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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? 

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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.

Fuel_System_034.jpg

 

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 by Cowboy
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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.

Fuel_System_034.jpg

 

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. 

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