Rockers
Thread Starter
Safety Car
Joined: Apr 2012
Posts: 4,077
Likes: 239
From: Houston TX
Rockers
I've been told these are both LS7 rockers. Who can tell me why one has the reinforcing along the bottom of the trunnion bore and the other does not? Chevy dealer couldn't help me!! WTF. I know you guys can answer this one easy.
Thanks
Thanks
Racer
Joined: Jan 2013
Posts: 257
Likes: 29
From: The Sunshine State
I pulled a broken stock rocker off of my 2008 Z that looked like the one you have without the extra metal "tabs". I ordered one new stock rocker to replace the broken one (just so I could move the car around, on to a trailer, etc. while I figured out what the heck to do ...), AND when the stock replacement came it looked like the one you have that does have the beefed-up metal tabs.
So, I just figured that GM made an upgrade to the piece by adding some additional metal. I was told it was still a LS7 rocker with 1:8 ratio. Seems to be working fine, but soon they are all coming out to get the CHE treatment !
Hope that helps !!
Safety Car
Joined: May 2011
Posts: 3,807
Likes: 508
From: Oshawa, Ontario
your top picture is the offset intake valve rocker arm . your bottom picture is the exhaust valve rocker arm. the intake is offset to center it on the larger intake valve. they are not interchangeable between intake and exhaust
Safety Car
Joined: May 2011
Posts: 3,807
Likes: 508
From: Oshawa, Ontario
Last edited by irok; Feb 23, 2013 at 04:18 PM.
Drifting
Joined: Feb 2012
Posts: 1,796
Likes: 37
From: skiatook oklahoma
would have helped to actually show the 2 rockers you have, instead of posting a pic from a vendors website as the second rocker.
http://toronto.canadianlisted.com/ca...17_774240.html
while i am here... is the first pic actually what you have or another pic from some other vendors web site?
dont bother to answer that question. i found it.. 2/3 way down this site...
http://www.autoserviceprofessional.c...roller-lifters
http://toronto.canadianlisted.com/ca...17_774240.html
while i am here... is the first pic actually what you have or another pic from some other vendors web site?
dont bother to answer that question. i found it.. 2/3 way down this site...
http://www.autoserviceprofessional.c...roller-lifters
Last edited by ChevyDave; Feb 23, 2013 at 08:29 PM.
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Drifting
Joined: Feb 2012
Posts: 1,796
Likes: 37
From: skiatook oklahoma
Dear OP...
well, i must confess it was a very difficult question to answer. After spending 2+ hours researching...
the answer is..........
you take a random picture off one site and a random picture off anoter site and you get a random difference,.
thats the difference. do i win a prize????????????????
well, i must confess it was a very difficult question to answer. After spending 2+ hours researching...
the answer is..........
you take a random picture off one site and a random picture off anoter site and you get a random difference,.
thats the difference. do i win a prize????????????????
Thread Starter
Safety Car
Joined: Apr 2012
Posts: 4,077
Likes: 239
From: Houston TX
Rockers
Dear OP...
well, i must confess it was a very difficult question to answer. After spending 2+ hours researching...
the answer is..........
you take a random picture off one site and a random picture off anoter site and you get a random difference,.
thats the difference. do i win a prize????????????????
well, i must confess it was a very difficult question to answer. After spending 2+ hours researching...
the answer is..........
you take a random picture off one site and a random picture off anoter site and you get a random difference,.
thats the difference. do i win a prize????????????????
The answer is no prize for you.
The question was... Why are these two rockers different?
The one on the left in the mans left hand has extra material on both sides of the trunnion bore. Rocker on the right side, the one with no hand on it, has no extra material around the trunnion bore.
Today we installed my Comp Cams trunnion kit. My good friend that helped me has a 1998 C5, he grabed one of the rockers that came on it stock and it is just like the rocker in the mans left hand on my post. My car is a much newer ZO6 and has rockers just like the the picture on the right side of my post with no hand. SO THE PRIZE GOES TO ALL WHO POSTED, DESIGN CHANGE!! Thanks to all of you that tried to help me with this one. Didn't think it would be this hard to figure out. The Comp Cams kit went in well, I see where there could be a lot of mistakes made if your not careful. I've put on about 70 miles already and motor is much quieter now.
Drifting
Joined: Feb 2012
Posts: 1,796
Likes: 37
From: skiatook oklahoma
in that case i do apologize. its just that when you show what appears to be an exhaust and an intake and from two different (random) web sites, its sorta hard to research,
i did search all GM documents and actually found no reference to a design change. But, i will not only take your word for it.,
I apologize.. and thanks for the information.
i did search all GM documents and actually found no reference to a design change. But, i will not only take your word for it.,
I apologize.. and thanks for the information.
Thread Starter
Safety Car
Joined: Apr 2012
Posts: 4,077
Likes: 239
From: Houston TX
in that case i do apologize. its just that when you show what appears to be an exhaust and an intake and from two different (random) web sites, its sorta hard to research,
i did search all GM documents and actually found no reference to a design change. But, i will not only take your word for it.,
I apologize.. and thanks for the information.
i did search all GM documents and actually found no reference to a design change. But, i will not only take your word for it.,
I apologize.. and thanks for the information.
No reason for you to be sorry.
