Scene of the crime

[70NPORT]

Exactly what happened here?

 

[68plymouth383]

Looks like a head gasket failed, and the engine got real hot and holed a piston.......

 

[polara71]

Your piston has a hole in it

 

[70NPORT]

Your piston has a hole in it

Thank goodness it ain't mine. I've seen bent connecting rods before yea, but first time for "ventilated" pistons. Must have made one hell of a noise.

 

[furyfinn]

Did the owner tell you what happened just before the BIG BANG? Was he revving the engine to it's limits on a street fight or something?

 

[bluefury361]

The pictures a little fuzzy but I don't see evidence of gasket failure. Any burnt valves....?
Looks like a lean mixture or incorrect timing. Or real cheap gas.

 

[polara71]

Thank goodness it ain't mine. I've seen bent connecting rods before yea, but first time for "ventilated" pistons. Must have made one hell of a noise.

Glad it isn't yours.....
...

 

[Ripinator]

Looks like a dropped valve, but when that happens there is usually a lot more damage to the cylinder wall and the piston. Well. . . he for sure wasn't using 2-cycle marine oil with TCW-3. . .

 

[70NPORT]

Glad it isn't yours.....
...

Thanks. I'd be inconsolable.

 

[polara71]

Yeah but it would be a reason to build a monster

 

[mr. fix it]

Looks like a dropped valve, but when that happens there is usually a lot more damage to the cylinder wall and the piston. Well. . . he for sure wasn't using 2-cycle marine oil with TCW-3. . .

I agree but where are the valves?
It sure looks like a nice round valve face but it could have just got stuck when firing up.

 

[70NPORT]

Yeah but it would be a reason to build a monster

Yes. After I got over a period of mourning, it would make for a nice excuse wouldn't it.

 

[commando1]

A hex nut fell into the intake.

Posted via Topify on Android

 

[62dodge]

detonation or pre-ignition would be my guess

 

[polara71]

Yes. After I got over a period of mourning, it would make for a nice excuse wouldn't it.

The perfect reason why.......

 

[70NPORT]

detonation or pre-ignition would be my guess

That would be some mighty nasty detonation, punching holes.through pistons and what not.

 

[70bigblockdodge]

I would say detonation weakend it then broke off under load.

 

[Big_John]

A hex nut fell into the intake.

Posted via Topify on Android

Yep.

 

[patrick66]

x3 on a foreign object in the combustion chamber. Screw? Nut? Small child?

 

[Stormer]

I'm with Dave on this one. The hole in the piston appears to be the problem but it could also be the thermostat.