L35 Rocker ?

[johnboy89]

Just put my L35 heads on with the stock L35 rockers and pushrods. From what I read these rockers are the non-adjustable type. The problem I'm having is that cylinders 1 & 5 it appears that I cannot adjust the rocker all the way down, if I do it opens the valve.

Is it ok not to adjust all the way down or do I need a custom pushrod on these?????

Thanx

 

[It's just a six]

Re: L35 Rocker ?

Most likely the valve tips were not all the same height.

You can most likely use a polly lock nut,the ones that can allow you to set the preload on the lifter & lock the center w.an allen wrench.Fellas?

http://www.speedwaymotors.com/Rocker-Arm-3-8-Inch-Poly-Locks,739.html

 

[johnboy89]

Re: L35 Rocker ?

If you are using used lifters, they may be full of oil, and not bleeding down. If the intake is off, you can observe whether the inner plunger is being fully depressed compared to the others that are fine.

I think they are full of oil and not being depressed as the others are moving and these are not. How do rectify this, will they free up after I prime the engine??? The intake is currently installed and are used lifters.

Thanx

 

[Try Me]

Re: L35 Rocker ?

I had polys on my vortec heads with stock valve covers, but vortecs may be different :dunno:

Also, with hydraulic lifters if you adjust them bled down, they will just pump up when the motor gets oil pressure and hang the valves open.

Even without poly locks you should be able to adjust them proper and the nuts should not back off, if they do throw them away cause they are worn out. They should be like a locking nut going on.

 

[Try Me]

Re: L35 Rocker ?

All the above is incorrect for an L35 valve train. L35s do not use a locking nut. The nut gets bottomed against a shoulder on the rocker stud. They do not "adjust" per se. Tolerances and length are calculated to stack up correctly by turning the nut down until it bottoms. You cannot adjust L35 valve gear like the stock heads, or the "regular chevy way" that has an adjustable valve train. L35s don't have an adjustable valve train.

Hydraulic lifters do not "pump up". By design, they can't. On the down stroke the piddle valve opens, and oil bleeds off through the push rod. Believe it or not, they really do self-adjust on every stroke.

Huh good to know. I never had l35's on my truck. I figured they would be the same as every other "old school" chevy hydraulic lifter setup. I cant tell you how many guys i have rescued because they over tightened the rockers on dry lifters, had them pump up, and hang the valves open so the motor would not start.

What you describe is how the new LS motors are. You just tighten the rockers down to the head (the ls has almost like shaft mounted rockers) and thats it. You either put aftermarket adjustable rockers on or get different length pushrods if you need it.

 

[johnboy89]

Re: L35 Rocker ?

If the intake was off, I would suggest taking them out, taking the clip out and take them apart and clean them.

Torque them down. Leave them overnight. See if it's better in the morning. If your positive that's it, it will be OK when you start it. But they should leak down overnight if they are under tension. Try it.



You're welcome. You have to get this running by the end of the month. That will be just about one year since it last ran. I'll help where I can.

You were right they did bleed down overnight and look fine now.........

Can't believe it's been almost a year, was bad timing when this went as I had another project I was working on (see below) and the machine shop sat on this thing for months.

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