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Fix This

  1. #1
    LP-25.com Infomaniac's Avatar
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    Default Fix This

    Maybe a custom articulating rocker?
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  3. #2
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    Adjustable guide plates ?

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    LP-25.com Infomaniac's Avatar
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    Quote Originally Posted by VD Cruiser View Post
    Adjustable guide plates ?
    Yea it didn't look like it could be corrected with guide plate at first. I took the guide plate off completely and sure enough there is still clearance in the hole when lined up.
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    How many of them were off like that? Was that a different head than you normally use?

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    LP-25.com Infomaniac's Avatar
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    Only that one. The second set of these I have p[ut on engines. The guide plates are pretty much junk
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    a.k.a. "Mean Pair" Nice Pair's Avatar
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    Quote Originally Posted by Infomaniac View Post
    Maybe a custom articulating rocker?
    Looks like a twisted guide plate, possible bad stamping, or it could have twisted when torqued.
    As you suggested junk guide plates.



  9. #7
    Senior Member wizbang's Avatar
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    I've cut them in half, rotated to correct angle, then weld them back together ???????????

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    Quote Originally Posted by Infomaniac View Post
    Maybe a custom articulating rocker?
    I would look at the rocker stud. the valve guide to valve stem seem to look in line but the stud and boss look to be a tad off!! I would check the alignment on both heads and maybe you just have one head at one valve that is a pinch off. MLAO. M

  11. #9
    Senior Member ol guy's Avatar
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    Quote Originally Posted by ol guy View Post
    I would look at the rocker stud. the valve guide to valve stem seem to look in line but the stud and boss look to be a tad off!! I would check the alignment on both heads and maybe you just have one head at one valve that is a pinch off. MLAO. M
    After contemplating this if you corrected the alignment with guide plates how would the clearance be in the head for the pushrod? The heads look new and it could be a core shift or mill shift. I would (again) check the other head with calipers, gauges or even a tape measure. That alignment is so far off I would not try to put anything in to fix a bad head. Straight edge across all cylinders will tell the story. Valve tip to rocker stud to CENTERED push rod will tell the story!!! Good luck and let us know the outcome. M

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    Default CNC programing error??

    That almost has to be an error in the CNC programing.... How could that get past even a rudimentary inspection??? I have a set of AFR heads that I had to play "musical guideplates" with, and even with that, had to resort to some stock plates with elongated mounting holes to move stuff to a usable position... As a CNC machinist, shit like that really pisses me off, it is so easy to make it right. I'll bet they ran an entire work shift with that problem on all the heads...
    Once again, HOW can most be right on, and that one off that far?? It has to be a "position" error in the program...

    Ray
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  13. #11
    steelcomp was here
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    Very unlikely in a CNC operation that one hole is going to be that far off. They're cheezy guide plates. That one twisted. The machining is spot on with these heads. I've had several sets in the shop and have a set on a 532 BB Chev right now. They're a really nice cylinder head, especially for the money.
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    Village Idiot fc-Pilot's Avatar
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    Quote Originally Posted by wizbang View Post
    I've cut them in half, rotated to correct angle, then weld them back together ???????????
    I have done the same a few different times. When I was in a pinch time wise or cash wise and cutting/welding them was much faster and easier than buying and waiting to ship the adjustable ones.

    Paul

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    Quote Originally Posted by scott foxwell View Post
    Very unlikely in a CNC operation that one hole is going to be that far off. They're cheezy guide plates. That one twisted. The machining is spot on with these heads. I've had several sets in the shop and have a set on a 532 BB Chev right now. They're a really nice cylinder head, especially for the money.
    What heads are these?

    Paul

  16. #14
    Or Seth, either one Budweiser's Avatar
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    Here ya go. Fixed it for ya.
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