hi all i wanted to ask that after driving the car hard for a while the oil temp gets up to 129C is this normal ???

 

Way too hot.

Likely wont physically hurt the engine as long as you have oil but it is not cooling fast enough. oil temps should stabilize 100-113, my car hovers at 93-102


The operating temp in your car is killing HP

 

exactly as mine

 

thanks for the replies but is there a solution and what is the possible cause for high tem the wether here is 35 max

 

That temperature doesn't sound too high for mashing on it during 35C OATs.

What temps are you seeing during normal driving, that is, if you can.

 

Just a stupid question, is your oil quality high enough and is there too much oil???

 

The 63 engines have additional oil coolers in the front gaurds with their own cooling fan. The cooling fan doesn't even come on until the oil temp reachs approx 130C (depending on model). Normal oil temps around town are 90-110C, continuos hard driving in hot weather can give 140C temps, I have seen 145C as a max temp in extreame driving/high ambient temps.


Some 63's have a air cooler in front of the radiator as well as the fan forced cooler, some have a water/oil heat exchanger with a booster pump (coolant) for high temps with the fan forced air cooler. The oil cooling systems for these engines are pretty over engineered.......I've yet to see one overheat either coolant, engine oil or trans oil!

 

Yes, it's normal

 

around 220°F-228°F = 104.4°C - 108.9°C

 

the most my car hit was 242F thats 117C and thats with abuse non stop for 5 min

 

What was the ambient air temperature?

 

Yes I will agree on that. It's almost impossible to over heat a Merc motor.

 

Almost impossible unless there is a problem.

 

I had a run with a 997TT last night .. weather is around 25degree celcius. After the run, my oil temp is 135 degree.

The car is hot!

 

Drove my for 350 miles today, max temp was 102 degrees.
speeds up to 120
average 63 mph
fuel consumption at 18.6 mpg.

 

Damn the C63s run hot! My Clk55 max temp is 95c when the aux fans kickin. My C36 105c when the aux fans kick.

 

It seems pretty normal...maybe a little too hot...mine runs at about 170-195 F. The engine seems to get pretty hot too...around 170ish F

 

I've put my car through a lot of abuse including back to back runs, and oil temps never exceeded 118 C. Under normal driving conditions, my oil temp is between 92 C to 102 C.

In my opinion, 129 C is too high. Something is not right, you should visit the dealership, and have it checked.

 

215 F at highway speeds for me. That's about 102 C.

 

about 50F to 55F i get my car to that point almost everyday. but for some reason it wont go any hotter. i did try in the summer still the same 242F max.