crane, gold race series

[treeZ24]

their 1.6:1 roller rocker kit comes with their metric/sae conversion studs.

i thought i read somewhere (or understood/misunderstood) that they are adjustable rocker studs. if they are considering the things i have done with my 3.1/3400 hybrid build would it be possible to reuse pushrods, and get the right amount of preload? with the correct geometry?

i have read how to find the preload on cranes site and understand it but am not sure if they were adjustable. i didnt see anything on there about torque to yeild lol

a lil exerpt from the reading on the site.

"To adjust preload on hydraulic lifter camshafts with
adjustable rocker arms, turn the engine in the normal direction
of rotation until the exhaust lifter starts to move up, then
adjust the intake valve to zero lash with no preload, then 1/2
to 1 turn more. Turn the engine over again until the intake
opens completely and then is almost all the way back down.
Now, set the exhaust valve to zero lash, then 1/2 to 1 turn
more. Continue the above procedure for each cylinder until
all valves are adjusted to the same amount of preload. This
procedure will give you the correct lifter preload for any
hydraulic lifter cam with adjustable rocker arms."
-crane cams

-from a post by aaron
"You just have to install the old length ones first and check the geometry to make sure the roller tip on the rocker stay in the middle 1/3 section of the vavle stem."

he also mentioned ONLY using the gen 2 pushrods because they are heat treated (apperently) for using with the guideplates, which i also have to use.

is that the correct way to check the geometry? i have taken .02 off the heads , have a reground camshaft from a stock 3.1, obviously going to get the rockers

i think i have a handle on this, but thanks for anyone who can shed more light on this

regards,
brad

[geoffinbc]

Since you have ground the heads down and the cam down that combination is on your side and the geometry should be fine. You need to use early Gen III pushrods since they will be heat treated. Or buy heat treated pushrods of the same length.

They are fully adjustable rockers.

[AaronGTR]

Yeah, I thought Brad posted in that thread somewhere that the gen2 pushrods won't work with the gen3 heads because they are a different length? The early gen3 pushrods from before they switched to the self aligning rockers should work since they are heat treated. Thats the correct procedure for adjusting the lash too. No torquing involved. It's all by hand and feel. If you are using new or rebuilt lifters you'll want to get some oil in them before adjusting the lash.

[treeZ24]

i have read on cranes site that if you soak them in oil overnight before you install the lifters (i'm getting the crane cams antipumpup lifters for the 3.1) when you go to adjust the lash they might be too stiff.....

[geoffinbc]

Soaking them in oil is bullshit. It is not needed. Its a myth.

Dip them in oil before installing them so they are lubricated. But there is no need to soak them overnight or pump them with a pushrod.

[v6h.o.]

Yeah, I thought Brad posted in that thread somewhere that the gen2 pushrods won't work with the gen3 heads because they are a different length? .

You can use gen2 pushrods with gen3 heads, My engine has been running like this for 4 years now.

Aaron your getting GEN3 engines confused with what he is doing which is a Hybrid setup. Gen2 bottom end (flat tappet cam) with gen3 heads.

Brad use your stock pushrods. but check the geometery.they might be off.

You can use gen2 pushrods with adjustable rockers and gen3 heads. been there done that many times not only on my engine but on 2 others I've built for guys.

[v6h.o.]

ADJUSTMENT PROCEDURE:
With number one piston on the firing position at TDC install the rockers on the studs, the valves that can be adjusted are:
EXHAUST: 1, 2, 3
INTAKE: 1, 5, 6

Tighten in the adjusting nuts until all lash is removed. This can be determined by rotating the pushrod while turning in the adjusting nut. Once the play has been removed, turn in the adjusting nut one-half turn to center the lifter plunger. Now crank the engine over one complete revolution to number four firing position. These valves can now be adjusted:

EXHAUST: 4, 5, 6
INTAKE: 2, 3, 4

This is the quick easy way to adjust the v6 valves. from my procedure I wrote out years back for comp roller tips.

[treeZ24]

mucho gracious colin (dont know if thats even a word so dont say it :P)

hopefully this week i get all my stuff in and can assemble it!!

[AaronGTR]

Didn't know he was using flat tappet lifters. In that case you are correct, he can use the gen2's.

[geoffinbc]

Correction. He MUST use the Gen II push rods. I did not realize he was using a flat atppet cam either.

[treeZ24]

hybrid dudes..

3.1 stock bottom end in which case you MUST use flat tappet cams, and 3x00 top end

i know you all knew that but it was in the original post, musta missed it

thanks guys