from a cooling system pressure test
A leak down test consists of pressurizing the combustion chamber of a particular cyl. A certain pressure is applied through the spark plug hole and leaks could be from worn piston rings,valves that don't seal well or a gasket leak that allows the air to go into the cooling or lubrication system. That procedure is done for each cyl and that could explain the high cost.
A cooling system pressure test consists of a little hand pump that is connected to the radiator fill hole and pressure is applied there. Takes about a minute and the time is consumed just looking for ANY loss of pressure, coolant leak.
Leak down vs leak test.
Hope that explains it a little clearer.
Depending on where the source of the leak is will determine the cost to repair.
A leak down test is a lot more different from a cooling system pressure test
A leak down test consists of pressurizing the combustion chamber of a particular cyl. A certain pressure is applied through the spark plug hole and leaks could be from worn piston rings,valves that don't seal well or a gasket leak that allows the air to go into the cooling or lubrication system. That procedure is done for each cyl and that could explain the high cost.
A cooling system pressure test consists of a little hand pump that is connected to the radiator fill hole and pressure is applied there. Takes about a minute and the time is consumed just looking for ANY loss of pressure, coolant leak.
Leak down vs leak test.
Hope that explains it a little clearer.
Depending on where the source of the leak is will determine the cost to repair.
Last edited by hanky; 12-18-2023 at 11:13 PM.
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