What the f**k?

[Teflon]

Any ideas on how this happened? There were no metal pieces anywhere to be found, the pistons were fine and untouched, the valves were fine and untouched and the spark plugs were all intact. I'm lost.

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[white92talontsi]

You must have had a low spot there and it finally burned through over time.

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[97-gst]

holy moly man...WTF?

 

[Eeeeky]

wow...running lean in those two cylinders much? That freaking sucks!

 

[DSMnoobsause]

wow you went lean and then kept racing it for about 5 hrs ..

 

[Teflon]

Stupid lieng wideband

 

[Misterbeechy]

yea bro, looks like some lean-idge

 

[talonalex92]

Got heat? And you wouldnt see any peices, it got hot enough to break, it probably went to small enough bits to blow out the exhaust. Did you look at the turbine wheel?

 

[BogusSVO]

yes you became lean and slowly torched the gasket and head.

the head is savable tho, some welding, a bit of blending and a good surface job and you will be fine.

 

[Teflon]

Oh yeah I forgot to mention the hot side is fine as well...no nicks or scrapes at all. And would it be worth saving or should I just get a new head?

 

[2gdsm_nc]

Rebuild a completely different head or find someone to weld it and grind/smooth it back down then just resurface the head. Up to you on that one but I would just get it welded. it more than likely (depending on the weld job) be stronger afterward anyhow. Looks similar to a dry shot nitrous blow out.

 

[SlowChild3]

Not sure what its called but would a head ring/gasket prevent this?

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[guitarhero14]

Not sure what its called but would a head ring/gasket prevent this?

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O-ring? No it wouldn't help in the least bit. You need to figure out your lean issue.

 

[SlowChild3]

O-ring? No it wouldn't help in the least bit. You need to figure out your lean issue.

I'm not the OP. Was just curious.

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[BrokenTsi]

I would ship out the injectors to get tested/cleaned while you're repairing the head.

 

[guitarhero14]

I'm not the OP. Was just curious.

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oh my bad.

 

[Tanro]

Holy crap. That is some serious shit there. I am not into the drag scene much but that had to be some serious power going right there.

 

[2g 6 bolt swap]

Thats some serious lean carnage man. Were you logging at the time of this event? If so post it up.

 

[huafist]

My initial thought would be that detonation killed the fire ring in that area, and that allowed the flame front to creep in between the head & block at that location. You were lean (thus the detonation), and the high cylinder temps began melting the aluminum in that location. I would guess it was pretty well vaporized when it went though the turbine wheel, so no damage there isn't a surprise. Are there any pock marks on the piston or quench pad that would indicate you were experiencing high levels of detonation?

I'd check the block surface between those two cylinders as well. Typically when it's this bad, the block has a gouge in it as well. But yeah, the head is repairable.

 

[guitarhero14]

Holy crap. That is some serious shit there. I am not into the drag scene much but that had to be some serious power going right there.

Its not a result from high horsepower.

 

[Tanro]

Bad tune then? I don't see how anyone could have that much detonation on purpose...

 

[white92talontsi]

Bet u got some broken rng lands also!

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[ExpresS]

Bumpppppp. I might be picking up the block that head sat on. Anything i should check out?

 

[evil tsi]

my dad did this with his chevelles motor. the headgasket blew from the nitrous and crossfired between cylinders and it looked just like that but through the block and head surface....

good luck on the expensive fix

 

[crimsondragon]

Bumpppppp. I might be picking up the block that head sat on. Anything i should check out?

Aside from the usual suspects? No. Check the pistons and the rings.