[Question] Valve lash?
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Valve lash?

  1. #1
    Senior Member Big Otis's Avatar
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    Default Valve lash?

    I purchased a boat last month, problem is the guy I bought it from had no, I mean no info on the motor. Not sure what to set the valve lash at. I'm thinking its a solid/Roller cam, but not sure.
    Any thoughts?

    What I do know: 671 blower 1to1. two Holley double pumpers. Crane gold rocker arms. "Hi perf" cast on the heads.
    Thanks in advance,

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    Senior Member EVILFORCE's Avatar
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    If you are sure it is a solid cam you should be safe setting them at .025. It can vary. From .020 to .030. Might even try .030 at first and see how it sounds. If noisy tighten them a bit more.
    No Fool Like A Old Fool is there?

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    Senior Member 67weiman's Avatar
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    My advice would be to open it and make damn sure it is solid!

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    Ain't Right Racin piston in the wind's Avatar
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    Look down at the lifter if it has a snap ring in the center it's hydraulic

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    gn7
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    Quote Originally Posted by piston in the wind View Post
    Look down at the lifter if it has a snap ring in the center it's hydraulic
    What are you saying, GM type solids don't have a snap ring? I don't think I have ever seen a GM or non FE Ford solid that didn't have a snap ring. Just about every FLAT solid that oils thru the pushrod has a snap ring. Rollers and some side edge orfice solids do not. But if it has a oil hole in the waist band and controls the oil flow thru a enertia piddle valve, it has a snap ring.

    Now it it has no snap ring, chances are its a solid roller. But then he would know that by the tie bars.


    Crower Cool Face solid lifter.




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    Last edited by gn7; 08-25-2012 at 09:25 PM.

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    Ain't Right Racin piston in the wind's Avatar
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    Quote Originally Posted by gn7 View Post
    What are you saying, GM type solids don't have a snap ring? I don't think I have ever seen a GM or non FE Ford solid that didn't have a snap ring. Just about every FLAT solid that oils thru the pushrod has a snap ring. Rollers and some side edge orfice solids do not. But if it has a oil hole in the waist band and controls the oil flow thru a enertia piddle valve, it has a snap ring.

    Now it it has no snap ring, chances are its a solid roller. But then he would know that by the tie bars.


    Crower Cool Face solid lifter.
    look at the first post again.

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    Senior Member bp298's Avatar
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    if you look down the hole at the lifters, can you see a tie bar???

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    gn7
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    Quote Originally Posted by Big Otis View Post
    I'm thinking its a solid/Roller cam, but not sure.


    ,
    Quote Originally Posted by piston in the wind View Post
    look at the first post again.


    I did. Not sure what to make of that. Never seen solid roller written like that. Thinks? its a roller? I'm thinking if he doesn't KNOW its a roller or not, he doesn't need to know the lash, he needs someone to set it for him.


    Not being able to tell a hyd from a solid strictly by looking is one thing. But a roller from a flat?

    But you are correct, if its a solid roller, there will be no snap rings.



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    Last edited by gn7; 08-26-2012 at 01:25 PM.

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    Senior Member Big Otis's Avatar
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    Again, Thanks for the help.

    Pulled the valve cover and grabed the flash light. I don't see any tie bar. there is a snap ring like the one in GN7's photo.

    Now i'm really not sure if it's solid or hydraulic. Sounds like .025 is a safe place to start, if it is solid.

    also without moving anything i can get a .020 feeler gauge in some of them now, that's why i was thinking it's a solid. But the last owner had the boat for 6 years and never pulled a valve cover. so if your not checking the valves for 6 years must be hydraulic?

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    gn7
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    Quote Originally Posted by Big Otis View Post
    Again, Thanks for the help.

    Pulled the valve cover and grabed the flash light. I don't see any tie bar. there is a snap ring like the one in GN7's photo.

    Now i'm really not sure if it's solid or hydraulic. Sounds like .025 is a safe place to start, if it is solid.

    also without moving anything i can get a .020 feeler gauge in some of them now, that's why i was thinking it's a solid. But the last owner had the boat for 6 years and never pulled a valve cover. so if your not checking the valves for 6 years must be hydraulic?
    You say SOME. Like MOST? Or 1 or 2? If you have SOME reasonable lash on all of them, its almost certain its a solid. Pretty hard to have a hyd cam have all the them loosen. Plus, if you have .020 on more than a couple, and it was a hyd, it would make a racket you could hear across the street.



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    Senior Member EVILFORCE's Avatar
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    If it has been sitting for that long you might want to check your valve springs as well.
    No Fool Like A Old Fool is there?

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    Senior Member Big Otis's Avatar
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    Quote Originally Posted by gn7 View Post
    You say SOME. Like MOST? Or 1 or 2? If you have SOME reasonable lash on all of them, its almost certain its a solid. Pretty hard to have a hyd cam have all the them loosen. Plus, if you have .020 on more than a couple, and it was a hyd, it would make a racket you could hear across the street.

    I'm going to check them all now. I did not hear any valve noise.

    I did a compression check the first day I got the boat, the cylinders were between 110 and 125 pounds one was at 95. I was thinking that cylinder had the squished Valvespring for a while.
    I'll bet there's a fancy check the valve springs while there installed tool?

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    gn7
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    Quote Originally Posted by Big Otis View Post
    I'm going to check them all now. I did not hear any valve noise.

    I did a compression check the first day I got the boat, the cylinders were between 110 and 125 pounds one was at 95. I was thinking that cylinder had the squished Valvespring for a while.
    I'll bet there's a fancy check the valve springs while there installed tool?
    Not the most accurate, but good enough to tell if they are all within reason of each other. They don't all drop at the same time.
    Its about the most inexpensive one out there.

    http://www.summitracing.com/parts/MOR-62390/



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    Default Does it run????

    Quote Originally Posted by Big Otis View Post
    Again, Thanks for the help.

    Pulled the valve cover and grabed the flash light. I don't see any tie bar. there is a snap ring like the one in GN7's photo.

    Now i'm really not sure if it's solid or hydraulic. Sounds like .025 is a safe place to start, if it is solid.

    also without moving anything i can get a .020 feeler gauge in some of them now, that's why i was thinking it's a solid. But the last owner had the boat for 6 years and never pulled a valve cover. so if your not checking the valves for 6 years must be hydraulic?
    Does it run?? Have you tried to fire it up?? Rather than starting to change things, try to start it. It might run just fine the way it is.....
    Ray
    LOUD BOATS SAVE LIVES

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