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Rattle white smoke

Old 05-14-2014, 07:52 PM
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Kahdmus
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Default Rattle white smoke

2002 C4 Cab. Pulling out, gear popped out of 2nd (normal), car shudders, engine starts rattling, white smoke from right exhaust....

Old 05-14-2014, 08:15 PM
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Ahsai
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That doesn't sound too good. Hopefully it's just a broken AOS.
Old 05-14-2014, 08:17 PM
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What are symptoms of AOS?

It sounds bad! UUgh..my 964 is still waiting for its rebuild! feeling gutted right about now..
Old 05-14-2014, 08:28 PM
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Ahsai
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The same symptoms you described except maybe white smoke should be on BOTH exhaust and not just the right one. One mode of failure of AOS is it sucks the coolant into the throttle body so the coolant burns and appear in the exhaust.

If you're sure the exhaust is only on one side, then it's possible you have a cracked head, which is not common on MkII.

Have you checked your coolant and engine oil for any sign of intermix?
Old 05-14-2014, 08:29 PM
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I thought smoke was only AOS symptom? Loud rattle sounds terrible..
Old 05-14-2014, 08:31 PM
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Don't restart the motor till you get a qualified Porsche mechanic to look at the car.
Old 05-14-2014, 08:35 PM
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waiting for a flatbed to shop....

*sigh*

Just praying a replacement or rebuild isn't necessary. Couldn't come at a worse time...
Old 05-14-2014, 08:52 PM
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Ahsai
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Rattling was most likely due to the non firing cylinder(s). Anyway, you've done the right thing to flatbed it to the shop.
Old 05-14-2014, 08:55 PM
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We are having crazy hot weather today. Gone from 60's to 95. Wondering if the heat would be a factor...
Old 05-15-2014, 12:45 AM
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Dropped car at shop. Turned key to unlock the wheel. Notice that oil level shows maximum (it was half full before) and coolant level light comes on. Code shows a misfire.
Old 05-15-2014, 12:55 AM
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Doesn't sound good at all
Old 05-15-2014, 03:30 AM
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There was a post a while back in the 997 forum, same symptoms, smoke only on one side ( right exhaust, do you mean passenger side?) engine rattle, ended up being cracked piston...
If it is passenger side exhaust, that means left 1-3 cylinder bank (drivers side). The cooling circuit travels through 1-3 bank first and than gets to 4-6 later so if your water pump lost a blade, it would get stuck in 1-3 bank and end up creating a hot spot and cracking the head... Not sure how much rattle there would be though..

How many miles on your car? Did you have the water pump changed?

Sorry to hear this, hope I'm wrong and that it's just a spark plug that stopped firing...

Keep us posted to what happens next...😥
Old 05-15-2014, 03:31 AM
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Duplicate post
Old 05-16-2014, 10:31 PM
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Still waiting on shop...
Old 05-17-2014, 12:05 AM
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Biting my nails....

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