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-   -   Temp rise when high engine load normal? (http://986forum.com/forums/boxster-general-discussions/16796-temp-rise-when-high-engine-load-normal.html)

motoadve 05-16-2008 11:15 AM

Temp rise when high engine load normal?
Today temepartue was 80 F, I had air conditioning at max.
The car is a Cayman S manual

Drove a 25 mile section of twisties (deserted , no cars) was pushing it, mostly second gear sections , then second gear uphilll twisties, sometimes third, but always changing gears at 6500 or 700 rpms.

During the middle of the uphill the needle of the temp rised to the second marker, I continued pushing it and having fun, and temp continued there, rised a tiney bit past the marker, then the downhill came and temp went back to normal.

I think this car is made for this type of driving, and Im surprised of the temp rise, is this normal?

Any harm to continue driving fast with the temp at the second mark in the gauge?

Also I have done this route many many times with my Triptronic 2.7 Boxster and Temperature never moved from center.

Now page 86 of the Cayman S owner manual says.

Pointer in the middle-normal operating temperature.
The pointer might move up to the red area when engine is heavily loaded and outside temperature is high, but should return to "normal" when engine load is reduced.

According to the manual seems ok a rise in temp if the engine is heavily loaded, as long as it goes down.
Also talked to a couple of reputable mechanics and both told me its ok to keep driving hard as long as the temp needle doesnt reach the red area.

Paul 05-16-2008 04:18 PM

The owners manual tells the story.

Any chance your radiators are dirty?

I ran up 89A to Flagstaff in 100+ degree weather last summer and my temp gauge went up about 3 needles width.

motoadve 05-16-2008 05:51 PM

Actually the bottom part of the right radiator was pretty dirty, and many of the fins of both radiators are bent, more than 50% of both radiators.

I susposse there is a fix for this right?

motoadve 05-16-2008 06:08 PM

Im not too worried about the track, because you get some speed , use 3rd and 4th gear, even 5th gear.

This mt road is uphill second gear tight turn after turn, high G load turns and not enough straihgts to even put 3rd gear., as soon as the section opened up and I put 3rd (after 20 minutes of tight climb, the car went back to normal, still is not too comforting to drive with the gauge at the second position, it spoils the fun for me, and is distracting looking at the gauge all the time.

Paul 05-17-2008 07:19 AM

Could you post a picture of your radiator fins?

motoadve 05-17-2008 12:14 PM

Here are some pics of both radiators

Brucelee 05-17-2008 01:01 PM

No problem. In fact. push it harder! Keep it at 7K minimum.

Good for you, good for your car.


Brucelee 05-17-2008 01:02 PM

PS- if you coolant is at say 225, given this type of driving, you oil is likely over 300.

Keep that oil clean! :)

motoadve 05-18-2008 09:05 AM

Went for a drive yesterday and today in the mountains, temp was in the 70's up to 80 .

Temperature never moved from center, so I think everything is ok

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