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Thread: yukon : head replacement

  1. #1

    Default yukon : head replacement

    head replacement
    Post by yukon on Oct 12, 2006, 10:10am

    any tips, tricks, things to look out for, or manual pages to help replace a head on the 230 6 cyl? I've never dealt with an overhead cam before. thanks

  2. #2
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    Default hiker :

    Re: head replacement
    Post by hiker on Oct 12, 2006, 2:09pm

    Yukon, Some quick thoughts. Before disassembly, set the engine to Top Dead Center on the compression stroke for a good reference point when reassembling the engine. After you take the valve cover off, look at the relationship of the cam timing gear mark (dimple?) and the cam lobe for #1 cylinder. You'll notice that there is only one lobe for each cylinder and #1 lobe is pointed straight down. You will leave the timing gear and chain together resting in the timing cover. Use tie wraps through the holes in the timing gear and wrap around the chain to keep it from jumping a tooth. It's been a while since doing this but I don't think the gear will slip down into the timing cover. Maybe others will confirm. Otherwise, support the gear or wedge something to keep the gear from dropping down. The head is heavy. . . get help. Don't just drag it off the side, because the pistons are slightly domed and may get damaged. Two of the head bolt holes in the head are a tighter "close tolerance" fit to aid in head alignment. One in front, and one in the back. All other bolt holes are a loose fit. pay attention to the front and rear head bolts, they may all be the same, if not keep them in order.
    good luck, Robert-CA

  3. #3
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    Default hiker :

    Re: head replacement
    Post by hiker on Oct 13, 2006, 12:48pm

    AB Linn sells the valve cover gasket, new production. You can also try Memphis Equipment.

  4. #4
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    Default brute4c :

    Re: head replacement
    Post by brute4c on Oct 13, 2006, 12:52pm

    VPW is worth checking too....

  5. #5
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    Default hiker :

    Re: head replacement
    Post by hiker on Oct 13, 2006, 1:03pm

    here's a head gasket from NAPA for a non shaved head/block: www.napaonline.com/masterpages/NOLMaster.aspx?PageId=470&LineCode=NGA&PartNumber=3844BS&Description=Cylinder+Head+Ga sket

    They also have the valve cover gasket but I can't get the link to work correctly from here.

    Copy and paste the address, or go to NAPAonline.com and look up "head gasket" without the quotes '63 kaiser jeep, engine gaskets & seals, 6-230

    Robert-ca

  6. #6
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    Default brute4c :

    Re: head replacement
    Post by brute4c on Oct 13, 2006, 1:24pm

    The civvy head gasket doesnt fit the mil head...unless one wants to silicone the front corners of the head and block....the mil head has triangles that protrude from both sides at the front, timing cover, end. The mil gasket has the "wings" for this area where the civvy one doesnt...the civvy head wont even cover the entire opening on the back of the timing cover that the mil head does...


    The valve cover gasket is fine...

  7. #7
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    Default hiker :

    Re: head replacement
    Post by hiker on Oct 13, 2006, 1:47pm

    The NAPA picture shows the "wings" on the front of the gasket. Jon, you are correct as usual, years ago I did use a civilian head gasket with fillers up front just as you have said. I'm interested in what really is available.

  8. #8
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    Default brute4c :

    Re: head replacement
    Post by brute4c on Oct 13, 2006, 2:06pm

    Interesting they have the wings....have to order one and see...a definite maybe on that one...

  9. #9
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    Default hiker :

    Re: head replacement
    Post by hiker on Oct 13, 2006, 2:16pm

    Edited post above with picture.

  10. #10

    Default yukon :

    Re: head replacement
    Post by yukon on Oct 13, 2006, 3:47pm

    thanks for the help. i've ordered the head gasket and valve cover gasket from napa. i'll let you know how they work out and if they indeed look like the picture.

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