MY THERMOSTAT IS FLUCTUATING DRASTICALLY I JUST ...

2004 Hyundai XG350

Tiny

HyundaiXg350L

February, 24, 2013 AT 5:17 PM

My thermostat is fluctuating drastically, I just had it replaced a few weeks ago. Now the heat is blowing cold air, I also noticed my car is stalling when I sit at a long light. I have had 3 diff. Mechanics take a look at it but I got 3 different answers. I want to be confident in knowing the problem before paying to get it repaired.

Thanx

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9 Answers

Tiny

ASEMaster6371

February, 24, 2013 AT 5:21 PM

We cannot see or touch it. What were the 3 opinions?

Is the check engine light on?

Why was the thermostat replaced originally?

Did it overheat at any time?

Roy

Tiny

HyundaiXg350L

February, 24, 2013 AT 5:29 PM

The check engine light isn't on

the thermostat was replaced because occasionally the temp. Gauge would fluctuate now it's ever single time I drive.

I believe its over heating, yes

Tiny

ASEMaster6371

February, 24, 2013 AT 5:34 PM

First thing is get a leak down test done to verify that the head gaskets are not bad.

Beyond that, sounds like air in the system but should have bled off by noe.

Roy

Tiny

HyundaiXg350L

February, 24, 2013 AT 5:46 PM

Can I do a leak test myself or I have to go to a shop?

Tiny

ASEMaster6371

February, 24, 2013 AT 5:47 PM

If you have tool to do the test, yes. It would be cheaper to have someone do it for you.

Roy

Tiny

HyundaiXg350L

February, 24, 2013 AT 5:51 PM

Ok great
someone told me it may be my water pump and they are expensive
.

Could that also be the problem?

Tiny

ASEMaster6371

February, 24, 2013 AT 5:53 PM

Not really no issues with impellers on these pumps.

Start with the test first before assuming anything

Roy

Tiny

HyundaiXg350L

February, 24, 2013 AT 5:59 PM

Ok thanks

Tiny

ASEMaster6371

February, 24, 2013 AT 6:00 PM

Good luck

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