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#11 |
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Join Date: Oct 2003
Location: Sheboygan Wi
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Being a former Hemi Racer,(still have it) I have been taught that with alot of valve spring pressure you should make sure that you run a RADIAL single groove valve lock, as the square cut grooves tend to act like a guiolotine and clip the valve off, but leaving the valve locks in the retainer with the valve stem intact ! Excuse the spelling as i don't know how to spell Gilotine very well ! I learned about the Radial groove valve locks after # 8 Intake valve decieded drop through the top of the Piston ! Shazam,......That's what I was told !..........John
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John Lang 365 STK, SS |
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#12 |
Senior Member
Join Date: Mar 2002
Posts: 707
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Bummer about the Hemi Phil, hope it can be pieced together. Our hero Dave was at the oldies drags and i wondered where you were.
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#13 | |
Senior Member
Join Date: Oct 2006
Location: Parker, CO.
Posts: 728
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There are alot of days I wish I had never started on this BB Duster and just kept my 1969 340-S Barracuda FB (had that car for something like 12 yrs).
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Phil Saran Parker, Colorado |
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#14 | |
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Join Date: Oct 2008
Location: Lynden ,WA
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Thanks for the advice about the radial groove, I'll keep that in mind when ordering up the new parts. Anyone have a single Mopar aluminum head they want to sell?lol
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#15 |
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Join Date: Dec 2008
Location: Richmond Hill GA (and Port Ludlow WA)
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Sorry to hear about the failure Phil, and I'm still with you on what the source of the problem was that started you having to salvage a "professional" built engine. Keep tearing them up with the bracket car in the meantime. Thought visiting Don Little's pit space this coming weekend would be recommended but see he's not on entry list, geez, only 21 Super Stockers at Seattle.
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Jim Carter 2340 Super Stock 2340 SST/2340 Stock Set another place at the table Last edited by jmcarter; 07-31-2012 at 02:45 PM. |
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#16 |
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Join Date: Oct 2008
Location: Lynden ,WA
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Don is on the top of my list for help. I spoke with him on the phone last year and he got me moving in the right direction on fixing a few other issues. I'm still thinking about that 318 also, Just might take a little longer now.
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#17 |
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Join Date: Jun 2011
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Hey Phillip,
This catastrophic hemi story has given me a little deja vu! We installed a 517 that the customer supplied into a 70 Challenger that suffered the same fate. This one last about a year with limited driving. The autopsy revealed that the #3 int. valve had dropped and killed the head and piston and had scattered valve seat bits through out the other bores. The lash cap and keepers were still in place in the retainer and the tip was in the lash cap but there was another piece shaped like a "C" on the below the tang in the keepers. The bottom of the tip that was left in the lash cap was convex so it had run in a broken state for some cycles. The order of failure was the hardened tip had broken off of the valve and had run with .100" remaining to hold the valve in the retainer and this had peeled off the end of the valve to the point where it let go. If the valves in your heads were the Mopar Performance valves, take a measurement of the tip that was left in the lash cap and make sure the tip is the same as the tip length of an undamaged valve. This one here was the same length if you stacked the 'C' shaped piece on it, so it was only the hardened tip that initially broke. Hope you can salvage some of this! Terry |
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#18 |
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Join Date: Jan 2010
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For added information regarding lash caps. I have seen lash caps which land on the keepers, causing failure.
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#19 |
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Join Date: Oct 2008
Location: Lynden ,WA
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I just checked the lash caps, They have clearance. Thanks for the ideas.
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