LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Adjusting Valves

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Old 03-07-2009, 09:32 AM
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Default Adjusting Valves

Well I just got done adjudting the valves on my car. I ran the car for a few minutes and then shut it off. I was looking at the rockers and noticed some were still loose. is it normal to still have a little play in them onece you adjust them?
Old 03-07-2009, 09:42 AM
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Once the engine shuts off, lifters will bleed down. Some faster than others. It is normal to have a bit of play yes. What is important is no excessive valvetrain noise is being heard when the engine is running.
Old 03-07-2009, 10:32 AM
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Yea, it seems pretty quite while the engine is running.
Old 03-07-2009, 10:40 AM
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yeah, rockers will always have a little wiggle to them if there is no valve spring pressure on them(ex: lifters on the base of the cam).
Old 03-07-2009, 12:35 PM
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Even solid lifters have a tiny tiny bit of play, so you're alright

How'd you adjust them? Piston @ TDC on the firing cyl (#1 is easiest to start), and adjust till you notice a small bit of resistance while you're twisting the pushrod with your fingers, then 1/4 turn past that point. Turn the engine 90* and move to the next cyl in the firing order (#8 assuming you started at #1), rinse, repeat. There's a bit faster method with having cyl #1 and #6 @ TDC and you can go through and tighten the intakes and exhausts on certain cyl, but I won't get into that heh.
Old 03-07-2009, 01:36 PM
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or just have it running loosen it till they click then tighten them when they stop clicking doa 1/4 turn
Old 03-07-2009, 05:07 PM
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There's a bit faster method with having cyl #1 and #6 @ TDC and you can go through and tighten the intakes and exhausts on certain cyl, but I won't get into that heh.
That's not a good idea really on anything but a stock cam. Ask me how I found out...

I use the intake valve open, exhaust close method. It's the safest and most accurate
Old 03-07-2009, 05:36 PM
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Originally Posted by fergymoto
That's not a good idea really on anything but a stock cam. Ask me how I found out...

I use the intake valve open, exhaust close method. It's the safest and most accurate
Hrm... used that method many a time w/ an 847 cam and worked well.
Here's a vid I made about EOIC. It's on a solid roller, but the idea for hyd. is there...
http://www.youtube.com/watch?v=VPOaAsuzhsE
Old 03-07-2009, 10:01 PM
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Originally Posted by Formula350
Even solid lifters have a tiny tiny bit of play, so you're alright

How'd you adjust them? Piston @ TDC on the firing cyl (#1 is easiest to start), and adjust till you notice a small bit of resistance while you're twisting the pushrod with your fingers, then 1/4 turn past that point. Turn the engine 90* and move to the next cyl in the firing order (#8 assuming you started at #1), rinse, repeat. There's a bit faster method with having cyl #1 and #6 @ TDC and you can go through and tighten the intakes and exhausts on certain cyl, but I won't get into that heh.

Yea i did it with the TDC #1 and 6 method.

But I thought it was 3/4 turn??
Old 03-07-2009, 10:22 PM
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3/4, 1/2 or even a full turn past zero lash will work just fine. Most adjust 1/2 turn.

Last edited by SS Junk; 03-07-2009 at 10:31 PM.
Old 03-07-2009, 11:05 PM
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Well the motor I just regasketed turned out just fine with 1/4 :\
Old 03-08-2009, 10:17 AM
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Alright sweet.
Old 03-08-2009, 11:51 AM
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I have always used the TDC #1 & #6 with my Hydraulic cam setups, seem to work well enough for 8 second passes.
Old 03-08-2009, 01:45 PM
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i use the while running method. hasnt let me down yet.



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