Today’s Carnage…!!! It’s Broken Pretty Good

[oneg360]

Pulling away from a light about 4k Rpm herd a noise pulled valve cover and found this.

 

[BEATAV8]

ouch!

 

[GNVYUS 1]

Sorry to see that damn.

Curious what the others will comment on GN1 Rockers vs TA (T&D), metal quality etc?

 

[pacecarta]

it wasnt the rockers it was the champion aluminum pedestil that gave up , fixed a few over the years
if you ask me whats the cause its sand mixed with the alum during the pour making them weak

tap whats left in head for helicoil , chamfer the edges of the broken part and drill out any threads , thoroughly clean both parts, bolt it back down with a straight rocker shaft and longer bolt that reaches deep into the helicoil .. then weld it

alternative is what i did years ago for my GN1 8bolt heads is have champion mill them for 14bolt , this will allow you to step up to scorpion individual shaft rockers or better i went with the jesel rocker setup$$$

 

[BEATAV8]

I have a set of the same style heads, still new never run. I’ll be installing rocker shaft studs that go as deep as possible….

 

[oneg360]

it wasnt the rockers it was the champion aluminum pedestil that gave up , fixed a few over the years
if you ask me whats the cause its sand mixed with the alum during the pour making them weak

tap whats left in head for helicoil , chamfer the edges of the broken part and drill out any threads , thoroughly clean both parts, bolt it back down with a straight rocker shaft and longer bolt that reaches deep into the helicoil .. then weld it

alternative is a little more expensive and thats to pull heads and have champion mill them for 14bolt , this will allow you to step up to scorpion individual shaft rockers or better the jesel rocker setup$$$

it wasnt the rockers it was the champion aluminum pedestil that gave up , fixed a few over the years
if you ask me whats the cause its sand mixed with the alum during the pour making them weak

tap whats left in head for helicoil , chamfer the edges of the broken part and drill out any threads , thoroughly clean both parts, bolt it back down with a straight rocker shaft and longer bolt that reaches deep into the helicoil .. then weld it

alternative is what i did years ago for my GN1 8bolt heads is have champion mill them for 14bolt , this will allow you to step up to scorpion individual shaft rockers or better i went with the jesel rocker setup$$$

Thanks. I will explore all options. How much do you think it will run to send them in a get them upgraded?

 

[BEATAV8]

Thanks. I will explore all options. How much do you think it will run to send them in a get them upgraded?

After it has broken like that I think I would prefer converting the head to the 14 bolt style where all that material would be machined away. Not sure what champion would charge but it can’t be too awful as they do that type of work all the time.

The t&d rockers will cost about $1700 though. Or the cheaper option is scorpion stud mount rockers.

 

[pacecarta]

and you should be able to source the new shaft and anything else needed to repair the rocker shafts from T+D

 

[oneg360]

After it has broken like that I think I would prefer converting the head to the 14 bolt style where all that material would be machined away. Not sure what champion would charge but it can’t be too awful as they do that type of work all the time.

The t&d rockers will cost about $1700 though. Or the cheaper option is scorpion stud mount rockers.

Thanks I will pull the heads next week and contact champion. I will update this post and let you guys know.