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Popular Content
Showing content with the highest reputation on 07/19/2017 in all areas
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In the case of my faulty CCV, high side pressure was slightly low but low side was clearly too high (it should be 20-35 psi or so). This is consistent with what you are seeing. Your low side pressure is even higher than what I was seeing but this could be explained by your higher ambient temperature or it could be that your CCV is simply in worse shape. Does your rear A/C work? There are two expansion valves with the 4-zone climate control, one for front and one for the rear. I would expect that both expansion valves would have to be blocked to cause what you are seeing. Considering the damage that the lines sustained, I guess this isn't out of the question. The front expansion valve is underneath the passenger's side wiper. It's fairly easy to replace. I tried replacing the expansion valve first when I was diagnosing the problem with my car. It wasn't the problem. I think a faulty CCV is a reasonable guess in your case but it could really be anything considering the fact that the valves were so badly mangled and debris could be anywhere within the system. Good luck! Brett1 point
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Duncan is correct. When you hear cam follower/lifters tapping, you have excessive metal to metal bounce contact because the lifter hydraulic system is not keeping them in contact with the cam lobes. Over time, that will lead to both lifter "mushrooming" and wear on the cam lobes themselves, which are only soft cast iron. Valve train noise is not your friend.1 point
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If that's the true cause, that means the oil pressure is lower than designed (which makes some metal parts tap). You question will be the same as asking what would happen if I keep driving the car if it's oil pressure is too low.1 point
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My shop, and others, have encountered noise and VarioCam problems on cars equipped with the DOF, which went away when the oil line off the cylinder head was disconnected and plugged. The exact reason this happens to some installations and not others is not clear, but as oil circulation in these cylinder heads is already a known issue (usually the result of either "varnish" build up or debris in the rather small oil passages found in the heads and particularly in the cam followers or lifters) low oil flow is suspected. So while you may have decent pressure as measured at the oil sender, the actual flow rates inside the cylinder heads may not be adequate, resulting in noise and/or insufficient oil to operate the VarioCam components correctly.1 point
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Yours would not be the first one.............1 point
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I was looking at 2010 turbos, until I found a 2012 with the color (exterior/interior) and all the other options I wanted. It cost $10,000 more than the 2010, but I felt having a 2 year newer MY was worth it. 18,000 miles. Car looks new. Was literally owned by a little old lady who only drove it on Sundays. Here is where I bought it. Ask for Larry . . . http://www.ultimomotors.com/inventory/used-2012-porsche-panamera-turbo-all-wheel-drive-hatchback-wp0ac2a74cl0906011 point
