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 Posted: Sat Jul 14, 2012 10:37 am |
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Joined: Feb 20, 2010
Posts: 26
Trade Rating: 0
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My temp usually stays at 70-80 C, but i noticed that after i shut the engine say to pump some petrol and switch on again, i noticed the temp goes up to 90 C. Is this normal?
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Posted: Sat Jul 14, 2012 11:49 am |
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Joined: Aug 19, 2011
Posts: 619
Trade Rating: +2
Location: Wiltshire
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Common sense tells me no, as a car shouldn't get hotter if the engine is not running.. could be a faulty temp sensor.
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| Project Low and Slow.. Going Euro for 2013. Keep your eyes peeled, big plans ahead..
See my project here. | |
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Posted: Sat Jul 14, 2012 12:17 pm |
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Joined: Jun 10, 2011
Posts: 156
Trade Rating: +2
Location: Tamworth, Staffordshire
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I'd say it's normal, a cars engine doesn't instantly cool down when the engine stops and because there's no air passing through the radiator (as well as the water isn't circulating) the engine is no longer being cooled hence the temperature increase.
At least that's my logic since every car I've owned increases the temp for a short period of time after being switched off.
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| Now a 2010 Renault Megane Coupe owner | |
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Posted: Sat Jul 14, 2012 1:04 pm |
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Joined: Aug 04, 2011
Posts: 1343
Trade Rating: 0
Location: Swindon
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+1 normal. The engine heat is soaking into the coolant. "Heat soak." It is normal.
In normal driving conditions open road / traffic lights / open road the temp can go up by 7 or 8 degrees before the thermostat reacts and then when the cold water hits the engine it can drop by 12 or 13 degrees before it closes.
To avoid people worrying a lot (most) modern cars have the temp gauge fed by the ECU and not direct by the sensor. In this scenario the gauge is usually damped so that it does not move even though the temperature of the water at the sensor is fluctuating.
The 206 is NOT one of those cars so the gauge represents the water temp not what the ECU wants to show you.
NOTE: That is why a lot of the latest modern cars have a fan that will continue to run after the engine is switched off. Most drivers don't get to witness this but if you do a motorway thrash (usually takes several miles at 100+) then stop and switch off you will hear it.
I am not sure if the diesel 206s do this but my company diesel Focus does as does my company diesel Vauxhall Insignia.
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| Morris 1000, Austin 1100, Escort Mk2, Fiat Mirafiori, Alfa 33, Alfa GT Junior, Alfasud, Alfetta GTV (2x), Alfa 164 3.0 V6, Alfa 164 2.0, Alfa 75 V6, Alfa 156 2.4 (diesel remapped 200bhp), Alfa 147 GTA (3.6 295bhp), Alfa 159 (diesel remapped 245bhp 300ft.lbs @ 2500rpm)
Why isn't my daughter an Alfaholic? | |
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Posted: Sat Jul 14, 2012 2:59 pm |
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Joined: Feb 07, 2010
Posts: 2949
Trade Rating: +6
Location: Athens, Greece
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Eerm..
The water pump stops circulating > heat soak > temp rise
Totaly normal for decades on every vehicle, it can get as high as 100 C then drops quickly
once the engine is running again and pump is turning.
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| 1.4i, 2001, 3-door, China Blue
Repair safely - Drive safely | |
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Posted: Sat Jul 14, 2012 4:19 pm |
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Joined: Oct 19, 2011
Posts: 35
Trade Rating: 0
Location: Liverpool
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It's normal, especially on petrol engines.
The running temp on mine was always around 90 (sometimes 85, some other a little bit more than 90), but after turning the engine off it went up to 100; switching the engine on again it went back to 85-90.
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