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valve settings

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Old Apr 28, 2010 | 06:55 AM
  #1  
84z5350's Avatar
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From: jefferson,ny
Car: 1986 z28
Engine: 350
Transmission: 700r4
Axle/Gears: ?
valve settings

i recently swaped heads on my 92 383 and now cant get valves to stop clattering ive adjusted by what all my different books say but each says somthing different does any one now the correct way to set them.i am using a roller cam with stock rockers.the rockers are not original to this cam should i have used them or does that not matter
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Old Apr 28, 2010 | 07:19 AM
  #2  
305sbc's Avatar
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From: Fairview Heights Illinois
Car: 1986 Irocz
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3.25:1
Re: valve settings

Originally Posted by 84z5350
i recently swaped heads on my 92 383 and now cant get valves to stop clattering ive adjusted by what all my different books say but each says somthing different does any one now the correct way to set them.i am using a roller cam with stock rockers.the rockers are not original to this cam should i have used them or does that not matter
What lifters and springs?
If you're using stock roller lifters with performance valvesprings, then there's your problem.
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Old Apr 28, 2010 | 07:45 AM
  #3  
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From: jefferson,ny
Car: 1986 z28
Engine: 350
Transmission: 700r4
Axle/Gears: ?
Re: valve settings

ok it is a stock roller cam stock springs stock rockers nothing performance i was not the one who built the bottem half it was still tbi top with a 383 bottem i put on older bigger heads and swaped it to a 4 bbrl edelbrock carb
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Old Apr 28, 2010 | 08:50 PM
  #4  
game1939's Avatar
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Joined: Feb 2010
Posts: 162
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From: savannah, ga
Car: 91 chevy camaro
Engine: 383
Transmission: 700r4 built with corvette servo
Axle/Gears: posi 3:73
Re: valve settings

Here are step by step instructions:
  1. Remove the valve cover.
  2. Identify the number one cylinder. Turn the engine over until you see the number one cylinder exhaust valve rocker arm JUST START to move from the closed position to open. You may need to turn the motor over a couple of times to reach this point, but do not turn any further.
  3. Locate the intake valve.
  4. Loosen the rocker arm adjustment nut until you feel some obvious lash or clearance in the adjustment.
  5. Using the thumb and index finger of one hand, grasp the intake push rod below the rocker arm, and rotate it back and forth (clock-wise and counter clock-wise successively to be sure there is no remaining pressure on the push rod from the rocker arm as you loosen the rocker arm adjusting nut.
  6. Using the other hand, while continuously performing step 6, with a 5/8 socket and ratchet, tighten the rocker arm adjustment nut slowly until you feel a resistance of motion on the push rod.
  7. This will be the zero lash adjustment point. For hydraulic lifters, tighten the rocker arm adjustment nut 3/4 of a turn. For solid lifters, back off the rocker arm adjustment nut until your feeler gauge just fits under the contact point between the valve stem and the rocker arm. Fine tune the adjustment by checking it with a feeler gauge just slightly thicker than the preferred clearance to be sure the clearance is not greater than it should be. If the larger feeler gauge will fit, it needs to be re-adjusted. A lash tolerance of 1-2 thousandths of an inch in the valve adjustment for solid lifters would be acceptable since it may be difficult for someone who is in-experienced to be more precise than that.
  8. Turn the engine over until the intake valve opens and then is almost closed.
  9. On the exhaust valve, repeat steps 5 through 8 for the exhaust valve adjustment.
  10. Repeat this procedure for each cylinder. Be sure to do each cylinder sequentially, either following the firing order, following the cylinders numerically, or in the case of a V8 doing one side of the engine at a time. I prefer to do one side of the engine at a time.
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Old Apr 29, 2010 | 08:55 AM
  #5  
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From: jefferson,ny
Car: 1986 z28
Engine: 350
Transmission: 700r4
Axle/Gears: ?
Re: valve settings

good morning guy's ok last night i got the valves set to 1/2 turn past zero car runs great i do hear what i think is just valve train noise.is there such a thing with stock rockers? but when i put valve covers back on i can than hear ticking noise.is this normal when running aluminum covers?they are micky thompson's is any one else running theese and do u have noise i wondering if i should try different covers see what i get.and do roller rockers make alot of noise i was thinking of just putting those on.than i got a reason for valve train noise
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