White bubbles in radiator when pressing accelerator pedal

Tiny
SAJID358
  • MEMBER
  • 2008 SUZUKI MEHRAN
  • 0.8L
  • 3 CYL
  • 2WD
  • MANUAL
  • 61,000 MILES
Recently, my car starting overheating on high speeds. Sometimes it does overheat in traffic jams as well but normally it overheats on high speeds like 80km/hr +. And starts cooling down while in traffic jam. This is extremely strange behavior.

So I performed a radiator flush to flush all the old coolant which was around 2 years old. After flushing, when I started to bleed the air out of system, I opened the radiator cap and started pressing accelerator pedal. Upon pressing the pedal, I noticed whitish milky type bubbles appearing on top water surface but then they disappear when I release the gas pedal. Again when I pressed the pedal, white bubbles appeared on water surface which goes away upon releasing the pedal.
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Tuesday, July 30th, 2019 AT 12:07 AM

1 Reply

Tiny
SCGRANTURISMO
  • EXPERT
Hello,

Milky bubbles in the coolant is a sign that your vehicle's head gasket might be blown. There are a few other ways to get coolant and oil co mingling together, but nine times out of ten it will be a head gasket. As far as when press on the throttle, that might be dislodging some of the bubbles, but usually neither engine oil nor coolant circulate through a throttle body. Here are a few links for you to go to down below:

https://www.2carpros.com/articles/coolantantifreeze-in-the-engine-oil
https://www.2carpros.com/articles/how-to-test-engine-compression
https://www.2carpros.com/articles/head-gasket-blown-test

Please go through these guides and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros
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Tuesday, July 30th, 2019 AT 12:49 AM

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