Hi all,
Along with the roof problems I've listed in my other post today, the coolant temperature has been fluctuating wildly. The car is a 2001 1.6 16v 206cc
Today I checked the levels and it was fine. Thinking it may be a blockage etc. I opted to do a full flush and replace with new coolant. Did all of this only for the problem to remain.
Next thing to check was the thermostat. Removed it and tested it I. Boiling water, it opened and closed just as you would expect. When re-inserted the problem continued, so I removed it (keeping the rubber seal in place) and re-assembled, topped up and bled the system. Touch wood it was fine again on my drive home.
Is it likely it was the thermostat, or a, I missing something else? Going to replace the thermostat as soon as I get chance anyway, but just wanted to check.
Finally, yesterday the oil temperature gauge lit up momentarily, and again today, but only briefly. The oil is fine bad all levels good... Any ideas?
Many thanks in advance,
James
Coolant temperature issues
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Capncol
- Posts: 3761
- Joined: Fri Nov 11, 2011 12:40 pm
- Location: Reading & Southampton
Re: Coolant temperature issues
I agree. Sounds like stat
Cheers Col.
206cc 1.6ltr (Wifes toy)
Mercedes ML (workhorse)
Corvette C3 (my toy)
When requesting help of a technical nature, please give as much detail of the fault as possible along with details of exact model, engine size & type, gearbox, year, mileage, and any relevant work carried out to try to solve the problem to help us help you.
Better still, put the details in your signature.
206cc 1.6ltr (Wifes toy)
Mercedes ML (workhorse)
Corvette C3 (my toy)
When requesting help of a technical nature, please give as much detail of the fault as possible along with details of exact model, engine size & type, gearbox, year, mileage, and any relevant work carried out to try to solve the problem to help us help you.
Better still, put the details in your signature.
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Jamesk07
- Posts: 39
- Joined: Sun Feb 02, 2014 8:10 pm
Re: Coolant temperature issues
Hi Capncol,
Much appreciated! Eurocarparts tomorrow it is!
Many thanks,
James
Much appreciated! Eurocarparts tomorrow it is!
Many thanks,
James
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Karrot
- Posts: 120
- Joined: Fri Nov 29, 2013 5:31 pm
- Location: Durham City
Re: Coolant temperature issues
The Oil temp gauge is also a fill level gauge when you first turn on the ignition. It should light up and show the fill level, then dim and drop to start showing oil temp after a few second.
+1 for stat.
K
+1 for stat.
K
As long as water isn't falling out of the sky, the roof can be down.
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Rivis
- Posts: 93
- Joined: Mon Dec 09, 2013 8:30 pm
- Location: Surrey
Re: Coolant temperature issues
I didn't know that, must check tomorrow.Karrot wrote:The Oil temp gauge is also a fill level gauge when you first turn on the ignition. It should light up and show the fill level, then dim and drop to start showing oil temp after a few second.
+1 for stat.
K
On mine the oil level is shown in the trip/mileage indicator, after switch on it firstly shows the miles to go to the next service, then the oil level (for 10 secs), before finally showing the trip/mileage.
John
Silver 206cc Allure HDi 1.6 [2006]
Silver 206cc Allure HDi 1.6 [2006]
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GrandadMonkey
- Posts: 3583
- Joined: Thu May 04, 2006 8:00 am
- Location: Leicestershire
Re: Coolant temperature issues
Not according to page 30 of my owners manual. Mine works the same as Rivis' does. The oil temperature gauge indicates the oil temperature only.Karrot wrote:The Oil temp gauge is also a fill level gauge when you first turn on the ignition. It should light up and show the fill level, then dim and drop to start showing oil temp after a few second.
+1 for stat.
K
Where did you read what you said Karrot?
Ron
"If it ain't broke don't fix it!"
Golf 1.5 Tsi Evo SE Nav Estate Atlantic Blue
Polo 1.0 SEL DSG Reef Blue (wife's)
(Previously owned a 2005 206CC 1.6 Allure Moonstone for 10 years)
"If it ain't broke don't fix it!"
