[doerf]

I keep reading this thread thinking it must be April 1st
would be nice to see someone explain what they actually mean by "pumped up", or explain how a hydraulic lifter actually works


I would think fully pumped up lifter isn't any taller than one just sitting on the bench, its that if pushed against a push rod without oil it would push down and get shorter, if you adjust things with it pushed down then when pumped up it will bend shit

 

[1968 hot rod]

.842 lifter will fit into a 13/16 12point deep socket.
You can use a drill press and 1/4” dia dowel in the chuck to compress the lifter.
You should not need to push too hard.

 

[Badd64]

I'll try and rig something up to try this, its a roller lifter so I have to figure out how to hold that, may be a socket the right size.



Because that is what the instructions want when setting the per load. they have specific warnings about not "soaking" the lifter before installing. I guess the answer is I would like to follow these instructions to the letter..

If these are Isky roller lifters. The reason they have "no soaking the lifter" is so you don't wash out all the special lube for the roller bearings.

 

[SS70ElCaminoOwner]

I like to finish my posts, so...

I was able to bleed down all but three lifters. I took those apart and the plungers on the inside were comply frozen in place, I cannot get them out.
I fear for the life of the other lifters so I am replacing them all.

 

[1968 hot rod]

Soak in lacquer thinner.

 

[SS70ElCaminoOwner]

Soak in lacquer thinner.

I would never really trust them at this point. Good thing I tried to bleed them down.

 

[Muldokken]

well, sounds like you really dont know what you are doing. that my be the reason you spun a bearing. all my years in the field I have always adjusted them running. never had a problem.

 

[SS70ElCaminoOwner]

well, sounds like you really dont know what you are doing. that my be the reason you spun a bearing. all my years in the field I have always adjusted them running. never had a problem.

Why do you resort to insults when someone actually follows the manual?

 

[David Bates]

Why do you resort to insults when someone actually follows the manual?

Exactly what manual are you referring to?

 

[SS70ElCaminoOwner]

 

[Badd64]

I don't see anywhere in the instructions for the lifters they need to be bled down.

https://edelbrock-instructions-v1.s3.amazonaws.com/cpg/Comp%20Cams/comp4-194.pdf

In fact, they do say to soak the lifters in oil for two hours before install... Part 3 of instructions

 

[SS70ElCaminoOwner]

This is my last response to a post that does not deal with the thread's question.

Not sure what instructions you are reading, mine in bold italic says "DO NOT soak lifters in oil, or pump up", I have attached a picture as my word does not seem to be enough.

 

[Badd64]

Just turn them upside down or bleed hole down and let them drain.

Page 3. your lifters must be old, theyhave revised instruction... click the link to the instructions from comp cams I posted. It is for the evolution lifters same part number you have

3. Next, soak the lifters with COMP Cams® Break-In Oil (Part #1590) or equivalent for at least two hours. Doing so ensures the lifters are adequately lubricated on their outer surfaces prior to installation

 

[markt318]

Im Not an engine but you're going to have valves not fully closing, bent push rods? Back firing

if lifter are pumped ,then they cannot hurt anything! They just need to be zeroed out and 1/4 turned run and listen may need another 1/4 turn but no more than !

 

[markt318]

So you're saying you adjust it with no oil, so that it won't fully collapse a valve spring and bend a pushrod.

An empty hydraulic lifter has a given height between the surface of the lifter and the pocket for the pushrod. So you're saying you set the preload when the lifter is empty.

A hydraulic lifter gets even taller when it fills with oil. Thereby pushing the pushrod further upwards at all times. This would push the rocker arm farther up on the pushrod side at all times, thereby pushing the rocker arm further down at all times and leaving the valve (and by extension the valve spring) further compressed at all times. This would result in the valve and valve spring undergoing more compression than it would have if adjusted when the lifter was full.

I fail to understand how adjusting a hydraulic setup empty is desirable under any circumstance. The lifter fills up when the engine is running. Adjust the valvetrain when the lifter is in its running condition: full. Adjusting it empty is the exact way to potentially cause what you're trying to avoid: coil bind and bent pushrods.

weather a liter is dry or pumped the retainer is in a fix position ,zero out and 1/4 turn is safe then run and it will most likely need 1/4 turn more NP !

 

[markt318]

I accept the fact that most people do not bleed down their lifters and that is fine.

I would prefer to bleed them down before installing them and the question still remains, what is the correct method for bleeding down a lifter?

I talked with Comp Cam today and they say to soak them in mineral spirits and then let the mineral sprites evaporate out. I an trying that now.

What kind of BS is this ! The lifter cannot grow pass the pumped up state and zeroing the play is the max it can go ,with a 1/4 turn at the lowest cam point you are safe may need 1/4 turn more in most case i have seen 1/2 turn is standard !

 

[markt318]

Why would a push rod bend? It would only open the valve.

Am I dumb or something thinking that video above is whacked?
Why does he crank away on the the rocker nut after zero lash?

This is total BS !!! LOL

 

[shovelrick]

All I can say is all my engines run great, 1 being a solid roller stroker thats been together going on 25 yrs, a hyd roller stroker 5 yrs

 

[David Bates]

Just turn them upside down or bleed hole down and let them drain.

Page 3. your lifters must be old, they have revised instruction... click the link to the instructions from comp cams I posted. It is for the evolution lifters same part number you have

3. Next, soak the lifters with COMP Cams® Break-In Oil (Part #1590) or equivalent for at least two hours. Doing so ensures the lifters are adequately lubricated on their outer surfaces prior to installation

The Comp Instructions you linked are the same part number and revision date as the ones he posted in his reply #30 fwiw. The page 3 that the OP posted in reply #32 is from a different document but he goes on to say he's out of here. Oh well, he's going to do what he wants so good luck to him.

 

[71408SS]

He's using the Edelbrock topend kit according to his first post, not sure why the Comp instruction set is shown up in post #30. The photo about "DO NOT soak lifters" is from here:

https://static.summitracing.com/global/images/instructions/edl-22632264-performerrpmhydraulicrollercamsf.pdf