Repair your own idler / tensioner with our bearing for use on all 289, 302, or 390 engines. After 50 years of heat and use, many idler adjusting bearings have seized or are on their way out. This is your answer! This part requires a press to install it. Bearing surface is 1-7/16", bearing diameter is 1.180".
Shaft length (sticking out of bearing) 1 1/8"
Ford numbers C4AZ-2990-A, C4AA-2A898-A.