PRODUCT DETAILS
Honda OEM Coolant Bypass Inlet Hose - K24A1 Engine
You're doing a coolant flush on your CR-V and you're looking at the bypass inlet hose sitting there between the head and thermostat case. The rubber's cracked. It's soft. It's swollen. After 15+ years of heat cycling that hose has taken a beating. The rubber gets brittle. It cracks. Coolant starts weeping out. You're topping off the overflow tank every few days wondering where the coolant's going. You're not seeing a puddle under the car. You're just noticing the level keeps dropping. That's the bypass hose leaking slowly and you probably didn't even know it was the problem. This is genuine Honda OEM part 19504-PPA-A00. It's the correct bypass inlet hose for the K24A1. Replace it when you're doing coolant service. You're already in there draining coolant and pulling hoses anyway. Don't ignore the bypass hose. A cracked hose lets air into the cooling system. Air bubbles create hot spots in the engine. Hot spots mean overheating. Replace the hose.
Here's What Happens When the Bypass Hose Fails
The bypass inlet hose runs from the cylinder head to the thermostat case. When your engine's cold the thermostat stays closed. Coolant can't flow to the radiator yet so it bypasses through this hose and circulates inside the engine to warm up faster. When the engine gets hot the thermostat opens and coolant flows to the radiator. The bypass hose is constantly dealing with temperature swings. Hot coolant one minute. Cooler coolant the next. Heating up. Cooling down. The rubber's flexing and compressing thousands of times over 15 years. The rubber loses elasticity. It gets soft inside. It gets brittle outside. Cracks develop. Eventually the hose splits or develops a pinhole leak. Coolant weeps out slowly. You're not getting a huge puddle under the car. You're getting a slow seep that leaves white crusty residue around the fittings. The overflow tank stays mysteriously low. You keep topping it off. You're wondering where the coolant's disappearing to. The bypass hose is leaking and you didn't even know it was a problem. Meanwhile air's getting into the cooling system. Air bubbles create hot spots. The engine runs hot in those spots. You're getting high temperatures and you can't figure out why. The thermostat reads normal but you're feeling heat coming through the dash. That's what a failing bypass hose does. Don't ignore it.
Molded to Fit Right - No Guessing
This is molded rubber shaped exactly like the factory hose. Right bends. Right angles. When you bolt it on it fits perfectly. No kinks. No fighting the hose onto the fittings. No stretching generic straight hose and hoping it conforms to what you actually need. The molded shape means less stress on the rubber. Less stress means the hose lasts longer. You're not creating weak points by forcing the hose into weird positions. You're not twisting it in directions that make it fail early. It just sits there doing its job without you fighting it. That's what a molded hose should do. Fit right the first time.
Replace It While You're In There
If you're flushing the cooling system you're already draining coolant and pulling hoses off. The bypass inlet hose is sitting right there. Pull it off. Look at it. If it's cracked or soft or discolored replace it now. You're already in there. The labor's done. A new hose is cheap compared to the work you're already paying for. We've seen people skip the bypass hose and do the coolant service anyway. Six months later the bypass hose is leaking and they're back under the car chasing a cooling problem that shouldn't exist. Don't be that person. If you're servicing the cooling system replace the bypass hose. If you're doing an engine refresh replace the bypass hose. If you're tracking down a mystery high temp problem and you haven't looked at the bypass hose, look at it now. If it's got any cracks or the rubber's soft, replace it. Don't leave an old bypass hose in a freshened cooling system. Do it once and be done.
Honda OEM - It Works
This is genuine Honda OEM part 19504-PPA-A00. It's the bypass inlet hose Honda installs at the factory. The rubber compound's engineered for K-series cooling systems. The inner diameter matches your fittings. The wall thickness handles the pressure. It fits right. Aftermarket bypass hoses are cheaper. Some are fine. Some are garbage. We've seen cheap bypass hoses that are too soft and they collapse under pressure. We've seen hoses with wrong inner diameters that don't fit the fittings properly. We've seen aftermarket hoses that crack after a year because the rubber isn't heat-resistant enough for K-series engines. The bypass inlet hose is critical cooling system plumbing. It's moving hot pressurized coolant. It's not where you buy a generic hose from the auto parts store and hope it works. Buy the Honda hose. It fits. It lasts. You install it once and stop thinking about it. That's exactly what you want.
What You Get
- Honda OEM coolant bypass inlet hose - part number 19504-PPA-A00
- Fits K24A1 engine (CR-V)
- Genuine Honda molded rubber hose
- Direct fit - right bends, no kinks
- One hose per order
Fits This Car
- 2002-2006 Honda CR-V (K24A1 engine)
Note: Coolant bypass inlet hose for K24A1 engine. Genuine Honda OEM part 19504-PPA-A00. Molded rubber hose runs from cylinder head to thermostat case. Fits 2002-2006 Honda CR-V. Failure symptoms: cracked rubber, soft rubber, swollen inner surface, slow seep with white crusty residue around fittings, low overflow tank, air in cooling system causing hot spots, mystery high temps. Replace during coolant flush service or engine refresh. Don't leave old bypass hose in freshened cooling system. One hose per order.