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Loud BANG from engine @ Highway speeds. Ideas?

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Old 07-15-2017, 04:51 PM   #1
Big Lebowski
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Default Loud BANG from engine @ Highway speeds. Ideas?

30 minutes into my road trip up North I experienced a yet to be explained VERY loud bang from the front right of the car. As I move into the right lane and approach the semi on my right, you will hear a loud BANG! The top was down, and video does not do it justice. It scared the crap out of me...which is why there is a delay in my expletive.

After a few near miss incidents I began running my PDR regularly, so I captured the attached video with the Bang occurring after 8 seconds...it's hard to miss. I apologize, it is not a direct copy as I have no way of doing so where I am.

I saw no road debris ahead of me or behind me after the bang. Nothing came off the truck. No loss of tire or oil pressure. I was initially concerned it had something to do with the dry-sump. When I pulled off at the next exit I fully expected to find massive damage to something or leaking oil everywhere. Nothing. Nothing to the tires, body, engine compartment, underside (that I can see). I'm at a loss as I don't know what happened. The only thing that appears to happen close to that moment is the car shifts from 6th to 7th...

Needless to say, I drove cautiously after that, keeping an eye on all gauges and I never saw anything change. All things considered, the next 5 1/2 hours were uneventfull. Thinking I must have run over something, I felt I had dodged a bullet. But, after watching the PDR footage when I arrived and did not see any road debris, I became concerned something bigger may be going on.

Has anyone EVER had anything like this happen before?

Any insight would be greatly appreciated...


Last edited by Big Lebowski; 07-15-2017 at 04:55 PM.
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Old 07-15-2017, 04:57 PM   #2
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Check to see if you still have boost. Could have been the Supercharger Belt.
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Old 07-15-2017, 05:17 PM   #3
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Check to see if you still have boost. Could have been the Supercharger Belt.
Awesome. I will check that.
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Old 07-15-2017, 05:24 PM   #4
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Thats crazy........Follow up with us.
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Old 07-15-2017, 05:33 PM   #5
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I viewed your video from about 6 seconds in to the noise at 8 and it looks like there may of been something on your passenger side of the road that your tire kicked up. It looks like a small black thing, got to look close/quick to catch it.

Last edited by C7/Z06 Man; 07-15-2017 at 05:38 PM.
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Old 07-15-2017, 05:44 PM   #6
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Car shook so either you were shocked and jerked the wheel or you hit something.
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Old 07-15-2017, 05:51 PM   #7
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At the track once I picked up a piece of small debris in my tire and it launched upwards with enough force to go THROUGH the inner fender and spider-web the actual body. It was LOUD.

Something along those lines is my guess...

If you watch the video closely you can see the image "jump" slightly right before the sound. That makes me think you ran something over, but I can't spot anything on the road beforehand.
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Old 07-15-2017, 06:09 PM   #8
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The bang corresponded perfectly with the 6-7 shift.
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Old 07-15-2017, 06:14 PM   #9
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Quote:
Originally Posted by C7/Z06 Man View Post
I viewed your video from about 6 seconds in to the noise at 8 and it looks like there may of been something on your passenger side of the road that your tire kicked up. It looks like a small black thing, got to look close/quick to catch it.
Yeah, I saw something too.


I have had this kind of thing happen to me as well.
The Michelins are so sticky they will pick up anything and everything and fling it back under the car.
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Old 07-15-2017, 06:15 PM   #10
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"I don't owe you anything, I don't owe you anything...," Foo Fighters, I'll Stick Around

Back on topic. Dude, the "bang" definitely sounded like it was outside the car, and not internal, like the tranny, engine, etc. I agree with the above posts. I looks like you ran over something. If no visible damage, I think you're good.

It could have been worse:

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Old 07-15-2017, 06:24 PM   #11
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It isn't that hot in the upper midwest now or I would suspect a pavement heat buckle occurring as you passed over it. It certainly looked like the car jumped over something.
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Old 07-15-2017, 06:28 PM   #12
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Old 07-15-2017, 07:54 PM   #13
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Quote:
Originally Posted by sTz View Post
"I don't owe you anything, I don't owe you anything...," Foo Fighters, I'll Stick Around

Back on topic. Dude, the "bang" definitely sounded like it was outside the car, and not internal, like the tranny, engine, etc. I agree with the above posts. I looks like you ran over something. If no visible damage, I think you're good.

It could have been worse:

https://m.youtube.com/watch?v=SjBBDJ5OiT0
Lol. Thanks. I needed that!
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Old 07-15-2017, 07:56 PM   #14
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Quote:
Originally Posted by sunsalem View Post
Yeah, I saw something too.


I have had this kind of thing happen to me as well.
The Michelins are so sticky they will pick up anything and everything and fling it back under the car.
I'm only reviewing on my iPad, so I'll take your word for it...and actually hope that's what it was and that's the end of it.
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Old 07-15-2017, 08:26 PM   #15
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I think something hit your targa top. Look at see if there is a chip.
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Old 07-15-2017, 08:28 PM   #16
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Sonic boom?
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Old 07-15-2017, 08:32 PM   #17
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Quote:
Originally Posted by C7/Z06 Man View Post
I viewed your video from about 6 seconds in to the noise at 8 and it looks like there may of been something on your passenger side of the road that your tire kicked up. It looks like a small black thing, got to look close/quick to catch it.
I saw it. I think he hit something.
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Old 07-15-2017, 09:28 PM   #18
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Quote:
Originally Posted by Spacewalker View Post
I think something hit your targa top. Look at see if there is a chip.
It was a convertible, not a targa.
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Old 07-15-2017, 09:31 PM   #19
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Quote:
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It was a convertible, not a targa.
top of the windshield frame then.
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Old 07-15-2017, 10:14 PM   #20
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Quote:
Originally Posted by C7/Z06 Man View Post
I viewed your video from about 6 seconds in to the noise at 8 and it looks like there may of been something on your passenger side of the road that your tire kicked up. It looks like a small black thing, got to look close/quick to catch it.
Quote:
Originally Posted by sunsalem View Post
Yeah, I saw something too.

I have had this kind of thing happen to me as well.
The Michelins are so sticky they will pick up anything and everything and fling it back under the car.
Quote:
Originally Posted by rbartick View Post
I saw it. I think he hit something.
Winner, winner, chicken dinner. Thanks everyone for nudging me in that direction. I finally tracked down a laptop that I could review the SD card on to view at a decent resolution and there is definitely something on the road right befor the BANG. From the looks of it zoomed in, it looks like a bolt or metal spike. Not cool. I did not see it at all.

I was skeptical it was road debris, because it was so LOUD. Crazy loud, but I feel a lot better that knowing that's what it was, and other than a likely scuff somewhere on the underside, it's nothing major. I'll get it up on my lift when I get home, but from ground level everything looks sound.




Metal bolt in 3...2...1
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