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lifter preload question

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Old Jun 26, 2011 | 10:56 AM
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Default lifter preload question
Ok guys I'm having some random noisy lifter ticks

I've got a lunati cam and springs with stock rockers and pushrods

From zero lash I have a little less the 3/4 aturn on the rocker arm bolt till full tourqe is this enough? Too much?
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Old Jun 26, 2011 | 11:08 AM
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The accepted range is from 1 1/4 to 1 3/4 turns.


https://ls1tech.com/forums/15069830-post21.html
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Old Jun 26, 2011 | 11:12 AM
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Originally Posted by Darkman
The accepted range is from 1 1/4 to 1 3/4 turns.


https://ls1tech.com/forums/15069830-post21.html
Thanks I've searched for a hour and couldn't find it, any ideas how much longer they will need to be?
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Old Jun 26, 2011 | 11:18 AM
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Originally Posted by 74yellowmav
Thanks I've searched for a hour and couldn't find it, any ideas how much longer they will need to be?
At least 0.25" longer -

"For an example, if you use a 7.400" pushrod and come up with 3/4 of a turn, you will need at least .025" longer pushrod to get into range. If you end up with 2 1/4 turns, you will need one .025" shorter..."
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Old Jun 27, 2011 | 07:07 AM
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Originally Posted by Darkman
At least 0.25" longer -

"For an example, if you use a 7.400" pushrod and come up with 3/4 of a turn, you will need at least .025" longer pushrod to get into range. If you end up with 2 1/4 turns, you will need one .025" shorter..."
Sorry I had my stupid hat on yesterday, having to surf the net from my crappy phone makes me miss some things from time to time, I ordered some 4.125 pushrods last night
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Old Jun 27, 2011 | 07:29 AM
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Originally Posted by 74yellowmav
..I ordered some 4.125 pushrods last night
I somehow doubt that.
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Old Jun 30, 2011 | 11:23 AM
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The 7.425's gave me exactly 1.5 turns preload

Most of the noise is gone still have one on the driver side giving some noise I think its a lifter issue
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Old Jul 1, 2011 | 07:20 AM
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The problem was the oil pump o ring, swapped it and gained a load of oil pressure and noise is gone
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Old Jul 2, 2011 | 12:09 AM
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Originally Posted by 74yellowmav
The problem was the oil pump o ring, swapped it and gained a load of oil pressure and noise is gone
What was your oil pressure before and after?
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Old Jul 2, 2011 | 07:24 AM
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Originally Posted by speedtigger
What was your oil pressure before and after?
20-25 idle before, 40 to 3k, sometimes would go 60 but rare occasion with 10w40 and lucas

Now I have 35 at idle and 60+ at 3k with 5w30 with nothing added
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