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S80 '98-'06 / S60 '00-'09 / V70 & XC70 '00-'07 General Forum for the P2-platform S60 / V70 / XC70 / S80 models |
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V70 Turbo - OverheatingViews : 1727 Replies : 11Users Viewing This Thread : |
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Jun 20th, 2019, 18:19 | #1 |
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V70 Turbo - Overheating
All of a sudden ...
Engine temp has started to go into the red and warning message comes saying high engine temperature and the fan comes on. It is possible to reduce engine temperature by running the interior heating system on full blast (old skool trick) and when doing this, the engine temp gauge goes back to the regular mid temp level (12 o'clock position). On inspecting the engine after it goes into overheat, the water reservoir and hoses do not feel too hot. There is no boiling. When you slowly open the water reservoir cap when hot, the water fills up and overflows. Is this a water pump issue or a thermostat? How much does it cost for a water pump replacement? Last edited by londonboards; Jun 20th, 2019 at 18:46. |
Jun 20th, 2019, 20:37 | #2 |
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Water pump is my guess.
Usually, if thermostat will run cool and go up and down
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V70 P2 2006 2.4 Petrol 170bhp Est SE Automatic (5 speed) MG Midget Mk1 1962 Previous: RR TDV8 3.6 '08; RR TD6 3.0 '02; RR P38A V8 '99; Audi A4 Cab 3.0 V6 2004; Volvo 740 GLE Est 1989 Have VIDA & VXDIAG NANO on W10Pro - happy to help |
Jun 20th, 2019, 20:56 | #3 |
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is the top radiator hose getting hot,it could be a stuck thermostat. If the water pump has failed the rotor part would have to detach from the shaft and volvo pumps are usually 100% reliable. It would be much easier to split the thermostat housing and check the thermostat than start replacing the water pump.
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Jun 20th, 2019, 20:59 | #4 |
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That's true My thermostats have always failed open, but they can fail closed too
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V70 P2 2006 2.4 Petrol 170bhp Est SE Automatic (5 speed) MG Midget Mk1 1962 Previous: RR TDV8 3.6 '08; RR TD6 3.0 '02; RR P38A V8 '99; Audi A4 Cab 3.0 V6 2004; Volvo 740 GLE Est 1989 Have VIDA & VXDIAG NANO on W10Pro - happy to help |
Jun 20th, 2019, 21:08 | #5 |
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I have seen engines and head gaskets replaced before when all that was wrong was a stuck thermostat.It is important to rule out the most obvious and simple faults first. the best thing to do is to run the engine from cold and wait for the thermostat to open and the top radiator hose get hot to prove it is opening.
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Jun 20th, 2019, 21:10 | #6 | |
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Quote:
https://www.youtube.com/watch?v=I6MkBufU8yU&t=53s
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2002 V70 D5 |
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Jun 22nd, 2019, 07:50 | #7 |
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After 10 minutes or so, the radiator bottom hose and the top hose and the water bottle are hot.
Does this point to the water pump? |
Jun 22nd, 2019, 09:40 | #8 | |
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Quote:
You said earlier "the water reservoir and hoses do not feel too hot. There is no boiling." so that sounds more like an incorrect temperature reading to me rather than a real overheating fault.
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V70, 2.4 T5, 2005, Manual. |
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Jun 23rd, 2019, 18:26 | #9 |
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Yes, thanks for that. I will check the temp sensors. I have not had boiling water.
But I do have the condition that when you put the car's interior heating on full blast, you can reduce the temperature back to normal. That would suggest to me that the temp sensors are working. Does that make sense? |
Jul 4th, 2019, 13:05 | #10 | |
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My comments are only based on my opinions and vast experience . |
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