05-21-2004, 03:03 PM | #1 |
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nedd help with valves
I posted this over at the engine board as well
I know this has been discussed here before but my search came up with nothing. Can anyone lend a helping hand as to how to set the valves on my heads? With any luck I will be starting this engine over the weekend, so I could use some help
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05-21-2004, 03:59 PM | #2 |
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Tim, have you already installed your intake? Seems like the last picture I saw, it was. If not, twirl the push rod while tightening the adjuster until snug, then another half turn. If you can't spin your push rods, just bring up snug plus a quarter turn. Either way, you'll probably want to reset them with the engine running (can be messy). If you have access to a diagnostics machine after you get it running, you'll find out how close you are. I always tend to overtighten mine and have to relax them during final tuning. Good luck, pretty exciting, huh?
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05-21-2004, 04:29 PM | #3 |
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yeah, it is exciting!!! My intake is bolted back on but not torqued yet. I removed it to my pushrods a while back and then started focussing on the paint . It's gonna be nice to have this thing running because I'm getting really sick of pushing it in and out of the shop
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05-21-2004, 04:40 PM | #4 |
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dont twirl the pushrods move them up and down even if you cant spin them that doesnt mean they are too tight. the best most accurate valve adjustment is to set the motor at tdc then turn it by hand when the lifter on the intake side starts to move up adjust the exhaust. when the lifter on the exhaust starts to open adjust the intake. just move the pushrod up and down and when it wont move up and down anymore go another 1/4 to 1/2 turn and your done
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05-21-2004, 04:51 PM | #5 |
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adjusting valves
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05-21-2004, 05:34 PM | #6 |
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The best and easiest way I have found to adjust valves is first put a jumper wire to the starter that will crank the motor, Next is to pick a side, make sure all pushrods are in the motor and all slack is taken up to the point that you just start to feel resistance on pushrod turning it. On the side you are on start at front or back doesn't matter, Bump the starter button till you feel the first one go down and start seeing it's partner start to go up, This lifter is now at it's lowest point, adjust the nut till the pushrod starts to have resistance and then turn one half turn and move on to the next valve.
Doing it this way I have never had to go back and readjust valves and I dont to have to jump all over the block figuring which one I am supposed to do next.
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05-21-2004, 11:03 PM | #7 |
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how would you go about adjusting them with the intake on and the engine able to run? i have mine set so the truck runs 1/2 way decent but i think a little valve adjustment might help out. I have the clips to go over the pushrod so i dont get shot with oil, but then how do i go about adjusting them?
SORRY TO HIJACK THE THREAD! but i was wondering the same thing and was about to atempt to do it tomarrow, by the way one guy told me to... just looking for backup help. Again i am sorry to hijack the thread, but i would like to know also Rat
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05-21-2004, 11:43 PM | #8 |
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Here is the correct way the set your valves. By hand set the engine to fire #1 cyl ( TDC ). Loosen the rocker nut till the push rod can be spun then tighten the rocker nut just to the point that the push rod has drag as is it spun. Do this for #1 I-E #3-E #5-I #7-I #2-I #4-E #8-E Then set the engine to fire #6 cyl ( TDC ) and set #3-I #5-E #7-E #2-E #4-I #6 I-E #8-I
Then all rocker nuts get 1 turn down. Good Luck |
05-22-2004, 12:45 AM | #9 |
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I run solids in the 427, I have always used the intake opening/exhaust closing method and have never had a problem.
IO/EC=when the intake lobe is lifing the intake valve, adjust the exhaust valve. When the exhaust valve is closing, adjust the intake valve. Just take up all of the 'slack' in the lifter, (SLIGHT resistance on the twising method on the pushrod) and go another 1/2 turn for a proper adjustment on a hyd lifter. Works every time.
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05-22-2004, 09:06 PM | #10 |
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With hydraulics, soak lifters in oil first and adjust once. I've seen many guys keep adjusting them down. All they are doing is squeezing the oil out and overtightening them.
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05-23-2004, 09:17 AM | #11 | |
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Quote:
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