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Valve? Bad Motor?

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Old Oct 19, 2015 | 09:52 AM
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Default Valve? Bad Motor?

So here is what my car sounds like right now...


At the dealership now, awaiting feedback. What do you guys think?

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Old Oct 19, 2015 | 11:28 AM
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That sounds bad like a piece of metal hitting r going around in the valve train.Robert
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Old Oct 19, 2015 | 03:52 PM
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Spun rod bearing...
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Old Oct 19, 2015 | 04:13 PM
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I would say rod bearing, it has that signature rap right at the top of the rev.

How many miles?
Were you beating on it when it started?

Last edited by bob guzzy; Oct 19, 2015 at 04:16 PM.
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Old Oct 19, 2015 | 05:34 PM
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Thank goodness for the powertrain warranty. Please let us know what the dealership concludes. Best of luck!
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Old Oct 19, 2015 | 08:55 PM
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I does sound like a bottom end knock, rod bearing. Is the oil pressure any lower than it normally was?
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Old Oct 21, 2015 | 09:44 AM
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Oil pressure was normal. I was mildly beating it, up between 4-5k rpms about 5 minutes before the sound came. The dealership is tearing it down and said it could be a week for that, then they have to take pictures and send to Chevy on what to do further (replace, rebuild type of decision) It's sitting at 7,664 miles.

The dealership is easy to deal with... but I'm not happy about paying for a Corvette and having to drive a Malibu for who knows how long.

I'll post updates as this plays out.
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Old Oct 28, 2015 | 03:45 PM
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Bearings 5 and 7 failed. I could only really hear 1 tapping, but I guess if 1 fails it would throw enough metal into the motor to cause a 2nd. Sounds like my kinda luck.
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Old Oct 28, 2015 | 04:06 PM
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Originally Posted by shaunmark
Bearings 5 and 7 failed. I could only really hear 1 tapping, but I guess if 1 fails it would throw enough metal into the motor to cause a 2nd. Sounds like my kinda luck.
So are they replacing your engine with a new long block? Sorry to hear about that.
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Old Oct 28, 2015 | 04:08 PM
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if they rebuild your motor you should put forged rods and pistons, crank while they are in the motor. That is what ford did for my diesel while it was getting rebuilt under warranty. I bought the parts and they installed them
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Old Oct 31, 2015 | 08:55 PM
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The dealer will do a should cost to provide a price for repairing the engine. GM will then determine whether or not it better to repair or replace. If GM decides to repair the engine they will only authorize a repair with no changes from stock. Besides the crank and rods are already forged so there isn't much to be gained by going to a forged bottom end.

Bill
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Old Nov 1, 2015 | 01:46 PM
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Kudos to GM for using the cheapest automotive suppliers on a $100K car line!!

Last edited by Black&White; Nov 1, 2015 at 01:47 PM.
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