Posted January 20, 20169 yr I noticed my lift pump is leaking around the primer boot and was wondering if this can be repaired? The boot isnt torn and the pump itself is only about 4 years old. Am I correct to assume that this leak is letting air in the system?
January 23, 20169 yr Some of the older designs had a O-ring you could replace, but I don't think yours will. If yours looks like this, replacement is your best option. If you don't mind it being yellow. http://www.ebay.com/itm/NEW-TAKE-OFF-FUEL-LIFT-PUMP-4BT-390-CUMMINS-PART-3936316-/301747944699?hash=item4641943cfb:g:ZwkAAOxydlFS5M5- And yes, it has the possibility of leaking air in as well. Edited January 23, 20169 yr by Cowboy
January 23, 20169 yr Author On 1/21/2016 at 9:23 AM, Mopar1973Man said: Just replace the lift pump. It's most likely wore out. It was replaced 3 years ago. I was I another town visiting a friend when the old one took a dump, Autozone was the only place that had one in stock. Obviously it wasn't a quality unit. 13 hours ago, Cowboy said: Some of the older designs had a O-ring you could replace, but I don't think yours will. If yours looks like this, replacement is your best option. If you don't mind it being yellow. http://www.ebay.com/itm/NEW-TAKE-OFF-FUEL-LIFT-PUMP-4BT-390-CUMMINS-PART-3936316-/301747944699?hash=item4641943cfb:g:ZwkAAOxydlFS5M5- And yes, it has the possibility of leaking air in as well. Mine looks like the one you posted. For $62.80 shipped it could be hot pink with zebra stripes for all I care lol.
I noticed my lift pump is leaking around the primer boot and was wondering if this can be repaired? The boot isnt torn and the pump itself is only about 4 years old. Am I correct to assume that this leak is letting air in the system?