boostedpower

what the hell is preload and how do i find it?

boostedpower

yeah i know im retarded the motor will never run all that, but for ***** and giggles

AChotrod

iTrader: (17)

I like comp cams directions. Never failed me yet!!! Adjustments start on #7.
http://www.compcams.com/v002/Instructions/Files/151.pdf

Z28Camaro30Ann

iTrader: (15)

Preload is the pressure on your lifter. it is a hydraulic lifter so there is a cushion inside it. Preload is where there is enough pressure to not have the lifter's cushion all the way to the top of the lifter, but it is not bottomed out. If there is not enough preload you could have valve float...if there is too much preload, you will bottom out the lifter and tear it up. You have to find that happy medium

Badazz 97 TA

iTrader: (18)

and to add, there gonna bleed down and feel a little loose after there set. Dont worry about. They will be fine once oil pressure builds up when you fire it up.

boostedpower

okay starting over again, I turn the crank until the INTAKE begins to CLOSE, i take the Exhaust rocker and and tighten the lock until while shaking the back of the rocker on the push rod until rocker is seated on the pushrod and no longer makes that "clicking noise" i then turn it 1/2 a turn and set it with the allen key, i can spin the push rod although it takes a little bit of effort, getting close?

RamAir95TA

iTrader: (2)

Preload is the 1/4, 1/2, or 3/4 turn that you apply to the lifter once you've reached zero lash.

RamAir95TA

iTrader: (2)

OMFG. Who give a **** when the valve starts to close. Seriously.

Just make sure the lifter is on the base circle and adjust with the spin-drag method. The lifter will be bottomed out in the bore. Intake, exhaust, doesn't freakin' matter.

MAKE IT EASY ON YOURSELF.

boostedpower

Followed the Comp Cams Guide, Here is my step by step.... Step one: rotate engine until the Exhaust pushrod begins to raise/open, Stop rotation.
Pic->
then apply a some assembly lube to top of INTAKE push rod and place rocker back on... Pic->

Hand tighten the poly lock while rotating the pushrod until you feel the slightest bit of slack (we are now at zero lash)


Then turn the poly lock 1/2 a turn... pics->


Then set lock with allen key... Pic->

boostedpower

I can still spin pushrod but there is some Resistance after the lock has been set...

SS RRR

iTrader: (2)

You have an unorthodox way of doing things. Do you not have a 5/8" box end wrench you can use?

boostedpower

I didn't know it made a difference in this job? i do i will include it in future pictures, but have i done this correctly?

bigj2717

iTrader: (15)

Yeah it's a lot better when you have the right tools so you don't start messing up parts because you're lazy. But it sounds like you're doing it right now i would just keep my fingers crossed that you actually did everything else right

old93camaro

iTrader: (8)

im sorry every time i look at your working area i get sick i cant even concentrate on the matter at hand... i was always taught proper, planning prevents **** poor performance..

SS RRR

iTrader: (2)

I dunno if you have or not. I've only been looking at the pretty pictures after others posted up how they feel you need to do things.
It's just that, for me, adjusting valves is one of those things where I like to feel what is going on. Can't do that so much with a clunky crescent wrench. Besides that using something like that can easily scuff up the tops of the rockers if you aren't careful. It's just one more thing to watch out for.

boostedpower

and it did just that lol whoops (scuff up the top) so through the confusion when doing exhaust side, can i do the same, rotate motor until intake side begins to lift/raise, then set lash on the exhaust side, or must i open the intake side fully and then once it starts to close set the lash for the exhaust side....

boostedpower

totally kidding i did all the rocker arms but i found a bad lifter... it doesn't have that cushion that the other lifters have so i need to replace it

bigj2717

iTrader: (15)

If you have one bad lifter I would just replace them all

RamAir95TA

iTrader: (2)

Fine. Don't listen to me. I'm done trying to help you.

KABOOM.

boostedpower

I am listening to you ramair you've been helping me the whole time?!?! i did the comp cams guide and on the second to last rocker i found a lifter that was rock solid!