Coolant overflows

joe016 · Feb 16, 2016

Check your air compressor maybe that is bad

Nick524 · Feb 7, 2020

Jmac50310 said: ↑

Ok guys I need help, but please hear out my situation!! I have a 2008 Volvo D16

I started noticing that my coolant keeps overflowing. More when driving, less at idle. It takes time for it to start leaking though once I turn the truck on. I figured it was the thermostat so I replaced it. The thermostat wasn't opening and closing properly, it was scraping up and down. My coolant overflowing reduced but it's still doing it. So I replaced the whole coolant tank. Still the same problem. I felt I was in denial of a blown hg which might be, but check this out.... I took it to the Volvo dealership, they tested for hydro carbons (exhaust) in the coolant tank, nothing. He pumped it about 30 times and the liquid stayed pure yellow. They did a pressure test, results were perfect. Checked oil for coolant, coolant for oil- nothing.
I'm not over heating, I have no white smoke coming out of my exhausts, I get amazing mileage.

I'm completely at loss for what this could be
Please help me with any advice.
If I missed out to put something, ask I will reply asap. I just don't want to pay thousands of dollars when maybe it's something really simple
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Hi, what was the issue with this? I am having the same problem.

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