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2007 Buick Allure 3.8L coolant issue

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Oct 24, 2015, 11:48 AM

Post #1 of 2 (702 views)
2007 Buick Allure 3.8L coolant issue Sign In


Engine:Series III 3.8L

The car is losing coolant and the local garage can't find anything wrong.

Here's the symptoms of the issue, the temperature gauge climbs over the half mark on the needle to where the fans are going crazy and the car needs to be turned of letting it cool down.

We also keep filing the overflow tank too.

The local garage did a coolant test and found nothing wrong, they did a freeze test among others. they said the head gasket is fine, they said the water pump doesn't leak. They even ran the car on the hoist and nothing was leaking.

The dealer is going to use the dye method to help find the leak this week now.

Didn't GM fix the Series III 3.8's with the intake manifold issue?, but there's no coolant in the oil either? I personal think it's the water pump leaking or the heater core inside the car. We used to always hear a wish wash noise in the passenger area but that has now stopped with the over heating issue above started.

We are just lost on the issue and the near overheating concern.

(This post was edited by Kg14 on Oct 24, 2015, 11:50 AM)

Ultimate Carjunky / Moderator
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Oct 25, 2015, 1:10 PM

Post #2 of 2 (660 views)
Re: 2007 Buick Allure 3.8L coolant issue Sign In

Did they pressure test this when the engine was cold? Maybe let it sit overnight with a pressure tester on it and see if there are any puddles on the floor. What is a freeze test? Never heard of that one. Coolant already has a dye in it. Why dye it again?

The gurgling noise could happen if the coolant level is low or there is a some sort of restriction inside the core.

Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

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