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Broken head. (56k warning)

   
Old 02-17-2007, 02:55 PM
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Default Broken head. (56k warning)
A little backround. Heads & cam have been in for around 4k miles. Along with heads & cam were PRC dual springs, chromemoly pushrods, new lifters & ported ls6 oil pump.

I had just pulled out of a gas station & was driving normal. Speed was about 45 mph. The car revved up 3-4k rpm, I let off the gas & put it in neutral. The rpms & mph kept steady even after letting off the gas. There was a squeaking sound for a few seconds along with loud tapping and a pop. After that the car died.

Now for the pics.




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Old 02-17-2007, 02:57 PM
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Crap...That hurts to look at. Any ideas of the cause yet?
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Old 02-17-2007, 03:01 PM
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ouch...wtf happened?
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Old 02-17-2007, 03:03 PM
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Whoa...what heads are those??
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Old 02-17-2007, 03:06 PM
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It will be interesting to see the under side of the head and to learn who's heads those are.
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Old 02-17-2007, 03:06 PM
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Are those the TSP LS6s? I heard that was happening to them.
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Old 02-17-2007, 03:07 PM
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I have no idea what caused this to happen.

They are PRC LS6 CNC'd heads from Texas-Speed.
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Old 02-17-2007, 03:09 PM
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Not throwing stones at anyone, but do a search. That is not the first time this has happened.
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Old 02-17-2007, 03:12 PM
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Originally Posted by Tony Orlando
Crap...That hurts to look at. Any ideas of the cause yet?
that sucks!
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Old 02-17-2007, 03:24 PM
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Originally Posted by frodo84
Not throwing stones at anyone, but do a search. That is not the first time this has happened.
Yeah I did that right after I posted to try to find out what caused it. I see i'm not the only one this has happened to.
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Old 02-17-2007, 03:25 PM
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Originally Posted by frodo84
Not throwing stones at anyone, but do a search. That is not the first time this has happened.
Not everyone has been on the forums forever
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Old 02-17-2007, 03:44 PM
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Originally Posted by nofearracing28
Not everyone has been on the forums forever
I was talking about not throwing stones at the supporting vendor that supplied the heads.
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Old 02-17-2007, 03:46 PM
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That sucks man.
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Old 02-17-2007, 03:51 PM
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Just call TSP on monday, it was a known issue. Im sure they would take care of it.
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Old 02-17-2007, 03:53 PM
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to much porting making them weak???
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Old 02-17-2007, 03:55 PM
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Originally Posted by DansRedz28
to much porting making them weak???
That would be my best guess.
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Old 02-17-2007, 03:55 PM
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Originally Posted by DansRedz28
to much porting making them weak???
Basically. Part of the reason they moved to a 230cc runner instead of 237cc. They explained the issue in the other thread.
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Old 02-17-2007, 04:52 PM
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No worries man call me on Monday morning & I'll replace them with a set of the all new smaller runner ls6 heads. I'm making sure & swapping out any of the old none welded casting guys to the all new ls6 head if they have any issues.

The new ls6 & new 5.3l heads have never had one failure so we'll just swap you over so you'll be good to go.
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Old 02-17-2007, 04:52 PM
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Do you know if this is the new version or the old version of the head?
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Old 02-17-2007, 04:55 PM
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That has to be the old version of the head, I redesigned with the smaller runner for better throttle response & to eliminate the possibility of this happening.
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