Camshaft deviation M48.51

  • Hello Cayenne community

    My icarsoft tester has recently displayed a camshaft deviation of 6.75 degrees on bank 1.

    A deviation of 3.00 degrees is displayed on bank 2.

    The value on bank 1 seems too high to me.

    Does anyone have values that should still be within tolerance for the V8?

    Thanks and regards to the forum

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  • Hi Jens,

    My guess:

    As long as the horror light (aka MKL) is not illuminated, this is probably still within reason.

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  • Hi there,

    I think I once read here that the camshafts should be at 0 degrees when the timing is correct. Maximum 3 degrees offset.

    I'll take the VD down soon and check the timing. At 230tkm, the timing chain has already been through a lot.

    Greetings Jens

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  • Yes, you're right. The chain will probably be a tad too long. I'll see what my angle is like when I get the chance (150Tkm)

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  • Hello friends

    The Mil lamp only comes on from 12 degrees deviation on a bench. But you don't have to change the chain immediately. You can adjust the deviation on both banks. It takes about 5 hours because you have to fiddle a lot. If anyone has specific questions on this subject, please let me know

    Lg Paul

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  • Hello

    So is a camshaft misalignment of just under 7 degrees on cylinder bank 1, as in my case, still within the tolerance range and not serious at 230000km?

    My first Cayenne was a 2005 S model with 340hp and a good 210tkm

    There was a little more adjustment and the first workshop where the timing was checked said that the chain could soon jump because it was too long.

    Afterwards it turned out that the chain wasn't that long after all when I went to an engine repairer.

    It would have been enough if they had just changed the camshaft phaser + filter.

    And I was at a Porsche specialist garage!


    Greetings Jens

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  • That's the problem. The workshops want to change the chain straight away. The chain is so stable. What deviation do you have on the other bank? So up to 6.5 degrees it is completely harmless. If it gets more, it's best to readjust the bevels and adjust the deviation. This means, as I have often had, that the deviation on one bench was over a degree and on the other bench only 2 degrees. In these cases, I have corrected the deviations by readjusting the bevels and the deviation, for example, from 7 degrees +2 degrees on the other side is 9 degrees. With the new settings, I then have 4.5 degrees on both benches and everything is fine

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  • My engine has done 310000 km and runs like crazy. My brother has 280000km and no problems either. I'm even surprised that the cylinder surfaces don't have any cracks, which is very rare given the mileage, and compression on all cylinders is 20 bar. So the engine is top

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  • ...I have a deviation of exactly 6.75 degrees on bank 1 and my tester shows 3 degrees on bank 2.

    Of course, I can't judge how accurate the values are as it's just an average diagnostic device from icarsoft for €200, but that's enough for me at the moment.

    However, I would like to get Piwis again so that I don't have to drive 120 km and make a long appointment at the service center.

    But as I've already read several times, you have to be able to handle and operate Piwis.

    The Porsche software is supposed to be quite complex.

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  • My engine has done 310000 km and runs like crazy. My brother has 280000km and no problems either. I'm even surprised that the cylinder surfaces don't have any cracks, which is very rare given the mileage, and compression on all cylinders is 20 bar. So the engine is top

    Do the V8 engines in the 957 model, i.e. M48.00 and 48.51, still have problems with piston skipping?

    That was already a sensitive issue with the 955.

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