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Lift pump leak

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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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  • Cowboy
    Cowboy

    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. &

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If fuel is getting out, that means air is getting in.

  • Author

Is it possible to repair the leaking primer pump? 

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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    • 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.

    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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    Welcome To Mopar1973Man.Com LLC

    We are privately owned, with access to a professional Diesel Mechanic, who can provide additional support for Dodge Ram Cummins Diesel vehicles. Many detailed information is FREE and available to read. However, in order to interact directly with our Diesel Mechanic, Michael, by phone, via zoom, or as the web-based option, Subscription Plans are offered that will enable these and other features.  Go to the Subscription Page and Select a desired plan. At any time you wish to cancel the Subscription, click Subscription Page, select the 'Cancel' button, and it will be canceled. For your convenience, all subscriptions are on auto-renewal.