Moin guys. The following problem. Had started a long journey to the east on Sunday (about 700km drive) which I survived without any problems.What was striking was that at high speeds of about 140km/h-145km/h my Swift 1.0l 53PS (Bhjr.93) got a bit “overheated”, i.e. the engine temp. climbed over the half to about 3/4 or so.But this was only short and I hardly noticed it any further,because the temp. again leveled to the half (90 degrees?!) as I did not more faster than 130km/h today when I returned (by sun 25 degrees and not as on Sunday morning at 15 degrees) I immediately noticed that the temp. needle had already risen over half at a long speed of 130km/h and was about 3/4. When I took some gas away (110:20) it fell slowly again to the half. At a longer speed of 130km/h T140km/h it then rose threateningly close to the maximum, but STETS was still under the white section.When I just gave a little more gas again,because I gave the A a bit more gas. The Temp. needle was at the time just before this white area.I immediately took the gas away and the smoke at the back was immediately gone.With the new gas the cloud came back behind me, so that I immediately took the gas away and throttled the speed to 100km/h. The smoke was immediately removed after the gas was taken away and did not come again.The Temp. needle leveled again normal on the half and I drove the remaining 200km only max. 120. Later I tried again high sw. of 130, which were easily feasible. also the temp. did not rise. Of course I did not drive the 130 over a longer period as above, because I was afraid that he would overheat again. My question is now: how is this overheating at the high sw. to explain? where did the smoke come from and how is it to explain? it can be that I have my cylinder-head seal b After my arrival I immediately looked into the cool-balance tank: so there is enough in it and only, which also belongs in it, so no oil. the check of the oil measuring rod showed also no obvious. how can I check my head seal otherwise, if necessary???? I could completely explain the overheating with the cooler, which does not look so great anymore(about 1/3 of the “lamal” or are damaged. About fast help I would be happy!!!!!