Help! Do rocker arms have to match the cam shaft?
 

Hi,

I need some quick help, I've been reassembling my d16a1 today and everything has bene going smoothly but I've hit a road block. THe problem is when I go to adjust the valve lash after the timing is all set and everything, I'm sure it is correct. One of the rocker arms is pressed against the camshaft and can't be loosened any more. I have a feeling this is due to them having to be matched to there apropriate spot on the camshaft. I had them all laid out in the right order when I took them out but I have afeeling at the machine shop they were all mixed up! Is there any way for me to figure out where they go? Or is there another problem? DO they have to be in the right spot? What do you do when you get a new camshaft?

I'd like to get this finished tonight if possible... :(

Thanks,

Conor M.

Re:Help! Do rocker arms have to match the cam shaft?
 

The rule of thumb is that you replace followers when installing a new cam. The followers have wear patterns from the old cam, and can prematurely wear out a new cam.

Re:Help! Do rocker arms have to match the cam shaft?
 

All the followers on the ZC/D16a1 are the exact same.. intake/exhaust, and you shouldnt have to mark where they go. I just threw mine in a bag on my rebuild, and had no problems when putting them back together. It is better for wear if you had them on the original lobe to the camshaft. But as far as not even physically working at all? you got something else going on dude.


The only time you ever replace something is if you are working with a car that has hydraliuc lifters. I.E Older V8's/DSM's, basically dont want to get a flatspot in your camshaft. I have used differnt cams before without problems.. The followers on hondas hardly wear at all.

Jeff

Re:Help! Do rocker arms have to match the cam shaft?
 

You should check out the followers from one of the PR3 heads I have, major wear on them. The groove must be at least .010" deep.

Re:Help! Do rocker arms have to match the cam shaft?
 

Ahh, well then again I have hardly dont that much work on B-series valve trains.. other than mine/leias and Beaus. All were pretty good. I guess every single D-series I have ever taken apart (tons of motors) all with lots of miles, they have been in just great condition..

What other PR3 head do you have?

Jeff

Re:Help! Do rocker arms have to match the cam shaft?
 

Only have two, the one in the car and the one you guys have monkeyed with. The follower must have been made really soft on them for some reason.

Re:Help! Do rocker arms have to match the cam shaft?
 

Thanks for the quick responses! :)

I went ahead and installed everything again. Basically one of the intake valves on the #1 cyl. and an exhaust on the #3 have a valve lash of .001 instead of .005 I can't back it off at all because the treads on th e rocker arm are bottomed out :( This is really strange???? The vavles in question actaully looked like they were a hair taller than it pair? I went ahead and put everyhting back together though because there isn't any piston to valve interference. Very strange. I hope it runs ok any ideas on what going on? I tried multiple different rockers on the valves in question and it didn't change anything.

Again Thanks for being so quick.

Conor M.

Re:Help! Do rocker arms have to match the cam shaft?
 

It sounds like you had a valve job and the valve stems are in fact sticking up higher out of the head.

Re:Help! Do rocker arms have to match the cam shaft?
 

Yeah I did have a valve job, plus the valves and everything are new. Is this going to cause a problem did the machine show do something wrong?

Re:Help! Do rocker arms have to match the cam shaft?
 

i think someone made a boo boo!

Dane