Retaining washer on the shaft should be far enough up to prevent the oil pump Is on or the engine is in the engine bay.Īfter installing a new oil pump and shaft, insert theĭistributor into the engine block making sure it seats all the way. This job becomes considerably more complex once the oil pan When building an engine or replacing a new oil pump and pump driveshaft, it’s essential to test fit the distributor, adjust the shaft retaining ring, and make any other modifications at this point. If this washer is left off during installation, the shaft can be pulled out during distributor removal, and may result in the shaft falling into the oil pan, misaligning with the pump drive, or causing it to fall off to the side and onto the pump housing. When the distributor is pulled from the engine, the washer contacts the engine block preventing it from disengaging the pump drive. Ford oil pump driveshafts feature a retaining washer located near the distributor end, which prevents the shaft from pulling out of the oil pump during distributor removal.It’s best to find a shaft that fits properly. In this situation, trimming off some the bottom of the distributor shaft may be required, but only as a last resort. Most of these hexed shafts are long enough to accommodate a late model EFI distributor, although some of the earlier aftermarket heavy-duty oil pump shafts may not have enough hexed length to accommodate the longer EFI shaft causing a bottoming-out situation with the oil pump shaft’s shoulder. Many aftermarket heavy-duty oil pump shafts are only hexed on the ends of the shaft with a larger diameter round section in the center.All other Ford oil pump driveshafts are considerably longer and use a 5/16-inch hex (except FE, those that is a ¼-inch hex), which are not interchangeable with a 302 base engine. Ford 8.2-inch deck Windsor engines (221-302 c.i.d.) use a ¼-inch hex oil pump drive shaft and have a length of 7.45 inches.There is no special-length oil pump drive shaft for EFI applications, be aware the longer distributor shaft may cause fitment issues with some aftermarket oil pump driveshafts. Additionally, the internal hex drive in the EFI distributor extends deeper into the shaft as well. 5.0L EFI distributors (and 5.8L EFI) have a longer shaft, extending approximately 0.575″ below the drive gear than the earlier Duraspark or points-type distributors. Here are things to consider that might help to resolve Is it possible I got the wrong one?ĭistributor fitment problems stem from improper installation or adjustment of To seat down all the way in the engine block. Rebuilding a 302 Ford EFI engine, I am having an issue getting my distributor (Image/OnAllCylinders – Katie Rockman & Patrick Miller) On the right side is a stock fully hexed shaft. On the left is a 302 ARP heavy duty oil pump shaft that features a larger diameter center section with 1/4-inch hex on the ends.
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