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

valvetrain help, asap, a quick question, **

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Old Oct 10, 2004 | 10:07 PM
  #1  
Mystic97Z's Avatar
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Joined: Aug 2003
Posts: 704
From: Imperial, MO.
valvetrain help, asap, a quick question, **

le1 heads/joe o cam, the whole works
put in comp r lifters and comp 1.6 rockers. we adjusted the rockers to 1 full turn past zero lash. wasn't putting down the numbers it should and i posted in here a while back and was told to go in between 1/16th-1/8th/ or 1/4th past zero lash. so i backed them off 3/4 turn today, so they should be set at 1/4 past zero lash.

obviously the valvetrain was a little more noisy that a stock car (after the head/cam install), but now it sounds louder than it was before we adjusted them to 1/4 today., like they are too loose. is this common or is this a problem? i need help soon because i don't want to mess it up , to much $$ involved in it.

also, i personally haven't heard the car after adjusting them, my dad did.
he's been an ase certified tech for 25 years.
Old Oct 15, 2004 | 03:39 PM
  #2  
TransAmGT94's Avatar
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Joined: Feb 2004
Posts: 310
From: Evansville
Re: valvetrain help, asap, a quick question, **

Not sure how loud they are but ive heard they are louder than stock. Guess ill find out i have a set of comp r's going in as soon as the bottom end gets done
Old Oct 15, 2004 | 04:01 PM
  #3  
DDZ/28's Avatar
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Joined: Nov 2002
Posts: 74
From: Markham, ON
Re: valvetrain help, asap, a quick question, **

Did you just back them off?

Try setting them to 1/4 turn past zero lash instead (Back them off completely and then adjust).

I'm running my Comp R's at 1/8 past zero lash.
Old Oct 15, 2004 | 04:57 PM
  #4  
truedualws6's Avatar
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Joined: Jan 2004
Posts: 1,406
From: Downey, CA
Re: valvetrain help, asap, a quick question, **

As has been said many times in many threads regarding the Rs,
my lash is 1/8 turn (adjusted cold) past zero with 7/16" studs.

The car seems to run just fine. I'll have dyno info to post after
the 29th.
Old Oct 16, 2004 | 11:07 PM
  #5  
mebanditws6's Avatar
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Joined: May 2002
Posts: 622
From: Nashville, TN
Re: valvetrain help, asap, a quick question, **

Try resetting the lash to 1/8 past then maybe 1/16 or so past that if it's still really noisy. I wouldn't go past 1/4 or you'll probably start bending pushrods, but in worst case I'd rather be slightly too tight then too loose. Better to bend a pushrod then to drop a valve.

Jason
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