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Paccar · Cooling System
RFN5348001
In stock · ships from Knoxville
This is a pressure cap for the engine coolant surge tank (radiator fill cap) on heavy-duty trucks.
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Verified fitment for 2 applications
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All confirmed applications for this part number.
Also fits coolant surge tanks that use Paccar tank S-23610 (part number N5346001).
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 7 of 7.
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It seals the cooling system and maintains 15 PSI of pressure, which raises the coolant’s boiling point to prevent overheating and coolant loss. You replace this cap when it no longer holds pressure, causing leaks, coolant loss, or engine overheating. The cap is a direct-fit replacement for a range of Kenworth and Peterbilt models from 2008–2010, and it matches the Paccar N5348001 OEM part.
Part Number: RFN5348001
RADIATOR CAP FILL
Vendor: MHC Kenworth
Dealer: Knox Trailers
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