Fast Freddie
Well-known member
i went to replace the smog pump on my 1991 yesterday only to discover i was sent the wrong part. looks the same, until you look at a little better. the one on the car had 8mm bolts holding the pulley on and also in the back mounting bracket. the replacement had 6mm bolts to hold the pulley on, and for the rear mounting bracket. not that bad, but the real problem was the mounting pad for the metal tube that goes to the diverter valve ( correct item name? ). the pad it mounts to on the pump was twice as tall on the replacement pump as on the original. don't seem like much just lookin at it but it was enough to cause the tube to hit the water neck and prevent the pump mounting holes from lining up with the mounting brackets. my parts guy ordered another one. this time it came in with 8mm pulley mount holes, 6mm rear bracket mount holes and a tall air tube mount pad. 3 pumps, 3 different configurations. apparently the rebuilders just strip the pumps and reassmemble out the first part they grab out of the parts bin. parts guy has ordered 5 more to try to get me the right one. may have to take 2 and make one. just thought i would put this out there for anybody that may be looking at replacing thier pump.
