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  #16 (permalink)  
Old 07-26-2013, 12:33 PM
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Yeah. REAL good first post there, dingleberry.

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Old 07-28-2013, 11:08 AM
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Well, apon diagnosing the motor and the offending valve, i think i have discovered the issue.

The exhaust valve on the cylinder is not opening( Explaining the black sooty stuff on the plug)

There is no tension on the push rod, and its feels springy.

Im guessing that's a spring retainer to hold the push rod in place while the lobe circles around, when the lobe makes its rotation i don't feel much pressure against the rod, so im thinking the lobe is worn down.

What do you guys think? Here is a video, of the push rod

http://youtu.be/ZKspSkCZkT0
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  #18 (permalink)  
Old 07-28-2013, 11:45 AM
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Could be your lifter has collapsed,or,not priming up.
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Old 07-28-2013, 11:49 AM
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I just watched the video & that lifter be that easy to push down.Unless you are really strong.LOL.If the lifter is bad,you're,not gonna feel much movement from the cam becuz the lifter is bottoming out befor you notice any lift from the cam.
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Old 07-28-2013, 12:21 PM
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Yeah i work out 'er day, lil push rods are like twigs to me.


Guess the intake manifolds going to come off, can the hydraulic lifter be removed from the topside?
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  #21 (permalink)  
Old 07-28-2013, 12:29 PM
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Yes,after you pull the intake,it can be removed.
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Old 07-28-2013, 12:34 PM
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Do you think its the lifter that's bad?

just read here that lifters need to be primed or something ,is it possible that i somehow squished the oil out of it and that's why its acting up now?

this is what i read

Chevy 350 hydr lifters ? - Yahoo! Answers
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Old 07-28-2013, 12:37 PM
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Also just wanted to thank you guys for the input and help. Learning as i'm going
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  #24 (permalink)  
Old 07-28-2013, 01:06 PM
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It's possible that with the procedure your friend supplied that you coulda collapsed it especially if the lifter wasn't on the base circle when you tightened it down.Ck the pushrods adjacent to that 1 & see how they feel.if the lifter is good,it should prime with proper adjustment.The problem is,you can't really get proper adjustment with it collapsed.You could reinstall rocker being certain that lifter is on base circle of cam.Tighten it down until there is no slack in pushrod.you should be able to spin the pushrod with slight effort,then 1/2 to 3/4 turn farther.If the lifter doesn't prime & start operating the valve after starting,the lifter is prolly bad.You can start it with VC off to watch the movement.Just be careful of hot oil.Also,watch that rocker to see if oil is being pumped up thru the rod to the rocker.
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Old 07-28-2013, 01:14 PM
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Also,ck the pushrod to make sure it's straight.If the lifter was on a lobe when tightened the rocker down as your friend described,you easily coulda bent the rod or damaged the lifter internally.Lay the rod on a flat surface & roll it to ck if it's bent.
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Old 07-28-2013, 01:26 PM
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The springy feel you show & describe is the lifter valve depressing.If it were primed,you wouldn't be able to push it down so easily.Also,oil should pump up thru the rod when you depress it.The lifter not only transfers cam movement up thru the pushrod to the rocker & then the valve,it is also a pump that delivers oil to your rockers & other valvetrain parts.
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Old 07-28-2013, 02:21 PM
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Alright, so i just pulled off the intake manifold. Pulled out the lifter, and i found the issue. Im guessing this is due to the over tightening of the rocker like you suggested. The cam shaft seems fine from what i could see through the hole.

Should I replace just the one lifter? or buy a kit and replace all of them?

I see on summit racing, a set of hydraulic roller lifters, would these be better for me? or should i just get a non roller replacment

VIDEO0015 - YouTube



VIDEO0015 - YouTube

Last edited by fang_x; 07-28-2013 at 02:29 PM.
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  #28 (permalink)  
Old 07-28-2013, 02:32 PM
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Looks like you'll be needing a cam & new set of lifters.I'm pretty sure with that kinda damage to the lifter,that the cam is toast as well.As I said earlier,if the lifter was not on the base circle of the cam when you tightened rocker down as you described,it was too tight.It would only take a short time to cause damage.the cam lobe is most likely destroyed.You most likely also have metal shavings floating around in the oil as well.
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  #29 (permalink)  
Old 07-28-2013, 02:57 PM
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Is this a new cam that you have just recently installed.If so,were the proper breakin procedures followed & new lifters used?What type of oil are you using?
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  #30 (permalink)  
Old 07-28-2013, 03:06 PM
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[QUOTE=fang_x;1698937]Alright, so i just pulled off the intake manifold. Pulled out the lifter, and i found the issue. Im guessing this is due to the over tightening of the rocker like you suggested. The cam shaft seems fine from what i could see through the hole.

Should I replace just the one lifter? or buy a kit and replace all of them?

I see on summit racing, a set of hydraulic roller lifters, would these be better for me? or should i just get a non roller replacment

VIDEO0015 - YouTube

. You can't use roller lifters with a flat tappet cam.You do have a flat tappet cam? Roller lifters can only be used with a roller cam.The type lifter you have is for a flat tappet cam.
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