[elalona]

i know some one talk about it before but..

in the manual it say normal temp. will be between the 70 and the 170 c
whith is 158 - 338F. dose this make since.. i use to drive my car with a temp. around 100[212F] to 110[230F].. but to day i driving too slow in traffic jam and it went up to 120[248F]...

so any one can till me what should be normal and when i can say my 335 is overheated.....???

if it was just like before blue and a red dash it would be much better...you just dont have to think about numbers... [cold normal hot]

[wj4]

in the manual it say normal temp. will be between the 70 and the 170 c

but to day i driving too slow in traffic jam and it went up to 120[248F]...

I think you are OK because you're still within the normal range stated in the manual.

[teknochild]

ofcourse if your in a traffic jam the heats going to go up, no air

[elalona]

Originally Posted by wj4

I think you are OK because you're still within the normal range stated in the manual.

yes but it was not like that before. My [x-e39]... its stay in the mid no change. also at Extrem driving condtion.

[wj4]

yes but it was not like that before. My [x-e39]... its stay in the mid no change. also at Extrem driving condtion.

So what do you want us to say? That your car is overheating? If you are this concerned...why don't you just take it into the dealership for analysis?

One thing you have to understand is that the 335i is a turbo'd car...everything is hotter in a turbo'd car. You can not compare the likes of a turbo'd car to an N/A one.

In my Evolution VIII, when I'm in traffic, my oil temperature and my EGT aka exhaust gas temperature get very hot as you are gassing up and just waiting there, and continue the process until traffic clears up. You are not going in a consistent speed.

[jmonier]

According to the engine information I have seen the correct upper limit for normal operation is 300F (150 C). At that point the yellow temp warning comes on and it is in "Component Protection" mode where AC and engine power is reduced. At 315F (108C) the red temp warning comes on and it is in "Emergency" mode with engine power reduced to 10%.

The 300F/150C number is shown in the Sedan manual. I believe that the Coupe manual is in error in showing 340F/170C as normal. It doesn't make much sense for the gauge to only go up to 300F/150C if normal is higher than that.

[elalona]

no but the 70-170 range is too big ....

[RMG]

Originally Posted by elalona

no but the 70-170 range is too big ....

Don't worry, everything should be fine. BMW tested this car/engine in the harshest/ hottest conditions possible. Until you're not getting warning signals in the dashboard everything is fine.
PS Make sure you always follow the BMW recommendations regarding the oil grade and quality. I would change the oil more often than recommended. Especially on turbo engines the oil quality and grade are crucial. Stick with Castrol (fully synthetic of course).

[ScheerSpeed]

you have a turbo car, most turbo cars tend to get very hot if they idle for a long time and do not get enough air through the intercooler and radiator. and when you drive a car at high RPM's and fast, you are pushing more air through the radiator, thus the engine is cooled better.

[picus]

You probably can't say whether your old cars temp went up under extreme driving conditions like this one because it is likely your old car was showing you water temp, not oil temp. The manual says the operating range is 338F and you're at 248F, so what's the problem? 120C is the halfway mark on non-US cars.

[jmonier]

Originally Posted by picus

The manual says the operating range is 338F and you're at 248F, so what's the problem? 120C is the halfway mark on non-US cars.

Note my comment above that the manual is in error. The correct number is 300F.

[edgarj]

I'm just getting into the hard break-in period, but I've hit 250C several times in cold weather (40F). It stays put beyont that. I think your temps are well within the norm given the conditions.

BTY, nice avatar pic. A child molester named 'tea bag'. Super classy.

[meeh]

Originally Posted by elalona

yes but it was not like that before. My [x-e39]... its stay in the mid no change. also at Extrem driving condtion.

But on your (x-e39) the gauge is for the water temp, on the 335i isn't the gauge for oil temp?

[RMG]

...and this might be confusing.
Elalona,
The oil temperature is normally higher compared with the coolant temp. The engine control unit for 335 "features a calculation model that takes in account the development of the cylinder head temperature based on load"....."the control system aims to set a higher cylinder-head temeperature (108 C) if the CU determines ECO (economy) mode" ...because a controlled increase in temperature favors slower fuel consumption "as the internal friction is reduced." When more power is needed the Control System reduces the temp to approx. 90 C "thus increasing the engine torque". You should be happy, you're driving an "intelligent" car...enjoy. Plus...in countries like yours where temperatures are ussually very high all manufacturers offer bigger radiators and improved cooling systems. I don't know if this is the case with BMW but what I know for sure is that they tested this car long and hard before selling it to you.

[elalona]

am happy with it...

it's fine .. but i want to know how it works... coz many turbo car have problem's in My country.. the heat is a big problem... it get up to 40C at the night and 49 to 50 at the summer ...

but now its fine 16 to max 25 and it get some time to 10...

[stressdoc]

The water temp gauges on most modern cars are set to give as little data as possible, they just go up to mid-way and stick there unless something truly dramatic happens. The temp guage is just a glorified idiot light. The oil temp gauge on the 335 is a different story, it gives precise data. The problem with such information is that it generates anxiety -- owners fret over whether the car is 'overheating' when the gauge reads beyond the half-way mark, because they are used to the dumbed-down gauges.

Bottom line: do not worry unless you get to 300F/150C, at which point I would take measures to reduce engine load (reduce speed if travelling fast, turn off AC, head for shade, etc.). "Normal" operating temp for my car is 220-240F.

[jmonier]

Originally Posted by stressdoc

Bottom line: do not worry unless you get to 300F/150C, at which point I would take measures to reduce engine load (reduce speed if travelling fast, turn off AC, head for shade, etc.). "Normal" operating temp for my car is 220-240F.

The Engine Management System does that for you. At 315F you have only 10% engine power available.

[stressdoc]

Originally Posted by jmonier

The Engine Management System does that for you. At 315F you have only 10% engine power available.

I would take pre-emptive action before that point.

[sdiver68]

I've seen 260, no worries here. As others have said above so I won't repeat, the BMW engine temp gauge is different in a couple of ways from other manufacturers.

[Adham]

i really like having a temp guage that actually works. the temp guage on my e46 was worse than useless, it stuck in the middle and would just shoot over to the red if there was a problem.

[teknochild]

is this like the fith time this has gotten moved?