my csl is overheating

7.77 · 02-06-2009, 11:08 AM

nothing really wrong, except when hardly used on trackdays.

in normal use,there is a little variation in temp: usually the needle of the gauge goes before (when decelerate) the temp logo then it goes a little after when i accelerate.

Yesterday, i was in the track of LA FERTE GAUCHER ( bad track), and the temp was getting hotter and hotter.......limit to the red

if i drive carefully (7000 or 7500 r/mn) the needle is on the 2nd point of the gauge.....and during braking, it cool down rapidly. But when i drive hardly (8000) the needle just doesn't stop to climb the temp gauge

My fan (in front of the watercooler) is running ok (but i don't really know if the speed is correct), and the other (the one in front of the engine) is okay. 30/45 minuts after shuting down the engine, when i start the engine, the temp is still in the middle of the gauge and the fan is still running.

The oil temp is always ok (about 120° when i drive hardly) and never goes higher.

please help me.....thermostat ??? temp sender ?? myself ???? french weather ?????

**shimmy** · 02-06-2009, 02:14 PM

no idea how hot the track was with you but Woppum and I were at Monda in july on a warm day and had the same thing with temp reaching the red after 3-4 hard laps. quickly recovered if off race pace though until next time you put the pedal down

7.77 · 02-06-2009, 04:08 PM

it wasn't a really hot day (24.5 ° outside temp)

NZ_M3 · 02-06-2009, 11:21 PM

Have you checked your coolant reservoir bottle?

Few possibilities:
- Blocked radiator - or an airpocket in the system - bleed your coolant.
- faulty thermostat buy a new one or get a motorsport one that opens at 56 degrees (not very good for road use though)
- Faulty water pump (unlikely though)

If the fan's coming on then your fan switch is fine.

When I track mine the water temp always stays constant, but the oil moves around a bit.

I'd say something's not right if the water temp is moving up and down significantly like yours.

7.77 · 03-06-2009, 07:38 AM

you're right on everything. I will bring it to a bmw dealer. A friend of mine had the same problem with his new Z4M....it was a faulty temp gauge sender.....well...humm...will give you some news in few days

**shimmy** · 20-08-2009, 10:05 AM

Quote:

Originally Posted by 7.77

you're right on everything. I will bring it to a bmw dealer. A friend of mine had the same problem with his new Z4M....it was a faulty temp gauge sender.....well...humm...will give you some news in few days

any news, i have same issue

7.77 · 23-08-2009, 07:42 PM

here:

http://www.cslregister.com/forum/sho...ed=1#post29024

02-06-2009, 11:08 AM	#1
7.77 S5 - Full Throttle Join Date: Dec 2008 Location: france Posts: 284 Casino cash: $4221	my csl is overheating nothing really wrong, except when hardly used on trackdays. in normal use,there is a little variation in temp: usually the needle of the gauge goes before (when decelerate) the temp logo then it goes a little after when i accelerate. Yesterday, i was in the track of LA FERTE GAUCHER ( bad track), and the temp was getting hotter and hotter.......limit to the red if i drive carefully (7000 or 7500 r/mn) the needle is on the 2nd point of the gauge.....and during braking, it cool down rapidly. But when i drive hardly (8000) the needle just doesn't stop to climb the temp gauge My fan (in front of the watercooler) is running ok (but i don't really know if the speed is correct), and the other (the one in front of the engine) is okay. 30/45 minuts after shuting down the engine, when i start the engine, the temp is still in the middle of the gauge and the fan is still running. The oil temp is always ok (about 120° when i drive hardly) and never goes higher. please help me.....thermostat ??? temp sender ?? myself ???? french weather ?????

02-06-2009, 02:14 PM	#2
shimmy CSL Register Uber-poster! Join Date: Apr 2008 Location: Uk Posts: 14,645 Casino cash: $43908	no idea how hot the track was with you but Woppum and I were at Monda in july on a warm day and had the same thing with temp reaching the red after 3-4 hard laps. quickly recovered if off race pace though until next time you put the pedal down

02-06-2009, 04:08 PM	#3
7.77 S5 - Full Throttle Join Date: Dec 2008 Location: france Posts: 284 Casino cash: $4221	it wasn't a really hot day (24.5 ° outside temp)

02-06-2009, 11:21 PM	#4
NZ_M3 S5, Sport On, DSC M-track Join Date: Jun 2008 Location: Auckland, New Zealand Posts: 1,434 Casino cash: $13579	Have you checked your coolant reservoir bottle? Few possibilities: - Blocked radiator - or an airpocket in the system - bleed your coolant. - faulty thermostat buy a new one or get a motorsport one that opens at 56 degrees (not very good for road use though) - Faulty water pump (unlikely though) If the fan's coming on then your fan switch is fine. When I track mine the water temp always stays constant, but the oil moves around a bit. I'd say something's not right if the water temp is moving up and down significantly like yours.

03-06-2009, 07:38 AM	#5
7.77 S5 - Full Throttle Join Date: Dec 2008 Location: france Posts: 284 Casino cash: $4221	you're right on everything. I will bring it to a bmw dealer. A friend of mine had the same problem with his new Z4M....it was a faulty temp gauge sender.....well...humm...will give you some news in few days

23-08-2009, 07:42 PM	#7
7.77 S5 - Full Throttle Join Date: Dec 2008 Location: france Posts: 284 Casino cash: $4221	here: http://www.cslregister.com/forum/sho...ed=1#post29024