Bent wrenches not a must have. A friend uses short ones, he cut them off so as to have room to turn. See if the old gasket is pliable, if so, reuse. The cam lobes need to be "facing" away from the valve you are adjusting. Some folks use the PS, some folks use the crank, my vote goes to the latter. A helper makes this a much faster job.

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83 SD

84 CD