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rocker/valve alighnment

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Old Jan 16, 2011 | 02:16 PM
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TPI-Formula350-'s Avatar
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From: Long Island New York
Car: 89 Formula 350
Engine: Forged 385 H/C/I
Transmission: 700R4-4300 Stall-lockup
Axle/Gears: BW 9 Bolt 3:70
rocker/valve alighnment



I'm using Comp non self alighning rockers with guide plates. I see almost all my rockers sit 100% centered on the valve tip. I have like 2 rockers the sit slightly off center as far as alighnment. They are centered as far as pushrod length goes. Is this a problem or a non issue???? thanks
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Old Jan 16, 2011 | 04:15 PM
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TPI-Formula350-'s Avatar
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From: Long Island New York
Car: 89 Formula 350
Engine: Forged 385 H/C/I
Transmission: 700R4-4300 Stall-lockup
Axle/Gears: BW 9 Bolt 3:70
Re: rocker/valve alighnment

anyone?
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Old Jan 16, 2011 | 04:27 PM
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305sbc's Avatar
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From: Fairview Heights Illinois
Car: 1986 Irocz
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3.25:1
Re: rocker/valve alighnment

That's not enough to cause a problem.
I'm a bit of a perfectionist though and I usually make adjustment to the guideplate mounting to get things perfect.

Sometimes there is just some error stacking between the guide install and the drill/tapping for the rocker studs. You can usually find a happy medium by slightly moving the guideplate and re-torquing the studs.
Sometimes a split guide-plate is necessary.
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Old Jan 16, 2011 | 04:39 PM
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TPI-Formula350-'s Avatar
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From: Long Island New York
Car: 89 Formula 350
Engine: Forged 385 H/C/I
Transmission: 700R4-4300 Stall-lockup
Axle/Gears: BW 9 Bolt 3:70
Re: rocker/valve alighnment

Originally Posted by 305sbc
That's not enough to cause a problem.
I'm a bit of a perfectionist though and I usually make adjustment to the guideplate mounting to get things perfect.

Sometimes there is just some error stacking between the guide install and the drill/tapping for the rocker studs. You can usually find a happy medium by slightly moving the guideplate and re-torquing the studs.
Sometimes a split guide-plate is necessary.
yeah, I had replaced a that rocker stud so I must have shifted the guide plate. I guess I have to adjust it again to line it up better. I used red loctite so I guess i'll have to put a little heat on the stud to loosen it.
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Old Jan 16, 2011 | 08:44 PM
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From: Moorestown, NJ
Car: 88 Camaro SC
Engine: SFI'd 350
Transmission: TKO 500
Axle/Gears: 9-bolt w/ 3.23's
Re: rocker/valve alighnment

If its two rockers side by side like that, then just shift the guide plate over. If need be, you can enlarge or elongate the holes a little to help slide the rockers over. If its just one, then you'll either have to split the difference, or get an adjustable guide plate for those that are off. I dont know if Id leave it like that since itll put more stress on teh valve steam face.

If you use a hydrolic cam, then the locktite probably isnt necessary. None of my GM V6s that Ive owned that used screw in studs call for locktite. Just about 25 ft-lbs of torque. I tightened mine on my alum. heads to 30 ft-lbs, and have had no issues. One thing I hate about the red stuff is that it makes things a PITA to get back apart. I like the blue better for things that I might need to disassemble down the road.
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Old Jan 16, 2011 | 10:10 PM
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From: Long Island New York
Car: 89 Formula 350
Engine: Forged 385 H/C/I
Transmission: 700R4-4300 Stall-lockup
Axle/Gears: BW 9 Bolt 3:70
Re: rocker/valve alighnment

I'm going to try to adjust the guide plate to see if it helps. I had just loosened the guide plate/rocker studs recently. I called Brodix and they told me they use 1 drop of red loctite and torque to 40 ft. lb. After I adjust the guide i'm going to just go back to blue loctite.
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