Valve lash stock

Andreas

Andreas

New member
Hi forum.

I've put my motor back together and I would like some help with set the valve lash for the first start up.

I've read the posts that i could find here and they all (from what I found) concerned aftermarket roller rockers.

How about the stock rockers? is it the same procedure?

found this link at paceparts
http://www.paceparts.com/index.asp?PageAction=Custom&ID=637

From what I've read it seems that after zero lash a 1/2 turn is recomended

If any one has a link to a good thread please post it, I would be greatful.
 
myclone

myclone

Donating Member
Re: Valve lash stock

Andreas said:
Hi forum.

I've put my motor back together and I would like some help with set the valve lash for the first start up.

I've read the posts that i could find here and they all (from what I found) concerned aftermarket roller rockers.

How about the stock rockers? is it the same procedure?

found this link at paceparts
http://www.paceparts.com/index.asp?PageAction=Custom&ID=637

From what I've read it seems that after zero lash a 1/2 turn is recomended

If any one has a link to a good thread please post it, I would be greatful.
Click to expand...

Half a turn past zero is usually perfect. To get to zero lash just spin the push rod between your thumb and fore finger while tightening the rocker down. Once you feel resistance to spinning the push rod youre at zero lash. Just make sure the cam is on the base circle (no lift) for the valve youre adjusting/
 
Andreas

Andreas

New member
Re: Valve lash stock

I guess this is what you mean with base circle.

A. Starting with #1 cylinder, turn the engine over until the exhaust pushrod just begins to move up.

B. At this point, stop and adjust the intake valve on the same cylinder.
 
Try Me

Try Me

New member
Re: Valve lash stock

just remember this, follow this for each cylinder and you'll be fine. plus this works for pretty much any engine.

when the exhaust valve starts to open, adjust the intake.

when the intake valve starts to close, adjust the exhaust.
 
Don W.

Don W.

Stab it and steer it
Re: Valve lash stock

OK, yur making a lot of work out of this.

For a stock engine bring the engine up to TDC #1 by watching the valves of NUMBER 4 cyl. Number 4 valves will be moving, number 1 won't. At this time adjust the following:

Exhaust valves cyl 1,5,6
Intake valves cyl 1,2,3

Turn the engine one full revolution and adjust the following:

Exhaust 2,3,4
Intake 4,5,6

The correct preload after -0- lash is ONE full turn. This centers the hyd lifter in its travel.

Personally I prefer a slightly different method but it requires two full turns so this is easier.:tup:

If you want to know why you're watching number 4 you'll have to ask.;) The answer works on any engine regardless of configuration. (Must be even fire if V6)

Enjoy...
 
Andreas

Andreas

New member
Re: Valve lash stock

Don, I'm a skinny guy who needs alot of workout haha, just kidding.

Great procedure for adjusting valves , I would be turning that motor all day otherwise.
Thanks Don for the great input.
 
Don W.

Don W.

Stab it and steer it
Re: Valve lash stock

Since no one chimed in on my question as to why you watch number 4 I'll tell you anyway. In any 4 stroke cycle engine of 2 cyls or more the pistons run in pairs. If adjusting valves for example you need to know which cyl runs with number one so you can watch those valves when adjusting number one. The "trick" is to write down the firing order like this.

Our trucks fire 165432 so you'd write:

165
432

1&4 travel together, 6&3, 5&2

An in-line 6 commonly fires 153624

153
624

1&6 together and so on

SB Chev

1-8-4-3-6-5-7-2

1843
6572

Now you can impress your friends with some more almost useless trivia...:lol:
 
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