Can not figure it out
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Cruising
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From: Killeen Texas
jefferyrivera
I was telling bill that i don't think you can over tighten pinching the rocker down. It goes down sits on a flat bottom and then you just torque it down and that is it. I am looking more into it cause I need to make sure on this so I don't do the same thing as someone might have before thank you.
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wow, that's an odd failure
... was it not making any noise with a broken pushrod?... any pics of the aftermath?
... was it not making any noise with a broken pushrod?... any pics of the aftermath?
Thread Starter
Cruising
Joined: Nov 2015
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From: Killeen Texas
jefferyrivera
Neutron82, there was little noise but not anything out of the ordinary i didn't really pay great attention when it first happen cause me and my wife were 6 hrs from the house. It did start popping on down shift after that happen that is why i knew something was wrong and then loss of power. I will post a pic of the push rod when I get a chance in a few min.
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
You are CORRECT.. The rocker sits on a rocker perch and the bolt is torqued down to spec.
The reason I asked about the rocker sitting square on the valve is that perch saddel can wear and cause the rocker to sit crooked on the valve.
Unless that was a defective pushrod, something caused it to break. You didnt mechanically over rev it did ya????
Bill
The reason I asked about the rocker sitting square on the valve is that perch saddel can wear and cause the rocker to sit crooked on the valve.
Unless that was a defective pushrod, something caused it to break. You didnt mechanically over rev it did ya????
Bill
Thread Starter
Cruising
Joined: Nov 2015
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From: Killeen Texas
You are CORRECT.. The rocker sits on a rocker perch and the bolt is torqued down to spec.
The reason I asked about the rocker sitting square on the valve is that perch saddel can wear and cause the rocker to sit crooked on the valve.
Unless that was a defective pushrod, something caused it to break. You didnt mechanically over rev it did ya????
Bill
The reason I asked about the rocker sitting square on the valve is that perch saddel can wear and cause the rocker to sit crooked on the valve.
Unless that was a defective pushrod, something caused it to break. You didnt mechanically over rev it did ya????
Bill
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Well,,,,, That means you should do a compression test on each cylinder and a leak down test.
When you over rev the engine, sometimes the valves KISS the pistons. If the push rods just bend, you could be OK If the valves are very slightly bent, you could be loosing compression.
If you over reved the engine due to a shift into SECOND when you intended to go into FORTH, You need a better shifter and the correct shift technique,, Fingers and palms!!
I saw this HINSON shifter video the other day and whoever is shifting,,, DOES IT CORRECTLY!
Here is the Forum post:
https://www.corvetteforum.com/forums...in-action.html
Here is the You Tube:
https://www.corvetteforum.com/forums...in-action.html
NOTE!!! The Aftermarket Shifter has a LOT to do with a good proper shift. Its a SPRING ASSISTED to center shifter.
The Proper HAND usage on the shifter is IMPORTANT ALSO. If you use the DEATH GRIP on the shift ****, you have the tendency to pronate and pull the stick toward your body. In the heat of the moment, you grab SECOND GEAR when you really wanted FOURTH GEAR. That mechanically runs the engine well in to the 8000+ RPM range and the valves float and touch the pistons.
I installed a Kirban shifter just to help prevent that possibility!
BC
When you over rev the engine, sometimes the valves KISS the pistons. If the push rods just bend, you could be OK If the valves are very slightly bent, you could be loosing compression.
If you over reved the engine due to a shift into SECOND when you intended to go into FORTH, You need a better shifter and the correct shift technique,, Fingers and palms!!
I saw this HINSON shifter video the other day and whoever is shifting,,, DOES IT CORRECTLY!
Here is the Forum post:
https://www.corvetteforum.com/forums...in-action.html
Here is the You Tube:
https://www.corvetteforum.com/forums...in-action.html
NOTE!!! The Aftermarket Shifter has a LOT to do with a good proper shift. Its a SPRING ASSISTED to center shifter.
The Proper HAND usage on the shifter is IMPORTANT ALSO. If you use the DEATH GRIP on the shift ****, you have the tendency to pronate and pull the stick toward your body. In the heat of the moment, you grab SECOND GEAR when you really wanted FOURTH GEAR. That mechanically runs the engine well in to the 8000+ RPM range and the valves float and touch the pistons.
I installed a Kirban shifter just to help prevent that possibility!
BC
Last edited by Bill Curlee; Nov 11, 2015 at 06:16 PM.
