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Old 10-16-2019, 07:54 PM   #23
cadillac512
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Join Date: Apr 2019
Location: Kansas
Posts: 39
Default Re: 8BA compression issues

If it were me at this point I would place #1 piston at TDC and slowly rotate the crank pulley 2"-3" left and right watching the valves on that cyl. If they don't move,rotate the crank a full turn and check again. (at this point #1 is on the overlap stroke and turning the crank slightly one direction opens one valve and slightly the other direction opens the other one). As the piston passes over TDC one valve will close while the other opens. If this occurs right at TDC or VERY close, the cam timing is correct and the problem lies elsewhere. If it's very far off, you'll have to pull the front cover to correct the cam timing by lining up the gears correctly.
There have been cases where gears were incorrectly marked....


Terry
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