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I have 2005 Buick century with the 3.1l engine in it, when i…

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I have 2005 Buick century...
I have 2005 Buick century with the 3.1l engine in it, when i turn the car on it will over heat within a mile or two, previous owner says it leaks coolant, we put some coolant in the car, drover around and the car had no visibly leaks, oil looks clean, however there is a tick coming from the engine bay, it doesn't sound like a rattle like a clogged cat, i am also getting a P0420 code. Have not really dug into the car yet, just getting some advice in witch direction to go.
Submitted: 4 months ago.Category: Buick
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Answered in 1 minute by:
12/12/2017
Buick Mechanic: david craig, ASE Certified Technician replied 4 months ago
david craig
david craig, ASE Certified Technician
Category: Buick
Satisfied Customers: 5,173
Experience: owner/mechanic at 3D Automotive
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Hi my name is ***** ***** I'll be more than happy to assist you. Please allow me a few minutes to review your information. Thank you

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Customer reply replied 4 months ago
sounds good
Buick Mechanic: david craig, ASE Certified Technician replied 4 months ago

with the engine at operating temp make sure the upper and lower radiator hoses are equally hot. let me know. thank you

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Customer reply replied 4 months ago
How long do i have i am not around the vehicle at the moment, can i let you know in the morning or do i need to know now?
Buick Mechanic: david craig, ASE Certified Technician replied 4 months ago

you have as long as you want my friend. tomorrow is fine

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Customer reply replied 4 months ago
Thanks sir
Buick Mechanic: david craig, ASE Certified Technician replied 4 months ago

you bet

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Buick Mechanic: david craig, ASE Certified Technician replied 4 months ago

hows it going?

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Customer reply replied 4 months ago
went and tested it, neither where worm.
Buick Mechanic: david craig, ASE Certified Technician replied 4 months ago

did you check the coolant level?

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Customer reply replied 4 months ago
did notice as well as there is some smoke coming from under the valve cover.
Buick Mechanic: david craig, ASE Certified Technician replied 4 months ago

ok, its apparent there's a leak. you need to have a coolant system pressure test done to see if the leak is internal or external

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Customer reply replied 4 months ago
Already done and no visible leaks.
Buick Mechanic: david craig, ASE Certified Technician replied 4 months ago

the system held pressure?

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Buick Mechanic: david craig, ASE Certified Technician replied 4 months ago

did the system hold pressure?

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Customer reply replied 4 months ago
System did not look like it held pressure, got to looking at it myself as well and noticed the top radiator hose is wormer than the bottom
Buick Mechanic: david craig, ASE Certified Technician replied 4 months ago

they both need to be very hot.

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Customer reply replied 4 months ago
They are both hot but the upper is hotter than the lower
Buick Mechanic: david craig, ASE Certified Technician replied 4 months ago

it might only be the pressurized cap that has failed not allowing it to pressurize to 16 psi.

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Buick Mechanic: david craig, ASE Certified Technician replied 4 months ago

try bleeding the system again.

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Buick Mechanic: david craig, ASE Certified Technician replied 4 months ago

hows it going?

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