Volvo S70 Made from 1998 to 2000, this sporty model replaced the 850 sedan and instantly became a hit.

Coolant Issues

  #1  
Old 03-04-2018, 07:59 AM
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Default Coolant Issues

Hey guys, I've been following these forums for a while but decided to make an account because I had an issue this morning that I couldn't find described. Some background: I drive a 99' non-turbo s70. I've had previous issues with leaking coolant, but have fixed most of them. I've replaced the radiator, practically all the hoses, even bypassed the heater core until I can find the time and money to replace it. All this has led to a Volvo with no AC/heat, but no coolant leaks, until this morning.

I was pulling out of a driveway, when smoke/steam started billowing out of the engine bay. Not a little, a lot, to the point of it being able to see. Pulled back in the driveway as my coolant light came on. The reservoir had completely emptied in a couple of seconds, evidenced by the giant spot on the road and trail leading to the driveway. After a quick once over, I could not find the source of the leak. All the hoses I had replaced looked fine, after some feeling around I determined they were not leaking. Filled the reservoir with water, started it back up, and tried to pinpoint the leak. It seems to be dripping in the center of the car between the passenger and driver side, slightly behind the front wheels. It's now a slow leak, not seeming to have made much of an impact over the past hour or so. I have practically no idea what it is, my best guess is a water pump.

Has anyone had a similar issue or know what could have caused all of the coolant to leak in seconds before going back to a slow leak?
 
  #2  
Old 03-04-2018, 10:23 AM
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Check to make sure the bypass of the heater core didn't let go.
 
  #3  
Old 03-04-2018, 01:42 PM
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The only thing that comes to mind is the coolant pipe that runs along the back side of the engine. Check for a failed hose and/or O ring.
 
  #4  
Old 03-05-2018, 08:40 AM
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Yep, that coolant pipe could be the issue as well.
 
  #5  
Old 03-06-2018, 05:36 PM
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Originally Posted by Psaboic View Post
Yep, that coolant pipe could be the issue as well.

I was finally able to throughly check it today. The coolant pipe is fine, and then bypass did not let go. The bypass did, however, have a massive tear in it. This'll be the second time I replace it. Thanks for the help guys.
 
  #6  
Old 03-07-2018, 08:52 AM
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Glad you found it and will be able to fix it. Get a heater core when you can. It is not too bad to replace if you are handy with general tools and repairs. I did one on my son's 98 and it took about an hour or so.
 
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