I am in the process of replacing my LMA's in my 94 h22 head with the spring type ones out of 98+ h22s.. and There is a visible height difference between the lifters, but the spring type feel stiffer. Do I still need to shim them? I bought some 5/16 washers that bring it up to a much closer height... I just wanna make sure before I put everything back together again

 

i dont see why you would need to shim them. The A1 and A4 heads are the same in that department, not really much different at all as a whole.

What kinda height difference are we talking here? The spring has a shorter installed height?

 

Yes, they are a mm shorter, but Mykizism answer my question
Thanks anyways

 

you should be able to use the washers. lots of B-series guys use the prelude LMA's with a washer to shim it up to the right clearence.

i do belive it has to be around .040 thou or .045 thou thick.

 

Well Mykizism said not to shim them, so I didnt.
I installed it and it runs fine, except the newer lma's seem noisier..
I noticed a thread with 2point6 saying the heads ARE different between the newer and old h22's.. which would mean I would have to shim them...
Maybe I'm being too critical, but are the spring type supposed to be alot noisier than the older ones?

 

can you link me to scotts thread where he talks about it?

 

https://honda-tech.com/zerothread/1836208

 

i meant the thread where 2point6 was talking about the heads.

 

Damit, I can't find it.........!

Well either way, I think these things make way too much noise.... I KNOW new preludes didnt make this much noise when they were new.. my rockers look fine.. Im just thinking I did have to shim them 0.040'' They were about 0.040'' shorter than the older ones too btw.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Sam_J &raquo;</TD></TR><TR><TD CLASS="quote">Damit, I can't find it.........!

Well either way, I think these things make way too much noise.... I KNOW new preludes didnt make this much noise when they were new.. my rockers look fine.. Im just thinking I did have to shim them 0.040'' They were about 0.040'' shorter than the older ones too btw.</TD></TR></TABLE>

u cant just adjust the valves?

 

I did adjust them.. I did it where there was a small amount of drag, so it slides smoothly in between the cam and lobe

 

thats where you are wrong. When doing a valve adjustment, you need to adjust them to .008 to intake and .006 on exhaust.

use .009 to check the intake
use .007 to check exhaust

i adjusted mine to those specs and check feeler should barely be able to be slid into the clearance and my valves have little to no chatter.

 

i used .008 on exhaust and 0.007 on intake PER THE HELMS.. Ill try and readjust them tomorrow, but I am positive the noise is the lifters not being tall enough....

 

Ok, Im in the process of readjusting the valves.. And I stumbled across something interesting...

If I put a piston on TDC, the middle lobe (vtec lobe) just flops around!! theres about a .040-0.045'' gap between the middle rocker and cam!!!!!

This is 100% hard evidence I have to shim these newer LMA's. There is no way that a gap like that can be good for the lma's or the rocker...

 

There are so many"experts" on the internet that speak with a lack of experience.

"Mykizism" is wrong. The pockets for the LMAs are different. Use a caliper and you will find that the 98+ heads are machined deeper.

To use the non encapsulated LMAs in a early head, you will need to use shims.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2point6 &raquo;</TD></TR><TR><TD CLASS="quote">There are so many"experts" on the internet that speak with a lack of experience.

"Mykizism" is wrong. The pockets for the LMAs are different. Use a caliper and you will find that the 98+ heads are machined deeper.

To use the non encapsulated LMAs in a early head, you will need to use shims.</TD></TR></TABLE>

thats nice to know

scott, are there any more differences like this between the a1 and a4 heads?

 

correction.... 98+ head LMA holes are machined shallower. Sorry for the mistype.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2point6 &raquo;</TD></TR><TR><TD CLASS="quote">correction.... 98+ head LMA holes are machined shallower. Sorry for the mistype.</TD></TR></TABLE>

I was gonna say..
That sounds more like it.

2point6, I'm normally on Hondasociety, and I've been following your N/A h22 threads for sometime now. I sent you an IM here on HT about this whole shimming newer lmas thing... I dont know if you got it or not.. Eitherway, I know you that have serious experience with these heads, and I wish you replied much earlier (having assembled my head without shimming them first) before I had to reassemble them with shims.. I'm glad to say after a overheating scare (funky rad cap) I am still running quietly and smoothly.
Thank you guys for helping me out.
B.Rabbit, I would like to meet up with some other h22 dudes in central FL sometime.. I want to get my p28 dyno tuned!

 

we are having a meet in Melbourne on march 10th

http://www.sfpoa.net