68Stang

Well. This was no fun. While goong home after meeting with some corvette friends the night went chaotic. Around 1500-2500 rpm I experienced a huge backfire. My rear view mirror was lit up in an orange glow. When I looked forward I noticed all gauges at 0. Restart was futile. Coolant was on the ground beneath the car after I pulled over. No oil trail. No oil soaked exhaust tips. Pulled the manifold and a ton of coolant came put of it followed by pieces of piston. All valve stems accounted for (wcch stage 2 heads). Heads are still on the car. So no idea regarding the chaos in the combustion chamber /cylinder. Pics to follow.

68Stang

MSD manifold. Just behind where tb mounts.


Chocolate milk anyone?


Can anyone read this plug?

t&t moyer

Ouch...............

jnv255

Kablamo.. Wish I could help, but the motors gonna have too be taken apart. Hate it for you man.. Sorry dude

pewter99

damn.....

pewter99

fubar

68Stang

Yeah. I'm pretty sure this block is going to be a coffee table in its next life.... as much metal ended up in the intake and seeing it in a few intake ports I think it's probably a goner. Seeing all the coolant in the intake and the fact the passenger side motor mount is saturated (but no smoke show during the incident) makes me think the block is cracked.

kenw

Very sorry. At least it should not be dropped valve.

mtomlin1

So sorry to hear about this, hopefully you can determine what cause is, just out of interest what modifications have you done to you car prior to this happening ?

68Stang

Sorry. I intended to post this. Wcch stage 2 heads. Cam. MSD manifold. Lg super pro headers. Corsa. Vararam.

mtomlin1

Not far off my set up

I have

ARH headers , msd , nw102 , k&n , btr stage 3 cam , stock heads just reworked valve guides and new stainless exhaust valves

Scary stuff I thought once the heads have been reworked this kind of stuff shouldn't happen.

Unless you had some catastrophic failure somewhere, appreciate it doesn't look like a dropped valve.

Sorry for your pain!

mtomlin1

What was oil pressure like before this happened?

Do you think it Seems possible that oil starvation was to blame ?

68Stang

I don't think this has anything to do with valve drop. All stems are visible. Springs all look ok. The valve heads may be a different story.

68Stang

Oil pressure at that moment.. I have no idea. It was all reactionary. I was focused on getting off the highway safely. I do know all temps were what I'm used to seeing. ~180 oil and slightly higher coolant.

dmuellenberg

Reworked heads should prevent a dropped valve, but it isn't a cure all for all problems. There are other reasons for losing a piston.

DaOtherOne

LS7

JOSEPH_KUWAIT

I want to buy one soon. But iam afraid of this happening.. maybe a grand sport is better for safety and it's look as good.
And sorry for your vette

Dan_the_C5_Man

Sorry to hear this.

How many miles on the motor?

How many miles since the mods / tune?

How much power did it make after the tune?

Did you get an AFR print out after the dyno tune?

What was the target AFR?

Was the car tracked (road course) our other?

Gary '09 C6

wow...ugly, for sure.

mtomlin1

Even if they do go bang from time to time I couldn't ever settle for a grand sport over one.

When they go bang it's time to upgrade! , this sounds like something out of the ordinary - my guess is oil pump failed or some form of oil starvation if it is not a dropped valve.