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adjusting valves

shorepatrol2

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shorepatrol2 Enthusiast

shorepatrol2

Posted
Posted

Are the valves adjustable on a 97 5.7 . I've got a tick somewhere and after I change the donut gaskets on the exhaust I figured checking for a rocker arm nut that maybe backed off alittle.

97chevy350 Enthusiast

97chevy350

Posted
Posted

I am pretty sure that they are, I have had the valve covers off of my 97 and if i remember correctly they are adjustable, however I believe the NBS trucks with the 5.3 s are no adjustable.

redvett Senior Enthusiast

redvett

Posted
Posted

No the lifters are rollers and there is no adjustment. There is a collar on the rocker stud and the nut is tightened down tight.

tubby_in_texas Enthusiast

tubby_in_texas

Posted
Posted

if you have the LS series motor I believe their is no adjustment. But be sure pop the valve cover and look at the rocker arm. if it does not have an adjustment at the oiling hole for the push rod the only adjustment is the rocker arm nuts and are torqued to manuf. specs.

 

comp cam and harland sharp make adjustable 1.7:1 roller rockers and are a bit pricy

 

 

I hope this helps

shorepatrol2 Enthusiast

shorepatrol2

Posted
  • Author
Posted

if you have the LS series motor I believe their is no adjustment. But be sure pop the valve cover and look at the rocker arm. if it does not have an adjustment at the oiling hole for the push rod the only adjustment is the rocker arm nuts and are torqued to manuf. specs.

 

 

 

 

 

Its a 97 vortec in a yukon, I'm hoping it's something simple like the exhaust donut or a loose rocker , If not ,I don't know where to look next, It's a tick that gets louder the more load you put on the motor. any help appreciated

mcreyaufmiller Senior Enthusiast

mcreyaufmiller

Posted
Posted

From the Helm's Manual:

 

With the Engine in the number 1 firing position, adjust the exhaust valves for cylinders number 1, 3, 4, and 8 and the intake valves for cylinders number 1, 2, 5, and 7.

Turn the valve rocker arm nut counter clockwise until the valve lash is felt in the valve pushrod.

Turn the rocker arm nut clockwise until all of the valve lash is removed (zero valve lash).

Zero valve lash can be felt by moving the valve pushrod up and down between your thumb and forefinger until there is no more up and down movement of the valve pushrod.

When all the valve lash is removed, then turn the valve rocker arm nut clockwise 1 additional turn (360 degrees).

 

 

With the engine in the number 6 firing position, adjust the exhaust valves for cylinders number 2, 5, 6, and 7 and the intake valves for cylinders number 3, 4, 6, and 8.

 

Follow the same steps as above.

 

 

Make sure the engine is cold, I like to do mine first time in the morning after the engine has sat all night. My old enging began to have the annoying chevy clicking until I followed these procedures and the noise went away!!!!!

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