Adjustable Rockers w hydraulic lifters

[BeeKool]

Here in a few hours I'm going to go install my Rocker assy onto my 440.
Will be a first for me, any advice do's, dont's, tips, links would be helpful.

Mild hydraulic cam, Crane gold adjustable rockers, 452 heads.
Pushrods are from Comp and same length as stock
Thanks

 

[69Bee]

Exhaust opens, adjust intake-zero lash +3/4 turn
Intake closes, adjust exhaust-zero lash +3/4 turn
Easy Peasy...

 

[BeeKool]

Exhaust opens, adjust intake-zero lash +3/4 turn
Intake closes, adjust exhaust-zero lash +3/4 turn
Easy Peasy...

No Loctite?

 

[sputnik 440]

Did same thing. Are you changing springs? The only thing that I ran across was the need to go back in and use some of the shims between some of the rockers on the shaft. I could here some "pinging" that alerted me to something was loose. Added shims and action smoothed out. I think I should have caught the "play" before I put the valve covers on in the first place. Good luck. Don't forget to use the Comp Lube, or equivalent before you close it up.

 

[68 HEMI GTS]

Make sure you have some end play on each pair once they are torqued. Also verify that the rockers are aligned with the valve tips.

 

[BeeKool]

I

Did same thing. Are you changing springs? The only thing that I ran across was the need to go back in and use some of the shims between some of the rockers on the shaft. I could here some "pinging" that alerted me to something was loose. Added shims and action smoothed out. I think I should have caught the "play" before I put the valve covers on in the first place. Good luck. Don't forget to use the Comp Lube, or equivalent before you close it up.

Heads are fresh and assembled minus Rocker shafts.
I should have enough shims.
Have some Clevite Bearing Lube that I've been using.

 

[69 GTX]

Make sure you have the shafts oriented the right way for oil feed. I would think you would pre load them same as what OEM calls for but that is just a assumption on my part. You may have to start it up to operating temp to set them also.

 

[BeeKool]

Make sure you have some end play on each pair once they are torqued. Also verify that the rockers are aligned with the valve tips.

I saw a guy on YouTube use dry erase marker on the valvetips. Looked like a good idea.

 

[Jcharger]

I read somewhere that there are a number of threads showing on the rockers that is ideal. This might mean selecting pushrods of a different length to get this and the preload correct.

 

[oldbee]

No loctite.

 

[sputnik 440]

Before you set the lash, be sure to give the lifter time to expand before you finish setting it. I think that the load you put on the lifter is something that you will have to play with. I did. If you read some or all of the threads on here, you will see everything from 1/4 to 1/2 to 3/4 and some say they go a whole turn. For me, it was settling for 1/2 turn.

 

[wyrmrider]

If you pre primed the lifters turn the motor over 1/4 turn at a time two revolutions waiting a couple of minuets between turns= this is with the pushrods in and a rough adjustment
fully pumped up lifters and tight adjustment can bend valves
now I do not pre load- just let them rattle till they self adjust/ pump up to the right place
now let's say the factory rockers have close to correct geometry
and the roller is about a 1/4 inch radius
so you raise the center of the roller about a 1/4 inch, and lower the pushrod/ adjuster about .16
how do you use a stock length pushrod (with a cup end)
and if you bend the (design of) adjust side up raising the cup .16
how do you use a stock length pushrod
and
how do you keep the adjuster in line with the pushrod
eyeball the rocker movement on both ends and see if it makes mechanical motion sense- no funny angles adjuster to pushrod angle should be about as much one way as the other when closed to open- straight line at mid lift and
about the same up angle valve closed and down angle valve open ( line through fulcrum and roller tanget to the valve stem at mid lift)
some roller rockers are designed all wrong for BBM (or anything with shaft rockers) BVVC
now measure for your pushrods

 

[khryslerkid]

Read this article and definitely check out the pictures.
http://www.hotrod.com/articles/ctrp-0611-rocker-arm-valvetrain-geometry/

 

[Mike67]

Does any body use the twist in the finger/thumb method any more?
Make sure you lube the pushrod ends..here is what Comp says about their lifters...

Section I. Setting preload with ADJUSTABLE ROCKER ARMS
Turn the engine in the normal direction of rotation. Start with cylinder number one (1). When the
exhaust valve begins to move, adjust the intake valve to the correct preload. To reach zero, take the
pushrod between your finger tips and move it up and down while you tighten the rocker arm. Once
you feel the pushrod has no more vertical slack, you are at zero preload. Make sure the pushrod is
in the lifter and the rocker arm seat when making valve adjustments. As stated before the best
setting is .030” to .040”, or ½ to ¾ a turn of the wrench past zero. Now, you can move on to the
exhaust valve on the same cylinder. Begin by rotating the engine over again until the intake valve
reaches maximum lift and is almost all the way back down. Then set the exhaust valve using the
same method as the intake (.030” to .040”, or ½ to ¾ a turn of the wrench past zero). Continue
adjusting the valves on each cylinder in this manner until all valves are adjusted.

 

[69L48Z27]

^^^^ I do. My hydraulic lifter education was on SBC's. Spin to zero clearance and then go another half turn. You can do this with or with out pumped up lifters.

 

[sputnik 440]

I use Comp Cam method. Simple, straight forward, I just rechecked them after 2 or 3 warm up runs. Several needed readjusting, but no problems after that. This was on a 440 with 915 heads, ported and .040 over.

 

[747mopar]

Like mentioned make sure shaft orientation is correct, rockers are orientated correctly, side clearances on rockers are within spec, check contact pattern on valve stems and take your time. I always adjust to zero lash by spinning the pushrod back and forth while adjusting the rocker, you'll feel slight friction once lash is removed then preload the lifter. The preload is where you'll get different feedback, some only preload 1/4 turn, others half and so on.

I've never used loctite on any of the assembly.

 

[lewtot184]

Here in a few hours I'm going to go install my Rocker assy onto my 440.
Will be a first for me, any advice do's, dont's, tips, links would be helpful.

Mild hydraulic cam, Crane gold adjustable rockers, 452 heads.
Pushrods are from Comp and same length as stock
Thanks

stock push rods are 9.31 ball to ball. hydraulic with adjustable rockers should 9.125 from the 5/16" ball at the bottom to the inside of the 5/16" cup at the top. be careful! those rockers will check to 1.6 even thought they are advertised 1.5. this will increase lift at the valve at least .030". be careful of coil bind and retainer to guide clearance.

 

[BeeKool]

stock push rods are 9.31 ball to ball. hydraulic with adjustable rockers should 9.125 from the 5/16" ball at the bottom to the inside of the 5/16" cup at the top. be careful! those rockers will check to 1.6 even thought they are advertised 1.5. this will increase lift at the valve at least .030". be careful of coil bind and retainer to guide clearance.

That's why I said F-it and put the stock assy back on. Just the way Ma Mopar intended
I have some shorter rods coming, but I think I'm just going to sell evetything.

 

[oldbee]

BeeKool- whoa, take a step back. Way back when, I had a mech.cam w/ adj rockers and used stock pushrods on a BB and had no prob whatsoever.