Ok, my friend says after i break in my new 350 I'll have to go back in and adjust the rockers or something like that. Is that true, or is the initial lashing enough???

 

you'd want to re-adjust valve lash after a bit, especially with a flat tappet cam. just do it whenever it starts making noise. there is no rule of thumb.

 

I've never had to re-adjust the lash on a hydraulic cam.

 

I adjust my valves after every race.

-- Joe

 

Your running a hydraulic in a racemotor? why not step up?

 

Solid makes too much noise, and wears too much.

-- Joe

 

naaaah... you can't hear them over the gear drive anyway

 

Im not big on loud.. Not like I was 10 years ago anyway. My blower drives my crazy. A gear drive might drive me insane!

-- Joe

 

Depends on what cam you have and how you adjusted the valves. If you have a hyd. cam you will not have to re-adjust the pre-load IF you did it correctly. If it's a solid cam, you will most likely have to re-adjust after break-in. I always re-adjust mine (hyd.) after initial break-in with the motor up to temp and while it's running just so I know it's right.

 

Sometimes things stretch, and even hydraulic roller cams have some initial wear during break in.. I'd at least readjust it after breakin like the above guy mentioned.

And also do it while running.

-- Joe

 

How do you adjust the valve lash after you do it, the book im using has the before install valve lash adjustments, but doesnt go over what you have to do to adjust them afterwords. So direction would be great.

 

As exhaust just starts to open, adjust the intake, as the intake just starts to close adjust the exhaust. per cylinder, take the play out of the pushrod and then go 1/2 to 3/4 turn more. That's why I don' tunderstand why you would readjust hydraulic lifters, there's play there that is taken up by the lifter unlike a flat tappet that has a measurement value, such as .027 and .030.