Adaptors Can Affect Your Readings
Yes and no. Whether you use a standard or deep socket isn’t an issue. Neither are adaptors to fit, for example, a 3⁄8-inch drive socket on ¼-inch drive ratchet or even short extensions. But anything that moves the head, or pivoting point, of the torque wrench away from directly vertical to the fastener being torqued can affect your reading.
This includes wobble extensions, or crow’s feet. Crow’s feet extensions are necessary on some Chevy SB2 heads and other race-only cylinder heads that put a priority on port location and performance over ease of installation. If you find yourself in a situation where you must use some type of horizontal extension on your torque wrench, consult the manufacturer to see if it offers any means of compensating for the change in leverage.
Torque Wrench Myths - Circle Track Magazine
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