LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Bent push rods and missing running like shit

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Old Jan 14, 2011 | 03:09 PM
  #21  
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ok
I used optiscope today to inspect lifters, from top, look perfect.
Through sparkplug hole piston top is not scarred, and.both valves look to be sitting flush.
Blew air in to cylinder, quiet, didnt hear any leaking.
Change oil tomorrow, and preload rockers, try starting newx week , gonna be above freezing tuesday or wednesday.
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Old Jan 14, 2011 | 06:31 PM
  #22  
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Originally Posted by cookietime
ok
I used optiscope today to inspect lifters, from top, look perfect.
Through sparkplug hole piston top is not scarred, and.both valves look to be sitting flush.
Blew air in to cylinder, quiet, didnt hear any leaking.
Change oil tomorrow, and preload rockers, try starting newx week , gonna be above freezing tuesday or wednesday.
Thats good to hear. it doesnt hurt to double check anything. GL
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Old Jan 14, 2011 | 07:27 PM
  #23  
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Good luck! I'm praying to the gods of pistons rods & stuff for you and your ride.

Post up the results.
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Old Jan 14, 2011 | 07:35 PM
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Originally Posted by cookietime
ok
I used optiscope today to inspect lifters, from top, look perfect.
Through sparkplug hole piston top is not scarred, and.both valves look to be sitting flush.
Blew air in to cylinder, quiet, didnt hear any leaking.
Change oil tomorrow, and preload rockers, try starting newx week , gonna be above freezing tuesday or wednesday.
You have to pressurize the cylinders with a spark plug adapter, not just blow air into them.
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Old Jan 16, 2011 | 01:02 PM
  #25  
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Talking Chinese ***** house

Weather finally cooperated. I changed to 5 -30 oil today. Also installed all new pushrods, preloaded rockers 1/2 turn. Adjusted with #1 tdc, then#6 tdc method.
I noticed all the compressed valve springs were almost coil bound, so i let then sit for 20 minutes and they loosened up. Hand turned the balancer (2 full revolutions)1/4 turn at a time, until they were all "looser".
I suppose that thick *** oil and the cold weather, tought me a f-ing lesson.


Cranked it up, runs like new.
Thanks for all the input guys
Oh yes Happy Ending lol
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Old Jan 16, 2011 | 01:08 PM
  #26  
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def check the compression and leakdown. i would also check the timing set to see if it is off. maybe a lifter twisted in its bore and seized up somehow. just find the issue b4 you start it back up.
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Old Jan 16, 2011 | 02:30 PM
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Originally Posted by cookietime
I noticed all the compressed valve springs were almost coil bound, so i let then sit for 20 minutes and they loosened up.
This does not make sense.

Originally Posted by cookietime
Cranked it up, runs like new.
Thanks for all the input guys
Oh yes Happy Ending lol
GREAT!Now go catch up on your cruising!
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Old Jan 16, 2011 | 06:02 PM
  #28  
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Paul is right, that doesnt make much sense. If they were almost bound then that means that the lifter when pumped up, will put it right there again. What lift are your springs rated for ?
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Old Jan 16, 2011 | 06:44 PM
  #29  
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Talking no sense

hell, i dont know, im not a tech.
just an old fashioned back yard mechanic, with a toy to tinker with.
My thinking is that heavyweight oil, turned to sludge, when cold, and wouldnt compress lifters????
Ran perfect before, runs nice now.
hell im happy
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Old Jan 16, 2011 | 07:14 PM
  #30  
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Originally Posted by cookietime
hell, i dont know, im not a tech.
just an old fashioned back yard mechanic, with a toy to tinker with.
My thinking is that heavyweight oil, turned to sludge, when cold, and wouldnt compress lifters????
Ran perfect before, runs nice now.
hell im happy
So, what cam, valve springs and rockers do you have there?
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Old Jan 17, 2011 | 01:20 AM
  #31  
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Default set up

comp cam 305, behive springs and retainers, 1.6 comp cam magnum roller rockers, & comp cam roller lifters
Link to springs:
http://cgi.ebay.com/ebaymotors/Chevy...Q5fAccessories

Last edited by cookietime; Jan 17, 2011 at 01:53 AM. Reason: adding link
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