Valve train question
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Valve train question

  1. #1
    Senior Member ICDEDPPL's Avatar
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    Question Valve train question

    I popped the valve covers to find my valve train is not exactly what I`d like it to be.. pretty easy fix with some adjustable guideplates but my question is after about 30 hours this summer should I be concerned about any damage?

    Could the valve guide be damaged?


    This is the worst one:





    The rest are a bit better:






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    Senior Member ol guy's Avatar
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    My first question would be what guide plates are you using and what diameter pushrod? I am surprised the valve train was quiet or was it? Not to mention what cam and lifter combo are you using? Ever hear any popping out of the engine? M

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    BTC cardcarrying member sunkisst's Avatar
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    My only response is...30 hours this summer ? Wow, good for you !!!
    I'm sure someone with a realistic response will chime shortly, Jack.

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  6. #4
    Senior Member ICDEDPPL's Avatar
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    Quote Originally Posted by ol guy View Post
    My first question would be what guide plates are you using and what diameter pushrod? I am surprised the valve train was quiet or was it? Not to mention what cam and lifter combo are you using? Ever hear any popping out of the engine? M
    Bought the boat as is... guide plates are Comp cams, I`m not sure on the pushrod diameter, the valve train was quiet.
    651 cam with Morel lifters. I wasn`t able to get more than 5300rpm due over propped, maybe that was a good thing.

    Sunkist: both drives had to be rebuilt so I started my summer late.. usually its closer to 50 hrs. Are you saying thats a lot?

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    merritt 21rayson's Avatar
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    Is it my eyes or does it look like the second pic. The guide plate looks like it was welded together.

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    Senior Member mustangmark's Avatar
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    I wouldn't worry about the cam or lifters to much if it's a hyd. roller. Morel makes a great lifter and they take a lot of punishment! You're on the right track with the adjustable guide plates! I've had to use them on dart and world products heads. You're pushrod diameter is more than likely 3/8. It's an easy fix. I would inspect the tops of your valve stems, the rocker arm wheels and area next to the of the rocker body next to the wheels.

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    Senior Member wizbang's Avatar
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    We use to cut the guide plates in half, move the pushrod/rocker to the correct position, then tig weld the guide plates back together !

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    Senior Member MACHINEHEAD1's Avatar
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    Wiz, almost want to keep welding them, than dick around with the adjustables!

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    Senior Member wizbang's Avatar
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    Quote Originally Posted by MACHINEHEAD1 View Post
    Wiz, almost want to keep welding them, than dick around with the adjustables!
    Sorry, I don't really understand what you are saying ?

    Also, we had WAY better luck with the original GM plates too !

  12. #10
    gn7
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    Quote Originally Posted by wizbang View Post
    Sorry, I don't really understand what you are saying ?

    Also, we had WAY better luck with the original GM plates too !
    Most of the guide plates out there are pure junk. Manley's are some of the worst. The Comps are usually pretty decent, and fit Darts better than any non adjustable I tried. But then they were aluminum heads. Not sure if the Iron Eagles are that much different. I know they require a different shaft rocker setup than the Pro 1 and 320/360 Race Series heads.
    That's the worse alignment I have ever seen, regardless the guide plate used. Amazing what some people will let out of their shop. Between this and Holorinhal's thread,



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  13. #11
    Senior Member ICDEDPPL's Avatar
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    The rocker studs were also not the proper ones.. too short. <sigh>

  14. #12
    gn7
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    Quote Originally Posted by ICDEDPPL View Post
    The rocker studs were also not the proper ones.. too short. <sigh>
    That's partially caused by the large trunnion in those rockers. It can also be caused by push rods that are too long.
    Makes me think the heads may not be Dart assemblies.



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  15. #13
    steelcomp was here
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    Whoever assembled that engine wasn't much into paying attention to important details. There is enough lateral adjustment in the guide plates as they sit which would have gotten rid of most of that. It just takes a second to check.
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

  16. #14
    steelcomp was here
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    Quote Originally Posted by gn7 View Post
    That's partially caused by the large trunnion in those rockers. It can also be caused by push rods that are too long.
    Makes me think the heads may not be Dart assemblies.
    It can also be caused by using stock length studs with long valves and tall installed heights. That's usually the cause.
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

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