[Z06] Broke a valve
09-30-2018, 03:15 PM
#4
Point the finger at...
A. Defective part
B. Defective builder
C. Defective driver
D. A combination of any of the above. Need more info. Did it let go at 9K rpm's? Here's a dime, call someone...........
A. Defective part
B. Defective builder
C. Defective driver
D. A combination of any of the above. Need more info. Did it let go at 9K rpm's? Here's a dime, call someone...........
10-01-2018, 12:45 PM
#6
Race Director
Thread Starter
After doing the same thing 20 or so times it finally worked. The chunks are what’s left of the piston.
Last edited by shane p; 10-01-2018 at 12:47 PM.
10-01-2018, 12:54 PM
#8
Race Director
Thread Starter
Different heads and cam, Mamo MSD intake, NW 102 throttle body, ATI pulley, bigger injectors, Johnson short travel lifters, Tick pushrods, Yella Terra rockers, Halltech cold air intake, American Racing headers, Quarter Master clutch, upgraded oil tank, improved racing oil cooler and thermostat. I’m sure I’m missing some other odds and ends. He was maybe half throttle going about 40 mph. Looks like a bad weld job on the 2 pc valve..... maybe.
10-01-2018, 01:05 PM
#9
Different heads and cam, Mamo MSD intake, NW 102 throttle body, ATI pulley, bigger injectors, Johnson short travel lifters, Tick pushrods, Yella Terra rockers, Halltech cold air intake, American Racing headers, Quarter Master clutch, upgraded oil tank, improved racing oil cooler and thermostat. I’m sure I’m missing some other odds and ends. He was maybe half throttle going about 40 mph. Looks like a bad weld job on the 2 pc valve..... maybe.
10-01-2018, 01:16 PM
#10
hope you guys remembered to install the lash caps on the intake. Or another mistake is installing them on the exhaust side stem. A motor will last roughly that mileage maybe more before it grenades itself
10-01-2018, 01:34 PM
#11
Melting Slicks
Member Since: Oct 2001
Location: Louisville KY
Posts: 2,559
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2020 Corvette of the Year Finalist (performance mods)
C6 of Year Winner (performance mods) 2019
I assume this was a back yard engine modification?
Last edited by pjazz; 10-01-2018 at 01:35 PM.
10-01-2018, 01:49 PM
#13
Team Owner
What year C6Z? How many miles on the heads before the rebuild? When the heads were reworked, were the OE exhaust valves re-used, or were they new OE replacements?
Zero regrets for installing F2042p 1-piece hollow stem ex valves in my AHP heads...
Zero regrets for installing F2042p 1-piece hollow stem ex valves in my AHP heads...
10-01-2018, 01:54 PM
#14
Race Director
Thread Starter
10-01-2018, 05:10 PM
#20
Anyone care to explain 2 piece valves and friction welding? Seems like a horrible idea but I’m sure I could be wrong???? Or maybe not by the looks of the motor, also were no lash caps because these 2 piece valves don’t use them? Or did they get left off accidentally?
