roller rocker valve lash adjustment - Forums at Modded Mustangs
 
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post #1 of 8 Old May 13th, 2007, 10:43 PM Thread Starter
 
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roller rocker valve lash adjustment

I understand how and in what order to adjust the valves. I have a crane roller rocker setup and they want 1/2 to 1 turn past zero lash. It is a non-daily driven 347 with a hydraulic roller cam, and I have always heard various opinions on valve lash. I was going to go with 1/8 past zero but that still feels a little loose. Any suggestions?
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post #2 of 8 Old May 14th, 2007, 12:36 AM
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Do one cylinder at a time. When the exhaust valve starts to open, adjust the intake rocker arm. When the intake valve starts to CLOSE, adjust the exhaust rocker arm. Rotate the pushrod and tighten the poly lock until you start to feel tension on the pushrod. Then go 1/4 turn tighter.

My daily driver has 16 cylinders and 4400hp @ 1000 rpm....


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post #3 of 8 Old May 14th, 2007, 10:16 AM
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Same with trickflow zero lash?
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post #4 of 8 Old May 14th, 2007, 10:33 AM
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Quote:
Originally Posted by ken5_0
Same with trickflow zero lash?
This is the same for all hydraulic cams. This is how you adjust solid cams as well but you set valve lash instead of preloading the lifter.

My daily driver has 16 cylinders and 4400hp @ 1000 rpm....


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post #5 of 8 Old May 17th, 2007, 10:41 AM
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Thanks. When is the next performance 101 class?
Oh and cant you just set the lash when the cam is off lobe? or is it best to do one intake and exhaust at a time? pretty easy to see if it is off lobe.
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post #6 of 8 Old May 17th, 2007, 10:33 PM
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Quote:
Originally Posted by ken5_0
Thanks. When is the next performance 101 class?
Oh and cant you just set the lash when the cam is off lobe? or is it best to do one intake and exhaust at a time? pretty easy to see if it is off lobe.
You can do it however you want. They method I mentioned is easy and accurate.

My daily driver has 16 cylinders and 4400hp @ 1000 rpm....


***1988 Mustang GT - Stock....almost
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post #7 of 8 Old May 20th, 2007, 12:49 AM
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Quote:
Originally Posted by ken5_0
Thanks. When is the next performance 101 class?
Oh and cant you just set the lash when the cam is off lobe? or is it best to do one intake and exhaust at a time? pretty easy to see if it is off lobe.
Is it easy to see 0.010"?? I wouldn't want my preload off by more than that!

If you do this wrong, you'll wish you did it right while you are cleaning what used to be a cam lobe out of your oil pan. If you adjust the intake when the exhaust is opening and the exhaust when the intake is closing you will be 100% sure that the cam is off lobe.
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post #8 of 8 Old May 20th, 2007, 12:51 AM
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damn darrell.

you know everything.




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