Golf 1.5 Tsi Evo SE Nav Estate Atlantic Blue
Polo 1.0 SEL DSG Reef Blue (wife's)
(Previously owned a 2005 206CC 1.6 Allure Moonstone for 10 years)
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gazza82
- Posts: 2129
- Joined: Sat Apr 23, 2011 8:41 pm
- Location: Buckinghamshire, UK
Re: Coolant temperature issues
2.0 litre version might be different ... ours is level and temp unit combined.
It's no substitute for the dip stick though!
It's no substitute for the dip stick though!
Family Fleet: ex-Cayman Green 206 CC 2.0 LE, Indigo Blue 206 1.4 HDi Hatchback, Subaru BRZ Auto, Alfa Romeo MiTo
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Karrot
- Posts: 120
- Joined: Fri Nov 29, 2013 5:31 pm
- Location: Durham City
Re: Coolant temperature issues
Figured it was standard across the range. My old 306 was the same.
K
K
As long as water isn't falling out of the sky, the roof can be down.
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Jamesk07
- Posts: 39
- Joined: Sun Feb 02, 2014 8:10 pm
Re: Coolant temperature issues
Hi chaps,
A quick update:
Car went to my good friend's garage yesterday and he very kindly fitted a new thermostat and thermistor (blue clipped temperature sensor to the right of the block and to left of the battery). He sorted where the small coolant leak had previously been, cleaned the area and re-assembled confirming no leaks at all. He then ran diagnostics on the car again, but the coolant temperature error was still apparent. He only charged me £35 to supply and fit, so was very grateful indeed!
He says the next step is to take an oscilloscope to the wiring and check what's going on as he is 100% certain that a) the engine is not overheating at all b) is working perfectly well and c) all sensors in that area are just as they should be. He suspects a false reading is being sent to the dash, which explains why the coolant temperature gauge rockets from normal to through the roof in a second with the big 'STOP' light coming up, to normal again for no reason. Clearly water/coolant cannot heat up and cool down that quickly.
Has anyone experienced these symptoms before and do they have any suggestions as to a) what the fault is and b) what the fix is? Any help gratefully received...
Many thanks,
James
A quick update:
Car went to my good friend's garage yesterday and he very kindly fitted a new thermostat and thermistor (blue clipped temperature sensor to the right of the block and to left of the battery). He sorted where the small coolant leak had previously been, cleaned the area and re-assembled confirming no leaks at all. He then ran diagnostics on the car again, but the coolant temperature error was still apparent. He only charged me £35 to supply and fit, so was very grateful indeed!
He says the next step is to take an oscilloscope to the wiring and check what's going on as he is 100% certain that a) the engine is not overheating at all b) is working perfectly well and c) all sensors in that area are just as they should be. He suspects a false reading is being sent to the dash, which explains why the coolant temperature gauge rockets from normal to through the roof in a second with the big 'STOP' light coming up, to normal again for no reason. Clearly water/coolant cannot heat up and cool down that quickly.
Has anyone experienced these symptoms before and do they have any suggestions as to a) what the fault is and b) what the fix is? Any help gratefully received...
Many thanks,
James
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Rivis
- Posts: 93
- Joined: Mon Dec 09, 2013 8:30 pm
- Location: Surrey
Re: Coolant temperature issues
I've experienced a sudden rise in temperature and the STOP light coming on then it going away. I had the codes read last weekend, they indicate a short circuit in the wiring. It's going back into the garage for a proper check over on Thursday and I'm hoping they will get to the bottom of it.Jamesk07 wrote:Has anyone experienced these symptoms before and do they have any suggestions as to a) what the fault is and b) what the fix is? Any help gratefully received...
So get your codes read first, it will give an indication of the areas to explore rather than changing components randomly.
Last edited by Rivis on Fri Feb 14, 2014 2:37 pm, edited 1 time in total.
