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#1 |
![]() Join Date: Feb 2013
Location: New Concord Kentucky
Posts: 179
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Found on a recent teardown
Graham |
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#2 |
![]() Join Date: Nov 2016
Location: Southlake, TX
Posts: 584
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Yikes- that is scary!
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Bill Schroeder Texas Proud! 1991 Corvette ZR1 #1388 2015 Challenger Scat Pack Shaker ![]() |
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#3 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,677
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Graham,
Any sense on the cause of failure? Are these OEM?
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[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
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#4 |
![]() Join Date: Feb 2013
Location: New Concord Kentucky
Posts: 179
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Valve guides are stock. From the uneven tool marks on the end of the guides, they were over stressed whilst being knocked back to perform the port work then knocked back into position. After that it was just a matter of time.
Graham |
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#5 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,677
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Thx Graham. Any outward signs, ie oil burning, spark plug coloring, indicative of a problem here?
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[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
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#6 | |
![]() Join Date: Feb 2013
Location: New Concord Kentucky
Posts: 179
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Graham |
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#7 |
![]() Join Date: Apr 2007
Location: Northern VA
Posts: 2,648
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Graham,
Do you have any experience with the VG 19292/00 aluminum bronze valve guide SI International makes for the LT5 cylinder head? Sent from my iPhone using ZR-1 Net Registry
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Phil Wasinger 1994 Torch Red ZR-1 WAZOO Member George Braml Intake |
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#8 | |
![]() Join Date: Feb 2013
Location: New Concord Kentucky
Posts: 179
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Graham |
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#9 |
![]() Join Date: Jan 2004
Location: Alex VA
Posts: 1,087
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on the old LSV we saw 3 guides that had noticeable wear after 106k. The other thing was the idler shaft for cam chains.
That was a bit of a surprise. Thanks Phil for all your help on this!
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95 390 LPE ZR1 (505 rwhp) LSV = Lingenfelter Super Vette Twin Turbo 2003 Z06 (800 RWHP) |
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