![]() The factory oil delivery location allowed the oil to "hemorrhage" out at the top half of the bearing and was prone to starving the bearing at the bottom half, especially with higher spring pressures. This causes extreme loads at the lower half of the bearing, and in relation considerably less at the top. When the camshaft rotates a "hydraulic wedge" is produced, this wedge is created as a result of the cam being driven downward by the valve train. ![]() The wider foot print disburses valve train loads over a greater area and the dual grooves allow oil to be directed around the circumference of the bearing, again, without compromising strength or load carrying ability. The dual groove - dual feed bearings include the same material specifications as out hardened bearing series with the addition of the dual groove and dual feed technologies on a wider foot print. ![]() TA's exclusive Dual Groove - Dual Feed Technology bearings are the result of years of evaluation and testing. The hardened bearings also incorporate a larger footprint to distribute the additional loads created by higher pressure valve springs. TA's hardened bearing series incorporates a steel backed alloy material. TA Performance offers Hi-Performance cam bearings for most Buick applications.
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