Hi all
I purchased a 05 C2S with 26k kilometers on the clock. Recently I have discovered a strange issue with the engine temperature. When the car has reached to the optimal temp. While driving on the highway i accelerate fastly to 180-230 km/h range and after driving for around 30 secs to 1 min the engine temperature starts to fall and this wont stop until I slow down and then it starts to rise to its optimal temp. The weather around here is 10 C which I dont believe is not extreme low for this to happen. Anyone experienced the same thing? Or is this normal?

Thanks

 

are you talking oil or water temp? and not sure if it works quite the same at the speeds youre talking about but generally a car will be cooler cruising at 70mph than it is crawling thru traffic at 5mph because more air flowing over/cooling the radiators.

 

I am talking about the water temp. I know it would be cooler in high speeds but I never experienced a car that water temp almost drops to the coolest when accelerated to 200 km/h range.

 

May be a stuck thermostat.......I would get it checked.



Stacy

 

I agree with Stacy, it is a stuck thermostat. The cooling system should divert less coolant to the radiators, since they are more efficient at high speed. Although, an engine pushed at 230 KM/H should generate a very good amount of heat and thus radiators should be used in full. You should definitely look into the Thermostat.

Yves

 

I will take it to shop asap. I hope the termostat can be repaired and it does not need to be replaced.

 

You never repair a thermostat, you replace it.

Yves

 

Just to clarify, unless the prices on Porsche thermostats are completely out of line with other cars, it's a very inexpensive part to replace (~$50). And I would guess under 1 hour of labor for the job.

Most European and Japanese cars I have worked on have "friendly" thermostats that tend to stick in the open state (over-cooling), as opposed to older American cars that stick in the closed state (over-heating, cracked engine heads or blocks) - lost a 1995 Trans Am and a 1991 LeBaron.

Good luck with getting it straightened out!