What This Hose Is and Where It Lives
This is the upper radiator hose that runs from the top of the radiator tank down to the engine thermostat housing on Kenworth and Peterbilt trucks running the HE9324 configuration. 2.5" inside diameter, molded rubber, built to handle the heat cycling and vibration these trucks put on cooling system parts day in and day out.
It's not a straight piece of garden hose - it's got bends and a shape molded into it to clear the fan shroud and engine mounts, so a generic straight hose cut to length isn't going to route right. That's why trucks like these use a molded part number instead of just buying hose off a reel.
Why All These Numbers Cross to the Same Hose
F04-6006, HE9324, 561.7525, 3813503, 7884-250FX - these are all the same physical hose sold under different labels. Gates, Dayco, Cummins, Flexfab, and Torque Parts all make or private-label this same molded shape because the OEM spec calls for it. Same ID, same bend angles, same overall length.
Where guys get burned is assuming every 2.5" upper hose on a Kenworth or Pete is this one. Depending on engine (Cummins vs. PACCAR vs. Cat) and cab configuration, there can be more than one upper hose shape running similar diameter. Before you order, pull the old hose and check for a molded-in number, or run your chassis VIN. That's the only way to be sure you're not ordering a hose that's close but doesn't clear right.
Ordering From PartStop
We keep this one in stock in Tacoma for will-call or same-day pickup if you're local, and we ship it out the same day for the rest of the fleet guys running these trucks up and down the coast or wherever your rig's parked.
It's aftermarket, backed by our 6+ month warranty, priced at $29.00 - a lot cheaper than a tow call from a blown hose on the shoulder. If the fit's off for any reason, we'll sort it, but do yourself a favor and confirm the number off your old hose or your VIN before it ships.
F04-6006 Cross-Reference & Interchange Numbers
These manufacturer and aftermarket numbers commonly cross-reference to F04-6006. Use them to identify the part — then confirm the exact fit by VIN or the number stamped on your old unit before you order. An interchange is a starting point, not a fitment guarantee.
| Brand / Line | Cross-Reference Numbers |
|---|---|
| Gates | HE9324 |
| Dayco | 561.7525 |
| Cummins | 3813503 |
| Flexfab | 7884-250FX |
| Torque Parts | PTRF046006 |
Frequently asked questions
Does F04-6006 fit my Kenworth T800?
Depends on engine and cooling package - the T800 ran different upper hose configurations over the years. Confirm by checking the number molded on your old hose or giving us your VIN, and we'll match it up before you order.
Is this the same as the Gates HE9324?
Yes - F04-6006 and Gates HE9324 cross to the same hose, same shape and ID. Different label, same part.
How do I know if my old hose is this same 2.5" size or something different?
Measure the inside diameter where it clamps onto the radiator neck and thermostat housing, and look for any partial part number stamped or molded into the rubber. If it's worn off, VIN lookup is the safer bet than guessing off the tank size.
Not sure it fits? We check before you pay.
Run your VIN and we’ll match parts to your exact truck, or call the counter — a person who knows trucks verifies fitment by OEM number before the order ships. No wrong-box returns.
More cross-reference guides
Need the part, not just the reading?
Every part below is a Premium Quality aftermarket Direct Replacement with published OEM cross-reference numbers, a 6+ month warranty and same-business-day shipping from Tacoma, WA. Not sure it fits? Run your VIN — or call and a person who knows trucks will verify fitment before you pay.