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Did water enter the engine and out the exhaust?

 
Old 03-16-2013, 04:17 AM
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Hud99
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Default Did water enter the engine and out the exhaust?

Guys, checkout the video below. At 3:29, water and mud was coming out of the exhaust. Before the water crossing, it seems that a good portion of the air grill was submerged in water. But the Cayenne is still running! Also looks like the event was sponsored by Porsche.

Did the Cayenne ingest water? Is the air intake high enough to prevent water from coming in?

Check out this video on YouTube:

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Old 03-16-2013, 11:05 AM
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steve_Cayenne
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No worries, the exhaust just got an enema!

The engine did not ingest any water, or it would have suffered a horrible case of hydrolock, and that car would be having its engine swapped out!

I think the Cayenne is rated for under 2ft of water fording. Not really built for it IMHO, to many electronics down in the belly, and no snorkelled intake!
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Old 03-16-2013, 11:25 AM
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That's right. Engine still running so no hydro lock. But it's odd that the exhaust puked out water for a few seconds . If the exhaust is sealed and pressure of combusted fumes should keep water out of the pipes, how did the water get in? Strange.
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Old 03-16-2013, 01:09 PM
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You see water draining out of the exhaust after it entered through the partially immersed outlets. Water ingestion stalls an engine instantly...then floods it and causes hydrolock.

It was a stupid PR stunt to pull with a $100K vehicle though...the abrasive grit in that opaque desert soup gets into every unsealed nook and crannie in the undercarriage and starts grinding. I learned this the hard way years ago with my first 4x4. I doubt that the Porsche warranty rep will be impressed with the manual pics on water crossing when they find grit in the prematurely destroyed bushings and bearings. Limit water crossings to nice clean streams; or even better, avoid them.

Last edited by DWPC; 03-16-2013 at 03:20 PM.
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Old 03-16-2013, 01:34 PM
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Or doing dune bashing, with your windows and sunroof open. Learned that the hard way on my last one.

Easy enegh to clean out, but then you start hearing this scratching sound whenever you open and close your windows, and eventually there are vertical lines etched into the glass!
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Old 03-16-2013, 01:46 PM
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And yes, new Cayenne can still dune bash ... apparently!

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Old 03-16-2013, 01:58 PM
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Andy E.
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No water ingestion occurred but simple volumetrics. Basically, the car was idling when it was submerged as the large exhaust tips filled with water. Even at full throttle, I doubt that the volume of the exhaust gases would be sufficient enough to rid the large tips of water. Velocity? Possibly...
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Old 03-16-2013, 04:42 PM
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It's amazing that the entire front air intake grill was submerged (albeit a few seconds) and no water was ingested. In the video the instructor said the door seals are 3 layers and will keep water out. Looks like Cayenne's are well built for offroad use. Can't say the same for bmw X5.
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Old 03-16-2013, 06:55 PM
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Originally Posted by Hud99 View Post
That's right. Engine still running so no hydro lock. But it's odd that the exhaust puked out water for a few seconds . If the exhaust is sealed and pressure of combusted fumes should keep water out of the pipes, how did the water get in? Strange.
Exhaust pressure at idle not that strong. And likely bubbling out through the water.
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