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225V6 O.F. rocker arm assembly

Discussion in 'Early CJ5 and CJ6 Tech' started by Walt Couch, Feb 9, 2014.

  1. Feb 9, 2014
    Walt Couch

    Walt Couch sidehill Cordele, Ga. 2024 Sponsor 2023 Sponsor 2022 Sponsor

    cordele, Ga.
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    Rocker arm assembly is very cruddy so I want to take it apart and give it a good cleaning. The rocker arms move on the shaft but I can't get the three shaft supports to move. Sure don't want to bend or break anything but I need to do this because I think all of the oil passages in the rocker arms are restricted or plugged. Any suggestions out there. Tnx Walt
     
  2. Feb 9, 2014
    1960willyscj5

    1960willyscj5 Well-Known Member

    Mesa, Arizona
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    I don't have the V-6, so this might not make sense: Do the supports have caps over the rocker arm shafts? If so then maybe you could remove the caps after marking them for location and direction so you can get to the passages in them. I agree on not wanting to break things like that, not knowing if there are replacements available. However having to oil going to the various parts of the valve train is very important too.
     
  3. Feb 9, 2014
    Walt Couch

    Walt Couch sidehill Cordele, Ga. 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    There are three supports with each having a bolt through the support and a hole in the shaft. Only the front support receives oil from the engine to oil all of the rockers and their pivot points. The rockers have a hole through them leading to the pushrod insert for oiling the rod and lifter. I think that some shade-tree mech got on these three bolts and tightened them super tight and deformed the supports around the shaft. The shaft does not rotate and is not supposed to. The rockers move pretty freely.
     
  4. Feb 9, 2014
    1960willyscj5

    1960willyscj5 Well-Known Member

    Mesa, Arizona
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    Yeah I went searching and found pictures of what you are talking about. The bolt through the support also goes through a hole in the shaft. No way that shaft is going to move.

    So the oil pressure pushes the oil either up through the bolt or (more likely I think) pushes the oil up between the bolt and the inside of the hole then through the rocker shaft to the rocker arms and to the tops of the valves to oil them. And you are saying that you think yours have been squashed closed so no oil flow.

    Looks like you will have to pull the bolts in order to get to the oil passages to clean them.
     
  5. Feb 9, 2014
    Walt Couch

    Walt Couch sidehill Cordele, Ga. 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    What I am saying is that I need to remove all the rockers and clean them and the inside of the rocker tube. I am leaving the center support on as I can get everything cleaned with it in place. Yep the mounting bolt has a smaller shank than the thread area where the oil travels up around the bolt to the shaft. These 225's don't have upper oiling like a chevy.
     
  6. Feb 9, 2014
    oldtime

    oldtime oldtime

    St. Charles,...
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    You will need to remove each RH or LH rocker shaft as a complete assembly.
    Remove all 3 tower bolts and remove as an assembly.
    Keep all rockers and the shafts in their original order.
    That way you can inspect whats going on in case you find a bad rocker or shaft.
    The towers will fit very snug onto the shafts.
    You will likely need to press or drive the shaft from each of the shaft towers.
     
  7. Feb 9, 2014
    Walt Couch

    Walt Couch sidehill Cordele, Ga. 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    Yep your right Ken. I know the towers are a close fit to keep from loosing oil between them and the shaft. The rocker assemblies are being cleaned one at a time and all parts will go back in the same order as removed. I was able to compress the sides of the towers with a C clamp and was able to rotate the towers on the shaft so I am now able to get them apart. I still believe they were over tightened which distorted and clamped the towers to the shaft. I will check the tubes for straight and round before re-assy. Think I have it going my way now. Tnx to all.

    Walt
     
  8. Feb 9, 2014
    1960willyscj5

    1960willyscj5 Well-Known Member

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    Thumbs Up!
     
  9. Feb 10, 2014
    oldtime

    oldtime oldtime

    St. Charles,...
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    Yeah, With a strong grip and a twisting action I was able to remove 3 out of 4 of the end towers.
    But at least one final remaining tower will have to be coaxed off with either hammer taps or a press.
     
  10. Feb 10, 2014
    Walt Couch

    Walt Couch sidehill Cordele, Ga. 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    I soaked the assy's in carb cleaner over night so am just now beginning to take it apart and mark position of everything. Will see how it goes.
     
  11. Feb 10, 2014
    Walt Couch

    Walt Couch sidehill Cordele, Ga. 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    After removing the two end towers easily, I found that driving the center tower off was easy using a piece of 1 inch EMT electrical pipe which was a perfect fit over the shaft. Now for good cleaning and inspecting, I will be ready for assembly.
     
  12. Feb 10, 2014
    piffey263

    piffey263 Active Member

    Medford, OR
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    hey Walt, this has caught my interest.

    my rockers and such are extremely dirty also. Although I do see you are doing this for another reason too. Are you doing this with the head still on the block?

    I have thought about cleaning them a few times all though I did see oil getting to rockers very slowly that is but assumed it was a buick thing.


    Sent from my iPhone using Tapatalk
     
  13. Feb 10, 2014
    Walt Couch

    Walt Couch sidehill Cordele, Ga. 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    Yep heads still on. Be sure to clean the oiling hole that goes down through the head where the front tower bolts on and down through into the block.
     
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