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04-08-2019, 04:06 PM | #1 |
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Radiator under constant pressure?
On my Olds motor the radiator is always under pressure. Does not or did not over heat when running last weekend. 130-180 tops Even sitting for 2 days later I went out and checked and hoses were rock solid and water blew out when cracking open cap. Do I have air in system? I would have thought in 2 days system would be pressure free
Last edited by Jeff Stout; 04-08-2019 at 04:07 PM. Reason: more |
04-08-2019, 06:59 PM | #3 |
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Re: Radiator under constant pressure?
Does the car have a coolant recovery tank with the correct style radiator cap?
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04-08-2019, 07:13 PM | #4 |
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Re: Radiator under constant pressure?
It does have an overflow tank. I will look at pressure written on cap. Maybe it is too high.
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04-08-2019, 07:42 PM | #5 |
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Re: Radiator under constant pressure?
Check to make sure the hose into the recovery tank isn’t clogged, I’ve also seen the inlet into the tank molded shut or never drilled open.
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04-08-2019, 10:17 PM | #6 |
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Re: Radiator under constant pressure?
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04-12-2019, 02:56 PM | #7 |
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Re: Radiator under constant pressure?
I had that issue and it was electrolysis. Put an ohm meter in the water and see how many volts you have.
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04-16-2019, 06:22 PM | #8 |
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Re: Radiator under constant pressure?
This is correct. Make sure your radiator is grounded to the chassis. You could also have a issue with a chemical reaction with any additive you may be running in your coolant. I would do a complete flush and add only water.
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04-16-2019, 08:04 PM | #9 |
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Re: Radiator under constant pressure?
Im finishing on healing from surgery. When I can I will check electrolysis in radiator. I know radiator is held in place with rubber and plastic. No metal to metal contact. Currently straight water. I will also vacuum down water system to remove any air in system. I have 2 engine shops stating air locked
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04-16-2019, 11:40 PM | #10 |
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Re: Radiator under constant pressure?
Jeff - I would think that if you had air trapped in the cooling system you would experience a problem with overheating, which doesn't seem to be the case. Is this a "new" issue you're experiencing or has this been going on for a while? The reason I ask is because if the cooling system is working properly, there is no reason why the pressure shouldn't remain (it's a sealed system) and usually when the pressure drops it's because of a leak somewhere. The pressure is regulated by the rating on the cap, so anything above that number goes to the overflow tank. If you have a Stant (or similar) radiator tester they have a way to check the cap as well.
Hope the healing process goes quickly. Lew
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