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Re: Why would an intake valve break?
[Re: Dragula]
#1250632
06/15/12 09:33 PM
06/15/12 09:33 PM
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Joined: Jan 2004
Posts: 2,103
East Coast, NJ
fig426
OP
top fuel
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OP
top fuel
Joined: Jan 2004
Posts: 2,103
East Coast, NJ
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Quote:
Quote:
Ouch
Been there, done that last year with our 477 Hemi. The cause on mine was over reving it in the water burn out, and that bent the valve. I zinged it, and didn't catch it in time. Then I staged and ran it down the track where the valve head broke right off and migrated thru a couple of cylinders.
I have also seen the seats drop out of the stock hemi heads for no reason, and the valve guides on a stock hemi are almost always over sized, not tight.
I should be good with that valve seat now,, It seems to peened well into place.   .. what else can I do but make jokes at this point.  I'll pull it out of the car Monday night and see what else is trashed. 
Chris from New Jersey
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Re: Why would an intake valve break?
[Re: fig426]
#1250633
06/15/12 09:46 PM
06/15/12 09:46 PM
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Joined: May 2004
Posts: 12,396
Taxes & Virus's R-US, NY
Dragula
I Live Here
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I Live Here
Joined: May 2004
Posts: 12,396
Taxes & Virus's R-US, NY
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Quote:
Quote:
Quote:
Ouch
Been there, done that last year with our 477 Hemi. The cause on mine was over reving it in the water burn out, and that bent the valve. I zinged it, and didn't catch it in time. Then I staged and ran it down the track where the valve head broke right off and migrated thru a couple of cylinders.
I have also seen the seats drop out of the stock hemi heads for no reason, and the valve guides on a stock hemi are almost always over sized, not tight.
I should be good with that valve seat now,, It seems to peened well into place. .. what else can I do but make jokes at this point. I'll pull it out of the car Monday night and see what else is trashed.
Yeah you get over it after a while. I felt sick about it for a couple of days...Ours had to be re-bored, and the one head had to be welded up and everything re-cut. Sucked, but since then, we have run 11.13 at +122mph in that 3900lb car with that now 484 cube street hemi....
Don't quit, fix and rebuild at your pace...Happens to almost everyone at least once...Few other times in my case.
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Re: Why would an intake valve break?
[Re: Dragula]
#1250634
06/15/12 09:53 PM
06/15/12 09:53 PM
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Joined: Jan 2004
Posts: 2,103
East Coast, NJ
fig426
OP
top fuel
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OP
top fuel
Joined: Jan 2004
Posts: 2,103
East Coast, NJ
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Yeah once I get it apart and see what it needs, I'll start getting it back together. I'm not worried about it. There are alot worse things that can happen in life so I'm still thankful in the big scheme of things.
Chris from New Jersey
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Re: Why would an intake valve break?
[Re: fig426]
#1250635
06/16/12 12:22 AM
06/16/12 12:22 AM
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Joined: Mar 2009
Posts: 1,169
Virginia Beach, VA
Old School
super stock
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super stock
Joined: Mar 2009
Posts: 1,169
Virginia Beach, VA
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when mine did that same thing, it was from floating the valves. i put stiffer springs in and no problems since.
68 cuda formula S 588" bb 5sp
70 CUDA CONVERT 500" 5SP (SUBLIME)
70 CUDA CONVERT 500" 5SP (PLUMCRAZY):TOO MUCH HORSEPOWER, IS ALMOST ENOUGH!
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