LS1 Valve Lash Procedure?

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May 17, 2014 | 08:01 PM

tron_

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LS1 Valve Lash Procedure?

I am in the process of building an LS1 for my 1993 Nissan 240sx. Here is a list of relevant mods:

-TSP 228R cam
-TSP stock length push rods
-PRC stage 1.0 heads
-LS7 (I think) hydraulic lifters
-Stock LS1 rockers

I was wondering if there was some info out there as to how to set my valve lash on this engine. I know on a stock LS1 you can just torque everything to 22ft-lbs and call it good but I was wondering if I could get away with that here.

Thanks!

May 17, 2014 | 08:45 PM

Darkman

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https://ls1tech.com/forums/7957678-post2.html

May 17, 2014 | 11:57 PM

big hammer

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From: over dere

Quote:

Originally Posted by tron_

basically after zero lash, your rocker bolt needs to tighten up between 1\4 to 1 full turn.

May 18, 2014 | 09:42 PM

tron_

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Quote:

Originally Posted by Darkman

https://ls1tech.com/forums/7957678-post2.html

Forgive my lack of understanding here but doesn't this article explain how to measure push rod length?

May 18, 2014 | 09:46 PM

high impact

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Pushrod length determines the preload. Technically op isn't setting lash, he needs to establish the correct preload since it is a hydraulic cam. Lash is used for a solid lifter.

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