John
Silver 206cc Allure HDi 1.6 [2006]
Silver 206cc Allure HDi 1.6 [2006]
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Jamesk07
- Posts: 39
- Joined: Sun Feb 02, 2014 8:10 pm
Re: Coolant temperature issues
Thanks Rivis,
The code (which I don't have to hand but was printed out for me) indicated a problem with the temperature sensor. But like you, my car is going back in for more in depth examination as he said short circuiting could be a reason for this...
I'll keep you posted,
James
The code (which I don't have to hand but was printed out for me) indicated a problem with the temperature sensor. But like you, my car is going back in for more in depth examination as he said short circuiting could be a reason for this...
I'll keep you posted,
James
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gazza82
- Posts: 2129
- Joined: Sat Apr 23, 2011 8:41 pm
- Location: Buckinghamshire, UK
Re: Coolant temperature issues
When our hdi did that (temp shooting to top and obviously not) the temp sensor was replaced. Have they fitted to right one?
Family Fleet: ex-Cayman Green 206 CC 2.0 LE, Indigo Blue 206 1.4 HDi Hatchback, Subaru BRZ Auto, Alfa Romeo MiTo
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Jamesk07
- Posts: 39
- Joined: Sun Feb 02, 2014 8:10 pm
Re: Coolant temperature issues
Yeah, originally they were sent the wrong sensor which didn't fit, but he has checked and double checked and it's absolutely the correct one. Hopefully some further testing will determine the problem!
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Capncol
- Posts: 3761
- Joined: Fri Nov 11, 2011 12:40 pm
- Location: Reading & Southampton
Re: Coolant temperature issues
Take it for a drive with the sensor disconnected. If it still reads a temp, then it's the wrong sensor changed. If temp doesn't read then shoots up, it indicates a wiring fault.
Cheers Col.
206cc 1.6ltr (Wifes toy)
Mercedes ML (workhorse)
Corvette C3 (my toy)
When requesting help of a technical nature, please give as much detail of the fault as possible along with details of exact model, engine size & type, gearbox, year, mileage, and any relevant work carried out to try to solve the problem to help us help you.
Better still, put the details in your signature.
206cc 1.6ltr (Wifes toy)
Mercedes ML (workhorse)
Corvette C3 (my toy)
When requesting help of a technical nature, please give as much detail of the fault as possible along with details of exact model, engine size & type, gearbox, year, mileage, and any relevant work carried out to try to solve the problem to help us help you.
Better still, put the details in your signature.
-
Jamesk07
- Posts: 39
- Joined: Sun Feb 02, 2014 8:10 pm
Re: Coolant temperature issues
Hello all,
Thank you again for your help this last couple of weeks, it's been invaluable.
After doing as you suggested Capncol, the problem was still there (coolant temperature needle rocketing, 'STOP' warning flashing. This happened after 10 seconds of the car being on, or 10 minutes, there was no rhyme or reason. Long story short, the car went back into the garage yesterday for some thorough analysis. Turns out there had been water ingress into the ECU which was causing the problems I've been experiencing. So, a thorough clean out and drying of the ECU (it was filthy in there so was obviously historic), and changing another sensor which brings on the fan has done the trick. I took the car out last night for a 40 mile run and it didn't miss a beat. I am very happy.
James
Thank you again for your help this last couple of weeks, it's been invaluable.
After doing as you suggested Capncol, the problem was still there (coolant temperature needle rocketing, 'STOP' warning flashing. This happened after 10 seconds of the car being on, or 10 minutes, there was no rhyme or reason. Long story short, the car went back into the garage yesterday for some thorough analysis. Turns out there had been water ingress into the ECU which was causing the problems I've been experiencing. So, a thorough clean out and drying of the ECU (it was filthy in there so was obviously historic), and changing another sensor which brings on the fan has done the trick. I took the car out last night for a 40 mile run and it didn't miss a beat. I am very happy.
James