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  #1  
Old 07-24-2017, 07:56 PM
tbirdmike63 tbirdmike63 is offline
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Default Upper radiator hose replacement

My upper hose needs replacing, the shop manual says to drain the radiator, is this necessary, is there an easier way? Any help would be much appreciated. Thanks!
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Old 07-24-2017, 08:17 PM
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How much coolant is in your overflow tank. If there's not much in there you can pull off the hose from the radiator and just let it spill into a pan. Since you're not reusing the hose you can also just cut it with a razor knife and let it drain out slowly to minimize the mess.

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Old 07-24-2017, 08:21 PM
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You will have to drain it a bit to get the coolant level below the level of the hose you're replacing.

Thankfully there is a little tap gizmo at the bottom of the radiator about 15" below the top hose fitting on the radiator.

How you catch the resulting coolant I'll leave to you but a tray with a large surface area would be a good start.!
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Old 07-24-2017, 10:18 PM
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Thanks, do you think my local Napa auto parts will carry the hose that I need?
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Old 07-24-2017, 10:49 PM
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Quote:
Originally Posted by tbirdmike63 View Post
Thanks, do you think my local Napa auto parts will carry the hose that I need?
They probably won't have it in stock but they can usually get most parts within a few hours. I would check with them.

John
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Old 07-25-2017, 07:59 AM
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Once I get the new hose on and top off the radiator, is there a process to purge the air from the system? Thanks!
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Old 07-25-2017, 10:30 AM
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If you drill 2 - 1/8 holes in thermostat it will allow air to burp from engine system.( in flat body of thermostat )
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Old 07-25-2017, 12:13 PM
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Quote:
Originally Posted by tbirdmike63 View Post
Once I get the new hose on and top off the radiator, is there a process to purge the air from the system? Thanks!
Only fill the overflow tank with coolant until it covers the very bottom. Don't fill it to the top. Then run the engine with the cap off until the thermostat opens. Use a flashlight to look into overflow tank. You will see the coolant begin to rise and fall. Let it run for a few minutes until you see there are no bubbles in the coolant. After it cools off check the coolant level in the overflow again and add if necessary. It should be about 1/3 full. It's important not to overfill it. You need room for it to expand when it gets hot.

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Old 07-25-2017, 05:41 PM
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I put the new hose on, added some coolant, let it run, but I couldn't get the temp. To go over 181 degrees, I think I have a 190 degree thermostat, the coolant was bubbling and moving around, so I shut off the car, do you think it's ok? Thanks!
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Old 07-25-2017, 06:55 PM
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I probably should have made the rational behind drilling holes in thermostat available, but it was early in the morning and I wasn't quite sharp yet.
The common thought is that sometimes an air pocket will be trapped in motor cooling jackets and be dislodged by a sudden bump, roll, or angle of the car when driving. If this air pocket is large enough to fill the void of the thermostat temperature spring the water will keep getting hotter and hotter and the air pocket will not transfer enough heat to open thermostat.
By drilling these holes you allow this air to escape without changing the performance of the thermostat.
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