LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

rocker arm fell off spring

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Old Feb 16, 2007 | 07:15 PM
  #1  
ZL1modified's Avatar
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From: PA
rocker arm fell off spring

i think i found out where that sound was coming from...

holy hell... how did this happen? i didn't even mess with these guys...

the push rod looks straight...

can i reuse it?

any suggestions

[IMG][/IMG]

[IMG][/IMG]
Old Feb 16, 2007 | 07:21 PM
  #2  
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From: Kantuckee Yo'
The rocker was loose and it slipped off. The end of the rocker is self aligning, thats the purpose of those two small raised ridges to keep it on the valve.

Look at the top of the valve stem and make very sure it is still flat and NOT rounded over.

This happened to me with a roller rocker and the valve stem was damaged and had to be replaced.
Old Feb 16, 2007 | 07:40 PM
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the push rod looks strait and the valve stem looks flat...

i ran it for a bit like that...

do you think i could just try to put it back on and adjust all of the rr's?

do you suppose the lifter is collapsed?
Old Feb 16, 2007 | 07:43 PM
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very closely inspect the valve spring, a broken spring can do the same thing
Old Feb 17, 2007 | 05:35 AM
  #5  
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ok, i take it that it is not a big deal or means that something terrible is wrong...

thank you for your help guys
Old Feb 17, 2007 | 07:24 AM
  #6  
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From: Kantuckee Yo'
You might think about getting some roller rockers with poly locks or just poly locks at a minimum. The poly locks make setting proper rocker lash a lot easier.
Old Jul 15, 2007 | 12:19 AM
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What are poly locks?
Old Jul 15, 2007 | 05:31 AM
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SS RRR's Avatar
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From: Jackstandican
Originally Posted by Oxygen454
What are poly locks?
Google is such a wonderful tool:

http://www.speedwaymotors.com/eccSto...15-99788_L.jpg

You see the allen screws in the center? Those are poly locks. After adjusting the rocker nut the poly lock is then tightened down to keep the adjusting nut from backing off.
Old Jul 15, 2007 | 05:45 AM
  #9  
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Thanks for the info! Great pic too. Will give that a shot, Im guessing they are somewhat inexpensive?
Old Jul 15, 2007 | 08:03 AM
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From: Lexington Park, Maryland, USA
ZL1modified,
when you put it back together pay close attention to the motor when you go WideOpenThrottle.
Usually, when a rocker falls off it's due to the engine being in detonation....(most call it rattle). A bit too lean or too much timing when at WOT will make the motor rattle (overly aggressive PCM tune). Oil pump pickups, oil pump drive gears, broken valve springs, rockers falling off, that's all the indication of rattle.
At least that's been the case with my junk.

Karl
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