Dumb Valve Lash Question
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Instructor
Joined: May 2015
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From: Maple Valley WA
Dumb Valve Lash Question
I'm getting my rebuilt motor ready for install and went to check the valve lash, most of the rockers are loose which got me wondering. Do I need to get some oil in the lifters before setting the lash?
Team Owner
Joined: Oct 2004
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From: altered state
St. Jude Donor '05
No...just make sure the up/down slop is out of the pushrod then give the 3/4 turn preload.
They can bleed down and when checking to see if the pushrod spins sometimes push the plunger down unnoticed
They can bleed down and when checking to see if the pushrod spins sometimes push the plunger down unnoticed
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Instructor
Joined: May 2015
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From: Maple Valley WA
Burning Brakes
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The instructions given were for a hydraulic cam...
If you have solid lifters you have to set them using feeler gauges and make sure the lifter is on the base circle.
Le Mans Master
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Every time I see a thread on adjusting lifters I think how much better big and. Small block Mopars have it. Just bolt the shaft down. Why chevy, WHY? LOL
Last edited by 7t9l82; Sep 12, 2020 at 10:51 AM.
Dr. Detroit
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Le Mans Master
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1st Gear
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factory settings for hydraulic lifters require for engine to be at operating temp and running. loosen rocker until noisy then tighten until just quiet. this will set lifter to zero lash.
one turn tighter from zero lash to preload lifter.
some folks will modify an old set of valve covers by cutting open the top to gain access for adjustment. I have a set of clips that cover the oil hole in the rocker to deflect oil spray.
also I adjust preload from 1/4 to 1/2 turn, never have had any luck with a full turn.
one turn tighter from zero lash to preload lifter.
some folks will modify an old set of valve covers by cutting open the top to gain access for adjustment. I have a set of clips that cover the oil hole in the rocker to deflect oil spray.
also I adjust preload from 1/4 to 1/2 turn, never have had any luck with a full turn.
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factory settings for hydraulic lifters require for engine to be at operating temp and running. loosen rocker until noisy then tighten until just quiet. this will set lifter to zero lash.
one turn tighter from zero lash to preload lifter.
some folks will modify an old set of valve covers by cutting open the top to gain access for adjustment. I have a set of clips that cover the oil hole in the rocker to deflect oil spray.
also I adjust preload from 1/4 to 1/2 turn, never have had any luck with a full turn.
one turn tighter from zero lash to preload lifter.
some folks will modify an old set of valve covers by cutting open the top to gain access for adjustment. I have a set of clips that cover the oil hole in the rocker to deflect oil spray.
also I adjust preload from 1/4 to 1/2 turn, never have had any luck with a full turn.
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Lars
Last edited by lars; Sep 16, 2020 at 11:38 AM.
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Maybe so, but if you do it our way, you will only have to do it once (less chance of mistake)
Dr. Detroit
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Not only is setting while running not preferred....you can end up with lifters that are plunged all different depths.....
Solids have to be set cold....so what it the difference? One you use a feeler gauge and the other you set the plunger depth....how do you set exact plunger depth on 16 valves? With Poly-Locs....and I have covered the procedure a dozen times on this forum....I haven’t “wiggled” a pushrod in 20 years because you do not have to.....
Not ONE professional engine builder sets hydraulic lash running and neither should you.
Jebby
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Dr. Detroit
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Jebby
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Full roller setup solid roller lifters, rockers. When I picked up my motor it was never started. He told me he set it statically but after first start up he gave me the gap spec for the setting valve lash with motor hot, .016 intake, .018 exhaust. being my motor has been together so long it must be correct info. Once a year I go thru this process (correct gaped sold roller setup is clicky by nature)
Burning Brakes
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some 50 years back, had a 1200cc toyota 3kc with pushrods, shaft rockers & solids. Even w/ a crane hot regrind, milled head & mini-lites it was underwhelming.
Before that, it was a lotus cortina; fugly but a right snappy sleeper. Unbeknownst to me, suppose I may've been one of the earliest of "tuners" around those parts.
Before that, it was a lotus cortina; fugly but a right snappy sleeper. Unbeknownst to me, suppose I may've been one of the earliest of "tuners" around those parts.
