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  1. #1
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    Default Panhead lifters and pushrods

    Sooooo, got my heads and jugs back from Dragstews ( '48 heads on a '56 FLH motor), compression is outstanding, easy start, runs really nice ( still in early break-in ), no oil in the exhaust, plugs look good. We have a winner.

    One of the things Jesse found was a totaled rocker arm on the front exhaust valve, the motor would pound when hot and clearly ripped the crap out of the pushrod pocket on the rocker. He replaced it with new. When the bottom end was built by T-Bone one thing he did was to replace what was in there with a brand new set of S&S hydraulic lifters & pushrods.

    Ok, scene is set. After getting the heads in I noticed the exhaust lifter started hammering when the motor became completely warmed up. I added another turn to the adjustment on the front exhaust pushrod ( 5 turns instead of 4 ) seemed to be much better, but yesterday on a 10 mile ride it started to hammer again as I got close to home.

    Now the motor still has less then 50 miles on it so maybe it is just a need to go easier on the break in???? OR....

    I am going to stop on my morning ride and pick up a mechanics stethoscope to make sure it is in fact that front valve is the one making noise. My next step after that will be to swap the lifters into different holes to see if it is a failing lifter, I will also make sure the pushrods are not bent ( checked it when I put it back together ).

    My '55 had solid lifters in it and as a last resort I am willing to move to a set of those, but before I toss $400.00 worth of lifters in the trash I was wondering what my other options are. I have heard that chromoly pushrods are a better option, but I have not been able to find a set anywhere.

    I am running 60 wt HD oil, but I need to get a new oil gauge as this one has stopped working, but it has a rebuilt S&S oil pump on there as well.

    I am open to suggestions here, comments, pointers, etc...

  2. #2

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    The combination of an end oiling pinion shaft and hydraulic tappets in a pan or any pre-'73 motor usually comes to grief, even with a good (modern) oil pump. If that is the case with your motor, solid tappets are the quick fix. In my experience, conversion of these earlier motors to newer oil pumps and end oiling pinion is often botched, even by "experienced" mechanics because there are several pitfalls in the process. I have fixed several of these fuck-ups in the last few years. Lack of experience with the earlier oiling system is the problem. Noisy tappets is the symptom.

    Jim

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    Is your oil pressure gauge showing much oil pressure when hot .. ?

    If it's low, you can bump the oil pressure up a bit by installing a 83-up pressure relief spring, also can install 73-up speed up gears ....

    Tooth count on those are 6 on the drive gear and 24 on the driven ...

    Last edited by Dragstews; 2 Weeks Ago at 10:15 AM.

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    The gauge quit working and is stuck at ~7 psi. I am looking for a replacement as we speak.

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    On the pushrods, S&S has chromoly ....



    They sell only the rods, must reuse your adjusters or buy new from another source ..
    Last edited by Dragstews; 2 Weeks Ago at 12:09 PM.

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    Default S&S Oil Pump ....

    The 83-up spring works on the later cast iron pumps ...
    I'm guessing your S&S pump is their older cast aluminum instead of their billet .. ??

    Photo Please for I.D. ing ....

    Also the hyd. lifters can be taken apart for inspection and cleaning ...
    There is a tiny spring in em, don't lose it ...

    It might be a good idea to replace that front exhaust hyd. unit with a new one one due to the past beating it has seen ....
    (They are sold as each)
    Last edited by Dragstews; 2 Weeks Ago at 12:16 PM.

  7. #7
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    Here is a pic of the oil pump. I will try to run out for an oil gauge at some point this weekend, I can start there before I buy anything else.

    Click image for larger version. 

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    I was right about it being the cast S&S pump ...
    Good pump, but most likely it has the 72 and back drive/driven gears in it ..
    You would benefit greatly with upgrading to the 73-up gears. Increases the flow rate by 25% more than ya got now ...



    Well, will ya look at what I found in stock ... ^^
    ______________________________________________

    I spotted sumthin in your photo...

    Your running a Knuck cam cover that has the top-end oil port drilled ...
    That would be the best place to mount the pressure gauge, need a 45* fitting in order to tilt it to your eyes...

    (That way you would have eyeball to eyeball contact) ...
    Last edited by Dragstews; 2 Weeks Ago at 2:45 PM.

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    So by chance are you an S&S dealer?

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    Yup ....

    Whatca got in mind ??

    A set of 3-5/8" Big Bore Jugs ...
    Or 4-3/4" flywheels ...
    I got it, I know whatca got cookin ... A set of P-Series Heads ...

    Am I close .. ?? ...
    Last edited by Dragstews; 2 Weeks Ago at 8:24 PM.

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    !! AND !!



    Ya think .. ??

    Yo Tattoo, did you see the SHARK too .. ??
    Last edited by Dragstews; 2 Weeks Ago at 9:57 AM.

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    Quote Originally Posted by Dragstews View Post
    Yo Tattoo, did you see the SHARK too .. ??


    Sure did............

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    Quote Originally Posted by Dragstews View Post
    Yup ....

    Whatca got in mind ??

    A set of 3-5/8" Big Bore Jugs ...
    Or 4-3/4" flywheels ...
    I got it, I know whatca got cookin ... A set of P-Series Heads ...

    Am I close .. ?? ...
    Um, next build, ya that's the ticket, next build...

  14. #14
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    Quote Originally Posted by Tattooo View Post

    Sure did............



    A Man who's wrapped up with oneself is a small package ...
    Last edited by Dragstews; 2 Weeks Ago at 2:00 AM.

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