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Thread: how do I adjust valve clearance ?

  1. #1

    how do I adjust valve clearance ?

    Hi all,

    I read somewhere on the web about adjusting valve clearances on Buick straight eights and the procedure described was to run the engine till it gets to operating temp. and then check and adjust clearances while the engine was running.

    I tried this today and found that it is not that easy to do as it is hard to hold the spanner and screw driver in a constantly moving rocker.

    Does any one know how to set the clearances with the engine not running ?
    On 4 cylinder engines, you can set valve 1 with valve 8 fully open, set valve 2 with valve 7 fully open and so on... does anyone know of a procedure like this for the Buick straight eight ?

    Can someone who has the shop manual please advice how it is described in that ?

    Thanks heaps !!

  2. #2
    I ALWAYS use what's called the "Over Lap" method. I don't have the straight 8 firing order in front of me. I will use am example I know which is the "NailHead". The firing order on the "Nail" is 1-2-7-8-4-5-6-3. Put the first 4 cyls. on top & the last 4 under the 1st. 1-2-7-8
    4-5-6-3 When #4 cyl. is on overlap, meaning the exhaust valve is closing & the intake valve is starting to open. When they are open evenly #1 cyl. is ready to adjust & the timing mark should be pretty close to being at 0. And down the line, every 90*,
    2-5/7-6/8-3 understand????? And to adjust the last 4 you would reverse the numbers. 4,#1 would be on overlap & again the timing mark will line up to 0 or very close.

    Tom T.
    Tom Telesco
    Classic and Muscle Automotive
    12 Cook St.
    Norwalk, CT 06853-1601
    Day Phone 203-324-6045 ET
    NailHead Mini-Starters '53-'66
    Adjustable Roller Tip Rocker Arms - All NailHeads
    Custom forged pistons
    Front & rear neoprene seals
    Many other "Nail" parts
    "If I can't get it, you don't need it!"

  3. #3
    http://www.teambuick.com/forums/view...ter_adjustment

    You can also check the '52 shop manual in the reference section.


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