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Old 03-24-2023, 06:36 PM   #1
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CAPS system fuel leak

It appears we have a leak out of #2. Does anyone know if these have o-rings or what the fix is ? 370 ISL Cummins. Thanks in advance.
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Old 03-24-2023, 06:46 PM   #2
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I'd recommend creating an account on the Cummins Quickserve. Once you create an account you register your engine using the SN. You will then have access to parts pages showing the fuel pump with details on what parts are part of it.

I use it all the time. If I think the I might need a parts page for future reference I print it to PDF and save it to my files.
Jim J
2002 Monaco Windsor 38 PKD Cummins ISC 350 8.3L
2005 Jeep Grand Cherokee w/5.7 Hemi
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Old 03-25-2023, 12:33 AM   #3
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A digital caliper helps to take the measurements for O rings . Compare to charts like on McMaster Carr. Most auto parts will have have O-ring drawer as well as hardware stores. You have to watch hardware stores, they can have EPDM O rings for plumbing.... you'll want Viton for fuel .
95 Monaco Crown Royale
M11 400hp, 4060 trans.
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fuel, leak

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