Easy(?) cam swap question
11-01-2015, 07:07 PM
#1
Easy(?) cam swap question I have a 2005 LS6 CTS-V with Trick Flow 220 heads, a Comp Cam (229/239 .627"/.621" 111.5+3), 1.7 rockers, BTR lifters, dual springs & slightly longer-than-stock pushrods. All that was put together by a pro. I'm going to install a different cam to go with a supercharger I'm also adding - new cam specs; 224/230 .612/.612 116 LSA.
I'm pretty clear on most aspects of the job ahead but have one question: when re-installing the rockers, according to the LS1HowTo article and others, I just have to re-torque the rockers back to 22ft/lbs and I'm good to go. Is that really it? No checking clearances or anything? The springs won't be coming off and I'll make sure to re-install the pushrods and rockers in the same place I took them off.
I'm pretty clear on most aspects of the job ahead but have one question: when re-installing the rockers, according to the LS1HowTo article and others, I just have to re-torque the rockers back to 22ft/lbs and I'm good to go. Is that really it? No checking clearances or anything? The springs won't be coming off and I'll make sure to re-install the pushrods and rockers in the same place I took them off.
11-01-2015, 08:41 PM
#2
With both removal and installation of the rocker arms make sure none of corresponding valve springs for each rocker are compressed (valve open). This way you avoid damaging the aluminum threads of the rocker bolt hole.
To do this from up-top you'll need a long handle ratchet so you turn the crank shaft by hand until the valve is closed when you re-install the corresponding rocker bolt.
To do this from up-top you'll need a long handle ratchet so you turn the crank shaft by hand until the valve is closed when you re-install the corresponding rocker bolt.
Last edited by 99Bluz28; 11-01-2015 at 08:57 PM.
11-03-2015, 11:14 PM
#3
With both removal and installation of the rocker arms make sure none of corresponding valve springs for each rocker are compressed (valve open). This way you avoid damaging the aluminum threads of the rocker bolt hole.
To do this from up-top you'll need a long handle ratchet so you turn the crank shaft by hand until the valve is closed when you re-install the corresponding rocker bolt.
To do this from up-top you'll need a long handle ratchet so you turn the crank shaft by hand until the valve is closed when you re-install the corresponding rocker bolt.
11-11-2015, 08:35 PM
#5
I have an adjustable pushrod and can see about testing the length. I guess there's no harm in me seeing what it tells me even though it's my first time. I figured, though, that since my heads and springs haven't come off or changed and the lift of the new cam is within 0.015 of the current cam, it probably wouldn't need different length pushrods (?)