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Old 09-23-2011, 06:11 PM
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Valve adjustment/ Hydraulic lifter?

Hi, Guys.

I got my lifters and pushrods in the engine today. I followed instructions, but I heard from reading a thread on the forum search that I shouldn't compress the lifters as tight as I did. Which way is correct?

I tightened them until I could no longer spin the pushrod by hand and then gave it one more turn. The lifters were about a quarter inch depressed at that point; Is that too tight?

I also soaked them in 75W gear oil for several hours since it sticks instead of dripping off.

Thanks.

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Old 09-23-2011, 06:14 PM
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If you had them pumped up 1/4 turn after you get them set JMO it has just about alway's worked for me anyway. should be no more then 1/4 to 1/2 turn after they are set. IMHO



Cole
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Old 09-23-2011, 06:27 PM
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Your new lifters had no oil in them and are are now bottomed out for adjustment. If you can see the plunger. It should be 1/16" or less below the snap ring.

Loosen everything up...
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Old 09-23-2011, 06:52 PM
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If you just turned the adjusting nut a 1/4 to 1/2 turn instead of a full turn, you would have been ok as long as you had the lifter on heal of the cam lobe
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Old 09-23-2011, 08:29 PM
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I was afraid of that. I'll loosen them up in reverse order and check the adjustment again after it's running.


Thanks.
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Old 09-23-2011, 09:31 PM
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Screwing the pooch on the valve adjustment may have been the luckiest screw-up you ever made.

If all you have on the lifters is 75w gear oil (where in hell do these "ideas" come from???), STOP RIGHT NOW. Remove them, wipe the thick goo off of them and out of the lifter bores, clean them on the outside w/carb cleaner, etc., and hope that you didn't actually pump any of that crap into the lifters themselves (prolly too thick, but you never know how hard some guy's will try to sabotage themselves).

All that goes on a lifter is two things: motor oil or thin assembly lube on the body and moly cam lube on the foot (and maybe a smudge on the ends of the pushrods). PERIOD. Thick crap like gear lube on the lifter sides (body) could prevent the instantaneous lifter rotation in the lifter bores which has to happen- or the cam will be ruined in a couple minutes, max.

The cam also needs to have moly break in lube on the lobes- not on the bearing journals, and no 75w gear lube on the lobes or journals either.
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Old 09-23-2011, 11:42 PM
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didnt see that part with the gear lube... yes as cobalt said, get that stuff off and out of your lifters the best way possible and use assembly lube for camshafts
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Old 09-24-2011, 01:12 PM
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Thanks, guys. I got the lash re-adjusted and the plungers all work perfectly and the lifters all slide up and down freely.
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Old 09-24-2011, 01:21 PM
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Using the "spin-the-pushrod" method of taking up slack will almost always result in over-tight valve adjustment. Make certain that the lifter is on the heel of the cam. Hold the rocker tightly down against the valve stem and jiggle the pushrod up and down while your buddy slowly tightens down the nut. When you can't move the pushrod up and down any longer, take an additional 1/2 turn on the nut.
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Old 09-24-2011, 01:25 PM
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Quote:
Originally Posted by techinspector1
Using the "spin-the-pushrod" method of taking up slack will almost always result in over-tight valve adjustment. Make certain that the lifter is on the heel of the cam. Hold the rocker tightly down against the valve stem and jiggle the pushrod up and down while your buddy slowly tightens down the nut. When you can't move the pushrod up and down any longer, take an additional 1/2 turn on the nut.
That's the method I used this time and the plungers barely compressed instead of bottoming out on me.
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Old 09-24-2011, 01:28 PM
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Quote:
Originally Posted by techinspector1
Using the "spin-the-pushrod" method of taking up slack will almost always result in over-tight valve adjustment.
Wonder who was the lug-nut that came up w/that description, anyway?
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