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4th May 2019, 19:24 | #1 |
Gets stuck in
Rover 75 Saloon Join Date: May 2015
Location: Essen (Oldenburg), Germany
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Coolant loss
Hello guys, for about 1 and a half - 2 months the car's been loosing coolant, about 0.5 to 1l per week... now my question is, which could be the possible most suspect culprits? I am thinking that it could be the thermostat housing, my thermostat has been stuck on open (thanks God haha) since I bought the car lol (almost 4 years ago), and I haven't bothered fixing it since having it stuck on open would always circulate the water through the radiator and the worst and only thing it can happen is, when driving on the highway, you'll have the water a little colder than normal 80-90°C which isn't really an issue. But the interesting thing is, why would the thermostat housig give up now only, aloooot later than the thermostat itself? Maybe it's not that at all, any ideas?
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4th May 2019, 19:53 | #2 |
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Rover 75 Saloon Join Date: Mar 2017
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My car was losing a small drop of coolant every week, thermostat packed up then temp sensor, constantly checking levels for nearly 2 years. Had cambelt, tensioner and water pump changed now absolutely fine. Obviously a very small leak from water pump no sign of coolant loss!
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4th May 2019, 20:15 | #3 | |
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Rover75 and Mreg Corsa. Join Date: Nov 2006
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Quote:
Have you checked the actual running temperature using the trip screen diagnostic? TC |
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4th May 2019, 20:28 | #4 |
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Rover 75 Saloon Join Date: May 2015
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When driving normal, temp gauge is in the middle position. Temp gauge is at about 25% level when driving fast because the air flowing fas in the radiator, so about 80-90°C. Can you please tell me how to check the temp using the trip screen diagnostic? Thanks
And Brunty, I can't really understand what you mean, was your problem the thermostat and temp sensor and now you changed them and it's all right or was it the water pump? Sent from my SM-G950F using Tapatalk Last edited by Rsnail; 4th May 2019 at 20:32.. |
4th May 2019, 20:37 | #5 |
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Describing the temperature gauge needle position by using the clock face will make things clear.
Normal is at 9 0'clock. I guess you mean 6 o'clock in your post. Much too cool.--- |
5th May 2019, 08:54 | #6 | |
I really should get out more.......
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She came off the Longbridge Line on 20-05-2003 The Silver Machine was the 13th of 160 Rover 75's to come off the production line that day and is the 100th of 527 Starlight Silver Rover 75 2.5 V6 Connoisseur SE Auto saloons listed in the build records produced world wide. |
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5th May 2019, 12:57 | #7 |
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Rover 75 Saloon Join Date: May 2015
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Thanks guys. Also, do you know how I can flush the heater matrix as well? I can't seem to locate the inlet and outlet pipes going through the firewall to it
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5th May 2019, 13:26 | #8 | |
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rover 75 1.8 vvc club se wedgwood blue Join Date: Aug 2009
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5th May 2019, 17:53 | #9 |
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Rover 75 Saloon Join Date: May 2015
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Thanks suzublu, very helpful indeed! If I can't do it with the matrix still in place I'll do it like that. But, my question is now, when flushing the coolant through the block drain plug and through the lower radiator hose, isn't the matrix also gonna flush? Notice that my matrix isn't blocked at all now, I just wanna have the whole system flushed before installing a new thermostat. And even if the matrix won't flush when doing as described above, maybe inserting a garden hose in either the top or lower (?) hose of the radiator and forcing water through would do it? Any thoughts?
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4th May 2019, 20:50 | #10 |
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Rover 75 Saloon Join Date: May 2015
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Nope, it's at 7 and a half - 8 am position. But I am trying to figure out here what are the causes of the leakage guys haha, as said, I drove the car with the thermostat stuck on open for almost 4 years and the fuel avarage is at 8.5 l/100km so that's nit a problem, and I don't think the engine got worn by this because I raaaarely drive at high speeds so the water almost never gets to stay cold. And anyways, if the cause is other than the thermostat housing, I'll have the thermostat and the housing replaced soon with a metal one anyway.
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