Subject: Re: Feedback Author: henrikk : member since February, 2010 : 16 posts Posted on: 2010-03-02 08:52:28

Hi!

This is a plausible explanation between vanos and crankcase vent sludge that freezes.

Explanation 1
The oil pressure in the vanos is about 100 Bar or 1450.38 Psi which is pretty much. Vanos with bad seals affects the oil pressure for the high pressure chamber. This will result in bad valve timing.

The key is the oil vent channel in the vanos. The high oil pressure and leaking seals generate a higher flow through the vent channel. The vent channel is pointing against the valve cover but that is not so important in this case. The important thing is that the oil flow increases through the vanos vent probably because of bad seals. This generates a lower temperature inside of the valve cover. Witch means that gases will condensate before they gets to the oil separator.

The oil supply to the vanos is feed through a hose which is placed outside the engine. In cold climate this will lower the oil temp not much but it will contribute to cool the valve cover.

Important to remember that oil is a very effective liquid to for cooling things down.

After I study the design of the vanos l found that bad seals can very likely have impact on the engine oil pressure. Not 100% sure but the design of the engine seems to have two way oil pressure zones that are depended of each other to work properly ( My best guess)

I think that new seals can improve the engines oil pressure that brings us to explanation 2

Assume that the oil pressure goes up after the new seals is installed. That will create a higher flow of oil vapour against the upper timing chain and chain tensioner. This alone will create a higher valve cover temperature and of course better lubrication. One thing that is important in this case is that the oil comes directly from the oil pump.

Elimination:
Assume that valve cover gasket is leaking. Air and moisture gets in and causes sludge to build up and than freeze. That’s a very good possibility that it can happen.

But what about the cars where the valve cover gasket and crankcase vent is change and still freeze next winter. I pretty sure that the valve cover gasket has nothing to do with it.

I am trying to eliminate other causes than the vanos. We already know that the seals is failing.

I got very little sludge even today after driving a short distance. This is very god news for me. I will monitor the sludge build up for the next few days.

• Feedback - henrikk 2010-02-27 13:39:16 (594 views)
  • Re: Feedback - Rajaie 2010-02-27 13:48:46 (488 views)
    • Re: Feedback - henrikk 2010-02-27 15:09:28 (509 views)
      • Re: Feedback - Rajaie 2010-02-27 23:18:20 (545 views)
        • Re: Feedback - henrikk 2010-02-28 03:15:18 (513 views)
          • Re: Feedback - webhorn4477 2010-02-28 17:36:18 (499 views)
            • Re: Feedback - henrikk 2010-03-01 10:10:37 (453 views)
              • Re: Feedback - Rajaie 2010-03-01 20:35:06 (423 views)
                • Re: Feedback - henrikk 2010-03-02 08:52:28 (448 views)
                  • Re: Feedback - Rajaie 2010-03-03 22:41:49 (459 views)
                    • Re: Feedback - henrikk 2010-03-04 14:09:47 (426 views)
                      • Re: Feedback - Rajaie 2010-03-06 22:43:27 (446 views)
                      • Re: Feedback - henrikk 2010-03-06 14:39:12 (387 views)
                        • Re: Feedback - Rajaie 2010-03-06 22:47:07 (486 views)
                          • Time to solve things out - henrikk 2010-03-07 09:27:24 (457 views)
                            • Re: Time to solve things out - webhorn4477 2010-03-07 16:31:42 (439 views)
                              • Re: Time to solve things out - henrikk 2010-03-08 07:11:21 (414 views)
                                • Re: Time to solve things out - henrikk 2010-03-08 16:12:21 (441 views)
                                  • Re: Time to solve things out - webhorn4477 2010-03-09 15:44:33 (899 views)
                                    • Re: Time to solve things out - henrikk 2010-03-09 17:23:18 (398 views)
            • Re: Feedback - Rajaie 2010-02-28 20:02:31 (451 views)
          • Re: Feedback - Rajaie 2010-02-28 17:35:28 (416 views)
            • Re: Feedback - henrikk 2010-03-01 10:22:35 (470 views)