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adj. push rod ???

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Old Aug 22, 2007 | 12:54 PM
  #21  
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Default RE: adj. push rod ???

Here is a pic of an old lifter I had that I just dissasembled. It still had oil in it.

[IMG]local://upfiles/29576/C47A41AEAEC24A6495137DD6DBF4F06B.jpg[/IMG]
 
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Old Aug 22, 2007 | 01:15 PM
  #22  
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Default RE: adj. push rod ???

Here it is bled down a reassembled. To bleed it I had to tap the checkball in the bottom of the lifter and let the oil run out. The red arrow (if you can see it) points to where you need the preload clearance.

[IMG]local://upfiles/29576/E20C07D831E4442F9E6C84DD713F9885.jpg[/IMG]
 
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Old Aug 23, 2007 | 12:39 AM
  #23  
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Default RE: adj. push rod ???

ok so i need to do that to all of the lifters b4 i start the motor, i was playing with the adj. push rod to day and turning the motor over by hand , and using the sharie trick i noticed that the rocker arm didnt really move or erase from the intake to the exhuast that much, and it never really got to the middle. It starts on the intake side and moves to the middle slighty but dosent go to the middle. could this little movement be b/c of the lifter or does it just simply not move that far?

and again i thank all of the help b/c i m simply retarded with this valvetrain stuff
 
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Old Aug 23, 2007 | 09:51 AM
  #24  
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Default RE: adj. push rod ???

You don't need to do all of that at all unless you don't have the preload clearance. I wascurious to see if the old lifter would still be pumped up or not.As you can see, there isn't much to that clip. If you allow the lifter seat to pump right against it, it will eventually fail.

When you hand crank the motor, is the lifter pumped up or is the seat descending into the lifter shell? This is the idea behind a mock-up lifter. To keep the lifter seat exactly where it would be during normal motor operation for the purposes of measuring pushrod length and checking valvetrain geometry. Anyway, now that we're sure that horse is dead, if the seat is not descending into the lifter, then you obviously have the pushrod adjusted wrong. The tip has got to travel through the center of the stem or you will end up with premature valve guide wear.
 
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Old Aug 23, 2007 | 10:35 AM
  #25  
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Default RE: adj. push rod ???

lifter is pumped up and doesnt move down,so that is a good thing for the measuring area, when i go and install the new push rods can i leave the lifts b/c that is how they will get anyway?

 
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Old Aug 23, 2007 | 11:45 AM
  #26  
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Default RE: adj. push rod ???

Yes, as long as you have the .060 preload. It can vary a little in either direction but .060-.070 will give you a quiet valvetrain where you don't have to worry about lifter pump.
 
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Old Aug 23, 2007 | 12:58 PM
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Default RE: adj. push rod ???

ok so the lifters are good as long as they are not touching the clips, i just need to adj the adj. push rod so the rollers move through the center of the valve stem from intake to exhuast.
 
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Old Aug 23, 2007 | 02:47 PM
  #28  
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Default RE: adj. push rod ???

No. That is not a true statement.

On hydraulic lifter cams you adjust for preload.You do not want the pushrod seat in the lifter to pump all the way up against the retaining clip (too little preload) because the clip will eventually break, nor do you want the pushrod seat too far down so that the lifters over pump duringhighrevs and cause piston slap. Too little preload will be noisy as well.
After that:

i just need to adj the adj. push rod so the rollers move through the center of the valve stem from intake to exhuast.
Is a true statement.

 
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Old Aug 23, 2007 | 07:49 PM
  #29  
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Default RE: adj. push rod ???

well i feel better
thanks i will let you guys know how it goes
 
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