Generation III Internal Engine - question on Yella Terra Ultra Lights
03-31-2007, 05:21 PM
I'm going to be installing these beauties tomorrow after I change a few things on the engine that's going on today. the question I had was there are 2 little drill starts in each shaft between the rocker arms. I read thru the Yella Terra instructions and I read the instructions on ls1howto but no info on this...what are those to marks for? Is that a mark showing which way it needs to be installed (facing up or down)?
Hope someone has the answer before tomorrow morning, thanks guys.
04-01-2007, 11:49 AM
no one? I don't even know if it means anything, I just want to make sure before I install...I've got a few more hours before I install so I'll check back before then.
04-01-2007, 11:54 AM
I think Patrick G has those, PM him.
04-01-2007, 02:36 PM
Smitty's '04 GTO
04-01-2007, 06:58 PM
I checked mine after reading your post, and have the same thing. I can't see that they'd serve any functional purpose as it pertains to installation or operation. My guess would be that they were machined like that perhaps to allow a tool to hold the shaft while assembling the pairs of rockers during manufacture?
They can only be installed with those divets up or down so it's a 50/50 proposition. My plan is to pick one (probably up) and do all 8 pairs the same...
Good Luck with it!!!
04-04-2007, 04:35 AM
The markings you are seeing are internal manufacturing identification marks and serve no functional purpose. Some engine builders use the id marking upon installation as a reference and rotate the shafts occasionally to even wear under extreme conditions.
Hope it clears the confusion....we'll be posting something up on the webpage becuase it is a common question....
04-04-2007, 03:21 PM
all makes sense now.
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