how do you adjust the valves on a 1984 chevy truck with a 305 motor?

Answer 1

Take off the valve cover, Take out all the plugs. Do one cylinder at a time. Bump the engine until the piston is at top dead center at the two that you want to adjust. Loosen the rocker arm nut and then tighten it until the pushrod doesnt move up and down turn the nut 1 quarter turn only! Repeat until all cylinder are done.

Answer 2

The only way you would have to adjust the valves on a 305 is that someone has put in solid lifters. The 305 motor comes with hydraulic lifters which require no adjustment. You may want to turn the motor a little at a time until the valves are closed and then follow the manufacturer's suggested torque on the rocker arm bolt. The valve should be closed and the cam at its lowest position when you make this adjustment. If you find that your motor is skipping after you have done work, you may have tightened the lifter bolt too tight so back it off and follow the instructions.

Answer 3

The firing order on a small block Chevy (305) is 1-8-4-3-6-5-7-2.
Pull both valve covers off and bring the number one piston (drivers side front) to TDC (Top Dead Center) on a compression stroke (this is easier with the spark plugs removed but can be done with them in). Adjust both rocker arms, for that cylinder, until you have zero lash (no distance) between the rocker arm and the pushrod (you can do this by loosing the nut until the pushrod is free, then tighten the nut while moving the pushrod up and down, with your fingers, until the pushrod no longer moves up and down). After that, tighten the nut an additional half turn.
Then spin the motor (crankshaft), clockwise (when viewed from the front of the vehicle) 90 degrees and move to the next cylinder in the firing order (in this case number 8, the passenger side back cylinder). Repeat the procedure listed above for both rocker arms (when you adjust the rocker arm nut you are actually adjusting the valve). Then spin the motor 90 degrees again and continue the procedure on the next cylinder in order of the firing order (in this case cylinder number 4)

if a rocker begins to make noise again then you either have a bad lifter or a camshaft that is dying a slow, painful death.

Answer 4

lol look at these answers, heres mine, warm engine to opperating temp. remove the valve covers, only one side at a time, start the motor, take your 5/8th's socket and loosin one rocker nut until you hear lifter noise, then tighten it until the noise is gone, then make another 1/2 turn and then that valve is done, now 15 more to go. this is the tried and true way i have used for 20 years. if the noise on one valve doesnt go away then loosen it up for a few and then retry. ok if its a fresh rebuild thats a whole nother story and just as easy but you have to have a manual to tell what cylinders to adjust at what position. the easiest way is to rotate the push rod until it just starts to grab as you continue to rotate it. you will develope a feel for it and 9 times out of ten you wont have to readjust, hope this helps

Answer 5

try www.askautopro.com