Solid Lash Adjusters [Merged 9-8] lifters valve

[SOURCE1064]

I was checking out http://www.crco.com./ and I saw that they have 4G63 solid latch adjusters. Would they really be worth the $500?

 

[rdrkt]

Unless you are making well over 500 to the wheels on a consistent basis no. PS Even Shepherd isn’t running these. They have a theoretical benefit especially if you are tacking out to almost 9k. However for us mortals that live our life on pump gas it really wouldn’t make a difference.

 

[SOURCE1064]

Thanks for the info.

 

[candela]

plus constant adjustment sucks

 

[CarTunr22]

I was reading the August issue of SCC and as i was going over the internal modifications of the Norris Design evo 7 i noticed it had "solid lifters" does anyone know what the advantages of having solid lifters over HLA's? It jut seems like hydrolic lash ajusters are just there to cause us trouble.

 

[CarTunr22]

Is this just a crazy idea? it seams like it would be better because it i solid and not just a fluid filled rod that isn't allways consistent.

 

[Defiant]

It's common on pushrod engines, because the lifters will "pump up" and actually hold a valve off its seat. I don't know if this is a problem on DSMs with such direct leverage paths, but I guess someone thinks it's better.
Seems like adjusting them would be a dog. A girl one.

 

[Enigma_Man]

Well, have you ever heard of a problem with the HLAs other than them making ticking sounds? Personally, I haven't, but I'm curious if you have, otherwise, if it ain't broke...

-Jesse

 

[CarTunr22]

Enigma iguess ur right. can't you now buy new lifters that fix the tick sound?

 

[sophat34]

they came out with the revised lifters in 97, they didnt put them in any of the 97, 98, or 99s though from what I heard. a while back I saw a company ofering solid lifters for dsms, it does give you more lower end tq due to the valves being opened further at lower engine rpms. the solid lifters dont rely on oil presure to determin how far the valve opens. they do tick though and there is nothing you can do do get rid of it thats just the way that they are made

 

[Defiant]

Originally posted by sophat34
the solid lifters dont rely on oil presure to determin how far the valve opens.

Neither do hydraulics. Once they're filled, they lock when you try to depress them. They just take up the slack in the valvetrain, and unless they're worn out or get a gulp of foamy oil, are as solid as any compressed liquid.

 

[arknyd]

solid lash adjuster failures

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This past saturday morning I was driving the spyder, and I was getting on it some. After a couple of pulls i was getting on it again and all of a sudden i lost a cylinder. SHIT!!!! So I limp home upset, because I told myself I was not going to boost until after 1000 miles and after I retorqued the head. So when i get home I check compression: 1, 2 and 4 are spot on at 150 and 3....is at 30. Double shit. So I start disassembling things. I take the valve cover off and to my surprise 3 rocker arms are laying in the bottom of the galley. They all are from the intake side. Remember I have good compression in number 1 but one of the rocker arms has fallen out. #3 has both rocker arms are out on the intake side and... the tops of the solid lash adjusters have sheared off!!!! Paul and I rotate the crank and the motor is still in its proper timing, before we ever started the motor 150 miles ago, we even indexed the valvetrain so whenever we got around to tuning with the adjustable cam gears we would know what we were doing to it in regards to advancing or retarding. I also forgot to mention sparkplug 3 was wet, it smelled like gas but hard to say...and as you can imagine my oil isnt even black yet, so... After examining the SLA's Paul has concluded that they were poorly designed that were they sheared it was a hexagon shape which creates stress risers. We are assuming we didnt get any compression in cylinder 3 because the intake valves werent opening. So anyway that is where the spyder stands or should I say sits. My plan is to dump the sla's and go back to the HLA's. Any thoughts from the group about our findings or deductions?

Rob

 

[92redman]

Pics?

 

[NDgsx]

I've never seen a solid lash adjuster for the 4G63 that I like, I say go back to HLAs and port the oil pressure relief valve so that you don't get pressure creep at high rpms.

 

[blue1]

Can you do a leak down check to see if you have bent any valves? HLA's i have heard no prob's with! are you on stock cams?

 

[arknyd]

I have hks 272 intake and exhaust with ss 1mm oversize valves. I can try to get a pic of them. Has anyone else heard of any failures?

Rob

 

[Tevenor]

I've never seen a solid lash adjuster for the 4G63 that I like, I say go back to HLAs and port the oil pressure relief valve so that you don't get pressure creep at high rpms.

There is my suggestion as well.

 

[GRNDSM]

Rob,

What brand were these?

 

[oddrob]

We have had problems with all the 3 types of solid lifters we've used. Have had no problems with the standard lifters until recently when gearing has the Talon going through the traps well over 10k in 4th gear. Back to the drawing board. Sean has a new design in production. As soon as we get some test results I'll post again.

 

[arknyd]

Here are the pics of the failed solid lash adjusters. You can see in the sla Iam holding in my hand the discoloration of the metal due to what i assume is fatigue. Where the other 2 have sheared off is the same exact location of the discoloration. If you want to know the brand email me offline..

[email protected]

In one of the pics with rocker arm visible you can see divit in the roller.

rob

 

[Suparata]

I've never seen a solid lash adjuster for the 4G63 that I like, I say go back to HLAs and port the oil pressure relief valve so that you don't get pressure creep at high rpms.

I second that.
Plus make sure your valvetrain is doing it’s job since I think most of the HLA “pump-up’s” are directly related to excessive valve float that actually allow the lifters to pump up. There is only so much oil that can get in the lower chamber when the height of the lifter is set. The rest goes towards the rocker arm which is the first place it gets to anyway.

 

[GRNDSM]

Here are the pics of the failed solid lash adjusters. You can see in the sla Iam holding in my hand the discoloration of the metal due to what i assume is fatigue. Where the other 2 have sheared off is the same exact location of the discoloration. If you want to know the brand email me offline..

[email protected]

In one of the pics with rocker arm visible you can see divit in the roller.

rob

Rob,

It is me or your adjusters only failed on the on the intake side and they did so in pairs?

I wonder if you had some contact between valves and pistons? Have you pulled your head off since this has happened?

 

[arknyd]

I replaced all my sla's with the latest version of HLA's. When I did this compression was good in all cylinders and the motor runs fine. My next problem is my turbo is overboosting. I dont know if its my wastgate, boost controller or exhaust manifold design. The first thing iam going to do is hook direct line from intake manny to wg and see what happens. problem is i do not know which spring I have. WG is tial 40 mm. Turbo is T66, boost controller is older profec b. Exhast manny is from automotsports.

rob

 

[GRNDSM]

>I replaced all my sla's with the latest version of HLA's. When I did this compression was
>good in all cylinders and the motor runs fine.

Yea, but that does not mean that there was no contact!

>My next problem is my turbo is overboosting.

From what boost to what boost?

>I dont know if its my wastgate, boost controller or exhaust manifold design. The first
>thing iam going to do is hook direct line from intake manny to wg and see what happens.

>problem is i do not know which spring I have.

Well you will find out in a hurry .

>WG is tial 40 mm. Turbo is T66, boost controller is older profec b.

I have the same WG and I am not creeping. But then, I haven’t tried running under 25psi in a while.

Leon

 

[T71-TALON]

What do you guys think about a solid lifter that you can add shims to make custom heights or adjustments when needed. Yeah I know there are plenty of solid lifters out there but I don't think anyone has thought of this yet.