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Occasional coolant light !

Discuss problems you have had or are having with your Z4
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earthdweller
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Occasional coolant light !

Post by earthdweller » Wed Nov 01, 2017 5:51 pm

I’ve had the coolant warning light cone on twice now .. but only on starting the car having not used it for a couple of weeks

If I turn the car off .. the turn it back on the light does not come back on

I’ve checked the levels etc and can’t see any problems

Any thoughts ?
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ph001
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Occasional coolant light !

Post by ph001 » Wed Nov 01, 2017 6:31 pm

First thing - does the float all look OK and move freely when you remove the cap?

If you are 100% sure you are not losing coolant then you have to assume a sensor problem - this sits on the bottom of the expansion tank, you can see it clearly with the undertray off.

Personally I would add some coolant right up to the max level and see how you go. Any coolant loss is almost certainly a hairline crack in your expansion tank.
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Ducklakeview
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Occasional coolant light !

Post by Ducklakeview » Wed Nov 01, 2017 6:33 pm

Or, perished O rings where the expansion tank fits to the rad, this was my problem..

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earthdweller
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Occasional coolant light !

Post by earthdweller » Wed Nov 01, 2017 7:04 pm

Thanks guys I’ll have a good look and update

But I’m in lanzarote at the mo so it will be next week :thumbsup:
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Ducklakeview
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Occasional coolant light !

Post by Ducklakeview » Wed Nov 01, 2017 7:17 pm

earthdweller wrote: Wed Nov 01, 2017 7:04 pm Thanks guys I’ll have a good look and update

But I’m in lanzarote at the mo so it will be next week :thumbsup:

Typical Z owner, on hols and thinking about the car...

Mike

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Occasional coolant light !

Post by Scooba_Steve » Wed Nov 01, 2017 9:17 pm

:lol:
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Occasional coolant light !

Post by midnightrambler » Thu Nov 02, 2017 2:13 am

My coolant light just came on for the first time. Coolant was low, so I added. Will check it in a couple of days to see if I have a leak.
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earthdweller
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Occasional coolant light !

Post by earthdweller » Thu Nov 02, 2017 8:13 am

As I say it only happens when the car has been left for over a week without being used
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earthdweller
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Occasional coolant light !

Post by earthdweller » Thu Nov 02, 2017 8:16 am

Ducklakeview wrote: Wed Nov 01, 2017 7:17 pm
earthdweller wrote: Wed Nov 01, 2017 7:04 pm Thanks guys I’ll have a good look and update

But I’m in lanzarote at the mo so it will be next week :thumbsup:

Typical Z owner, on hols and thinking about the car...

Mike

Yup ... Cold beer in hand sitting opposite the wife and thinking about the Zed and not the view
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Occasional coolant light !

Post by silverzed » Thu Mar 22, 2018 3:07 pm

hi, I have the same problem, the coolant light comes on when the engine is cold, switch ignition off and on again , the light is off. going to check the coolant level and any signs of leaks this weekend :?

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ph001
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Occasional coolant light !

Post by ph001 » Thu Mar 22, 2018 3:35 pm

It's normally pretty simple - if the coolant is low it's either a crack in the expansion tank or perished o-rings where the expansion tank fits to the rad. If coolant level is fine but you have a light on it's usually the sensor (fitted to bottom of expansion tank).
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Occasional coolant light !

Post by nupespr84 » Wed Jul 01, 2020 3:14 pm

ph001 wrote: Thu Mar 22, 2018 3:35 pm It's normally pretty simple - if the coolant is low it's either a crack in the expansion tank or perished o-rings where the expansion tank fits to the rad. If coolant level is fine but you have a light on it's usually the sensor (fitted to bottom of expansion tank).
I know this is an old thread but thanks for the information. Now I need to by the sensor and replace it or get my mechanic to do it.

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Occasional coolant light !

Post by Mr Tidy » Wed Jul 01, 2020 8:27 pm

nupespr84 wrote: Wed Jul 01, 2020 3:14 pm I know this is an old thread but thanks for the information. Now I need to by the sensor and replace it or get my mechanic to do it.
Wow - top marks for some serious lurking! 1st post more than 7 years after joining. :o

Now you've broken the ice I'm sure an introduction and some photos on the Newbies section would be appreciated. :thumbsup:
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Occasional coolant light !

Post by AveZ4coop » Thu Jul 02, 2020 9:38 am

Mr Tidy wrote: Wed Jul 01, 2020 8:27 pm
nupespr84 wrote: Wed Jul 01, 2020 3:14 pm I know this is an old thread but thanks for the information. Now I need to by the sensor and replace it or get my mechanic to do it.
Wow - top marks for some serious lurking! 1st post more than 7 years after joining. :o

Now you've broken the ice I'm sure an introduction and some photos on the Newbies section would be appreciated. :thumbsup:
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