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PostPosted: Sat Mar 16, 2019 7:40 pm 
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Joined: Mon Nov 19, 2012 8:53 pm
Posts: 54
I have the platinum yella terra rockers on my clevor part# YT6321. I need to know step by step how to set the vale lash along with the torque specs on these type rockers. I broke the adjusting screw torquing down the nut.I must be doing something wrong. Also my cam card calls for .016 hot so i have trying to set them at .010 cold would that be rite.
Thanks Rod


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PostPosted: Sat Mar 16, 2019 11:34 pm 
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Rod, how far is your adjuster out?
Too far and you'll break them.
I try and aim to have the most minimal amount , around 1-1 1/2 turns max.
I've run them with 700 lbs nose pressure like this without an issue.


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PostPosted: Sun Mar 17, 2019 5:26 am 
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Iron block with aluminum heads, set the cold lash about .006" tighter. All-aluminum engine, set them about .015" tighter. On an all-iron engine, lash will change little if any at all.

I've never "torqued" the nut, I always just use a wrench and tighten it up.

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PostPosted: Sun Mar 17, 2019 8:07 am 
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The paper i have says 3/8 adjuster locknuts torque to 35 lb/ft. I have about two threads showing above the nut when tite. Is the nut on the adjusting screw a locknut or posilok. The paper says 3/8 and 7/16 posiloks set lash .002 larger then required. Tighten grub screw to 15 lb/ft then tighten grub screw and posilok nut together to required lash. I do not understand how you can do that without your lash going .000. I take it the grub screw is the adjusting screw? Thanks for the help.

Rod


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PostPosted: Mon Mar 18, 2019 9:38 am 
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I've used those for many years on my monster truck customers engines(big Fords) with no problems. I torque the stands down to the head at 50lbs/ft but I've never "torqued" the adjuster nuts other than to use a short end wrench. They don't need to be extremely tight and while I've never had a Yella Terra rocker break I have seen Jesels broken from overtightenning of this nut. In fact Jesel warns about doing this in their instructions.


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PostPosted: Mon Mar 18, 2019 10:57 am 
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blykins wrote:
Iron block with aluminum heads, set the cold lash about .006" tighter. All-aluminum engine, set them about .015" tighter. On an all-iron engine, lash will change little if any at all.


Well, I "knew" that but now I need to go re-run my valves LOL because I did it all wrong. Dang it.

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PostPosted: Mon Mar 18, 2019 4:28 pm 
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Thanks guys for all the help. I will only use a wrench on the adjuster nut from now on.
Rod


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