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

lifter noise??

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Old 09-28-2007, 08:56 PM
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Default lifter noise??

Just recentely I changed the cam, timing chain, all valvetrain and lifers and now I'm getting lifter noise. Did I not get my valve lash tight enough?? They are GM 1.6 RR with there springs. The lifters were Sealed Power from Napa. It kinda comes and goes???
Old 09-28-2007, 08:59 PM
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How does it sound..
I just had a Lifter collapse in my 402..trust me, that makes a very distinct sound..
Old 09-29-2007, 02:58 AM
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Well it's kinda slight and maybe it could be the rockers, I was told that sometimes RR will make noise but not for sure??
Old 09-29-2007, 08:54 AM
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It probably is...
Old 09-30-2007, 02:01 AM
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Do you think I should go back and give each rocker another 1/4 turn?
Old 10-01-2007, 12:02 PM
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Default lifter noise

Well I deffinately think it is the lifters making noise but now I not for sure on what to do?? Should I just tighten them up a little more?? I really heard them this morning, tick tick tick tick ect......
Old 10-01-2007, 01:00 PM
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I had similar issues but I used the method I had always used with no problems before. Basically I just went back over them and put another 1/8 turn on the nuts and seemed to cure it all up. I used the spin the pushrod method and had a 1/4 past 0 on them total. If you've never had roller rockers before, they are very noisy even when setup correctly.
Old 10-01-2007, 01:42 PM
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Yea roller rockers almost make you think something is f-up in the valvetrain. thats why you have to run the lt-4 knock module, which I hope you installed.
Old 10-01-2007, 02:05 PM
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Or tuned it out.
Old 10-02-2007, 07:23 AM
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my car has had SA rocker arms and NSA rocker arms, they all sound like 16 seperate sewing machines under my valve covers but you just have to get used to it.
Old 10-02-2007, 08:36 AM
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I read some crap somewhere that NSA were supposed to be quieter but I am not sure how that is!
Old 10-02-2007, 08:47 AM
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not really, the only difference is just using a guide plate for the pushrods vs having the rocker arms align themself. look for the lightest rocker arm, less mass=less sound. im using harland sharp rocker arms, they still make noise but i can not find anything lighter.
Old 10-02-2007, 10:18 AM
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Originally Posted by moserman
not really, the only difference is just using a guide plate for the pushrods vs having the rocker arms align themself.
Right, I understand. With the NSA setup, you've added friction with the pushrods touching the guideplates. Granted that probably doesn't make any noise, but there's no way that setup can be quieter.
Old 10-02-2007, 11:31 AM
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Default lifter noise

Well I think I'll just go back over them and just turn them another 1/8" turn. And no I don't have the LT4 Knock modual. I haven't had any other problems or a check eng. light?
Old 10-02-2007, 11:41 AM
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Originally Posted by alconk
Well I think I'll just go back over them and just turn them another 1/8" turn. And no I don't have the LT4 Knock modual. I haven't had any other problems or a check eng. light?
You wont get a check engine light, your knock sensor will pick up the roller rockers and retard timing=less power than before you put them on.
Old 10-03-2007, 11:21 AM
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holy crap.... I didn't know that!!!
Old 10-04-2007, 01:32 PM
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+1...I guess I need a lt4 knock modual.
Old 10-05-2007, 12:22 PM
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Is this a simple install in the PCM or will I have to have it retuned again??
Old 10-13-2007, 11:07 PM
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what rockers do you have
Old 10-13-2007, 11:09 PM
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Originally Posted by alconk
Is this a simple install in the PCM or will I have to have it retuned again??


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