High water temperature issue

escarolo · 12-07-2010, 05:32 PM

Hi all!

This weekend I really enjoyed my CSL but connecting the A.C. the temperature gauge exceeded 3/4 and almost reached the red zone, even driving into highway, 100-110 kms/h, 35º C outside.

Any idea?

Best regards

NZ_M3 · 13-07-2010, 01:17 AM

I would check the thermostate first - it might be stuck closed or half way open causing the temperature to rise when there's more load on the engine - i.e. the aircon pump going.

Failing that it might be the water pump.

Another thing to check is to see if your fan is engaging - the fan clutch might be worn out and not coming on.

**shimmy** · 13-07-2010, 02:12 AM

Quote:

Originally Posted by escarolo

Hi all!

This weekend I really enjoyed my CSL but connecting the A.C. the temperature gauge exceeded 3/4 and almost reached the red zone, even driving into highway, 100-110 kms/h, 35º C outside.

Any idea?

Best regards

my occassional heat issue is on track only, at 100% throttle and on very hot days ONLY so not totally like yours. The minute i come off the throttle it will be back to norm within one or two bends

let us know if you solve it"

escarolo · 13-07-2010, 07:40 AM

I will change thermostat and fan clutch.

Thanks!!!

shane@mbtech · 13-07-2010, 09:47 AM

Quote:

Originally Posted by escarolo

I will change thermostat and fan clutch.

Thanks!!!

Dont do fan clutch, if its getting hot when moving its not the viscous fan

If however its getting hot when standing, then cools as soon as you drive, I would suggest the viscous fan coupling.

Easiest, cheapest thing is stat as suggested.

escarolo · 13-07-2010, 11:59 AM

Quote:

Originally Posted by lawsy

Dont do fan clutch, if its getting hot when moving its not the viscous fan

If however its getting hot when standing, then cools as soon as you drive, I would suggest the viscous fan coupling.

Easiest, cheapest thing is stat as suggested.

Fan clutch price is not so high, so I prefer to change it. The car has 80.000 kms, so sooner or later I will have to change it.

What about water pump? Should I change it or wait until it fails?

**shimmy** · 13-07-2010, 01:12 PM

Quote:

Originally Posted by escarolo

Fan clutch price is not so high, so I prefer to change it. The car has 80.000 kms, so sooner or later I will have to change it.

What about water pump? Should I change it or wait until it fails?

i changed water pump first even tough £400 as if it fails it could be the end of the engine

12-07-2010, 05:32 PM	#1
escarolo S2 - Picking it up Join Date: Jan 2010 Posts: 41 Casino cash: $1711	High water temperature issue Hi all! This weekend I really enjoyed my CSL but connecting the A.C. the temperature gauge exceeded 3/4 and almost reached the red zone, even driving into highway, 100-110 kms/h, 35º C outside. Any idea? Best regards __________________ BMW M3 CSL Black Sapphire

13-07-2010, 07:40 AM	#4
escarolo S2 - Picking it up Join Date: Jan 2010 Posts: 41 Casino cash: $1711	I will change thermostat and fan clutch. Thanks!!! __________________ BMW M3 CSL Black Sapphire

13-07-2010, 01:17 AM	#2
NZ_M3 S5, Sport On, DSC M-track Join Date: Jun 2008 Location: Auckland, New Zealand Posts: 1,434 Casino cash: $13579	I would check the thermostate first - it might be stuck closed or half way open causing the temperature to rise when there's more load on the engine - i.e. the aircon pump going. Failing that it might be the water pump. Another thing to check is to see if your fan is engaging - the fan clutch might be worn out and not coming on.