Cyberjabato siento decirte que el picado de biela no se va con gasolina de 98. En según que circunstancias puede paliar algo, pero en tu caso (y el mio, tengo una 1150 gs) no ya que no se trata de detonaciones por compresión + calor.
El picado de bielas de las bmw boxer se produce fundamentalmente por depositos de carbonilla que se depositan en la culata y se ponen incandescentes. Estos depósitos se producen en parte por el consumo de aceite habitual en las boxer.
En la revisión de bmw tampoco te lo van a solucionar. Quizas cuando salgas no lo haga porque ese día hace menos calor, pero cuando vuelva.... tate
Si te consuela, muchas lo hacen... (mal de muchos, consuelo.....)
He leido en otros foros que hay una solución que consiste en inyectar agua en los cilindros mientras el motor está en marcha. Te adjunto el post aunque está en ingles:
My '02 GS has had a pinging moderate problem for several thousand miles. It has 21K now. This summer it pinged like crazy during my trip to the Sierras during high, hot, uphill runs while fully loaded down. I ran some Techron through it with negligible results. The pinging seemed to quit after I got home, due mainly (I think) to the fact that the weather has been cooler and I haven't been dragging my camping gear around. I asked my local dealer about it. He shrugged his shoulders and said, "They all do that." Last weekend the weather was a little hotter than normal and the bike pinged significantly while in the mountains. Dammit!
I decided to try the water torture when I got home. I removed the vaccuum line on the right side and attached a length of tubing. I warmed up the bike, then set the choke. The rpm was at about 2000. I stuck the free end of the tubing into a pot of water for about a second, then removed it. The bike bogged down but continued to run, roughly. I goosed the throttle a few times and the engine returned to normal. I repeated this technique about six times, then moved to the left side. I did the same thing on the left side, but stopped after the second "sip" of water. The bike sounds horrible when it bogs down and it became too much for my fragile psyche. I rode the bike around the block to make sure it was not broken, then put it away for the day.
Sunday I jumped on the bike to check the results. Almost immediately it became evident that the bike was running better. It was smoother, quieter and had better throttle response at high rpm. The difference was remarkable. I got to the mountains and tried to get the bike to ping. The pinging was reduced, but still evident. As I played around with it I noticed that the pinging was only coming from the left cylinder! This discovery excited me greatly because I knew I had done only a cursory water torture on the left side.
I returned home and re-did the water torture on the left side. I decided to try be a little more accurate with my measurements. I measured a half-cup of water into a beaker and did the left side again. I used up the half-cup of water in six one-second sips.
Yesterday I took the bike back out to the mountains. The pinging is GONE. As in absent, missing, not present. I could not get the bike to ping at any rpm / speed / throttle / heat / hill combination. It was nothing short of amazing. Full throttle roll-ons at any rpm are no problem. Full power roll-ons at any rpm, in 90 degree heat, at 4000 ft elevation, uphill are no problem. It is unbelievable!
I highly recommend this procedure to anyone who has a pinging problem. I think a half-cup of water per side ingested in approximately six sips is adequate.
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There was a question rasied a while back about carbon chunks causing vave seat damage. Long before the water torture technique came up, I had a big time pinging problem. After running Techtron, it would subside for a while. More importantly though, I could hear chunks a carbon rattling around when pushing the engine hard. They would break loose bang around a bit and fly out, leaving quiet behind.
After 20,000 miles, or so, and subsequent lose of some power, BMW did a leakdown and found damaged valve seats. A combination of pinging and oil use prompted the testing under warranty (any threads ago). So I do wonder if the water torture could produce similar results. After blowing chunks repeatedly, whats the chance of carbon crystals jamming the works and causing damage? I dunno...
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