Can't Stop Dropping Valves
Thread Starter
Registered User
Joined: Jan 2020
Posts: 1
Likes: 0
Can't Stop Dropping Valves So short version, have an LQ9 swapped into an 02 Silverado. Ran truck hard for 2 years, no problems. Planetary gear in the transmission eventually gave out. I'm thinking it just wound up to such a high RPM range it mushed a valve. Had transmission rebuilt and once valve gave way I had Bill & Jeff Ford out of Sylvania, Ga take a matching OEM head and put it on the flow bench to match.
Here I am about 5,000 miles later with another dropped valve. Waiting on a call back from Texas Speed about exact lift on the cam. Im thinking about 0.606. Which requires some milling for clearance on the valve spring seat. Could this be why I dropped another valve?? Not enough clearance would make sense, but I'm wondering if they did it to match why it didn't last near as long before it occurred for a second time.
Considering a set of Trickflow Specialty heads with a little machining to fit and compensate for the lift on the cam, but can anyone shed any kind of light on what else I could be running into? I'm open to all theories...
Just looking for help..
Here I am about 5,000 miles later with another dropped valve. Waiting on a call back from Texas Speed about exact lift on the cam. Im thinking about 0.606. Which requires some milling for clearance on the valve spring seat. Could this be why I dropped another valve?? Not enough clearance would make sense, but I'm wondering if they did it to match why it didn't last near as long before it occurred for a second time.
Considering a set of Trickflow Specialty heads with a little machining to fit and compensate for the lift on the cam, but can anyone shed any kind of light on what else I could be running into? I'm open to all theories...
Just looking for help..
