Mishimoto Silicone Radiator Hose Kit – 1989-1998 Nissan 240SX (S13/S14) w/ KA24DE | Black

Replace your aging factory rubber coolant hoses with the Mishimoto Silicone Radiator Hose Kit — a complete, OEM-fit silicone hose set engineered for the 1989–1998 Nissan 240SX (S13 and S14) with KA24DE engine. Constructed from dual-layer high-grade silicone with heat-resistant embedded fibers, Mishimoto’s silicone hoses provide superior heat reduction, increased pressure tolerance, and long-term durability that factory rubber hoses simply cannot match. In black for a clean, purposeful appearance under the hood.

Key Features:

• Dual-layer silicone construction — high-grade silicone outer layer combined with heat-resistant embedded fiber reinforcement for superior strength and pressure tolerance
• OEM replacement fit — direct replacement for factory coolant hoses; no cutting or modification required
• Black finish — clean, purposeful appearance that complements any engine bay build
• Complete kit — includes all radiator hoses required for a full coolant hose replacement on the KA24DE
• KA24DE specific — engineered for the 1989–1998 Nissan 240SX (S13 and S14) with KA24DE engine
• Mishimoto quality — one of the most trusted names in performance cooling components

Performance Benefits:

• Superior Heat Resistance: High-grade silicone and heat-resistant embedded fibers provide significantly better thermal resistance than factory rubber hoses — maintaining flexibility and integrity at elevated coolant temperatures that cause rubber hoses to harden, crack, and fail
• Increased Pressure Tolerance: Dual-layer reinforced construction handles higher coolant system pressures without ballooning or collapsing — critical for performance builds where coolant temperatures and pressures can exceed factory operating parameters
• Long-Term Durability: Silicone does not degrade from heat, ozone, or coolant exposure the way rubber does — Mishimoto silicone hoses outlast factory rubber hoses significantly, eliminating the coolant leak risk of aging rubber
• Efficient Heat Reduction: Silicone’s lower thermal conductivity reduces heat transfer from the coolant to the surrounding engine bay, contributing to a slightly cooler underhood environment
• Reliability Upgrade: Replacing 30+ year old factory rubber hoses with fresh silicone eliminates one of the most common causes of coolant loss and overheating on aging S13/S14 platforms

Specifications:

• Brand: Mishimoto
• Part Number: MMHOSE-240SX-89KABK
• Material: Dual-layer high-grade silicone with heat-resistant embedded fiber reinforcement
• Colour: Black
• Fitment: Direct OEM replacement
• Application: 1989–1998 Nissan 240SX (S13/S14) — KA24DE engine

Fitment Information:

• 1989–1994 Nissan 240SX (S13) — KA24DE engine
• 1995–1998 Nissan 240SX (S14) — KA24DE engine
• Note: This kit is for KA24DE-equipped 240SX only — not for SR20DET or other engine swap applications. Verify your engine before ordering.
• SR20DET / Engine Swap Note: If your 240SX has been swapped to an SR20DET or other engine, verify hose fitment requirements for your specific swap configuration before ordering.
• Installation: Direct OEM replacement — no cutting or modification required

What’s Included:

• Mishimoto silicone radiator hose kit – black, KA24DE (MMHOSE-240SX-89KABK)
• All hoses required for a complete radiator hose replacement
• Installation instructions

Installation Notes:

• Drain and flush the cooling system before installation
• Inspect all hose clamps and replace if corroded or weakened
• Use a quality coolant appropriate for aluminum cooling systems if running an aluminum radiator
• Ensure all hose connections are fully seated and clamps are torqued to specification
• Bleed the cooling system thoroughly after installation to remove air pockets
• Check for leaks after the first heat cycle

Why Replace Factory Rubber Hoses?

The factory coolant hoses on a 1989–1998 Nissan 240SX are now 25–35 years old. Rubber degrades over time from heat cycling, ozone exposure, and coolant contact — hardening, cracking, and eventually failing. A burst or leaking coolant hose can cause rapid coolant loss and engine overheating in minutes, potentially causing catastrophic engine damage. On a platform as popular for performance driving as the S13/S14, where coolant temperatures can run higher than stock during spirited driving or track use, the risk of a rubber hose failure is even more significant. Mishimoto’s silicone hose kit eliminates this risk entirely — replacing aging rubber with a material that is inherently more resistant to heat, pressure, and degradation.

Silicone vs. Rubber Hoses:

Factory rubber coolant hoses are designed for cost and adequate performance under normal operating conditions. Silicone hoses offer several meaningful advantages for performance applications: silicone maintains its flexibility and integrity at higher temperatures than rubber, resists ozone and UV degradation that causes rubber to crack, handles higher coolant pressures without ballooning, and has a significantly longer service life. The dual-layer construction of Mishimoto’s hoses adds embedded fiber reinforcement for additional pressure resistance — making them suitable for performance builds where coolant system pressures may exceed factory parameters.

Why Mishimoto?

Mishimoto is one of the most recognized names in performance cooling components, with a comprehensive lineup of aluminum radiators, intercoolers, silicone hose kits, and cooling accessories for import and domestic performance vehicles. Their 240SX silicone hose kit is engineered specifically for the S13/S14 KA24DE platform — not a universal fit — ensuring correct hose dimensions, proper connection fitment, and compatibility with the factory cooling system layout.

Perfect For:

• 1989–1998 Nissan 240SX (S13/S14) KA24DE owners replacing aging or failed factory rubber coolant hoses
• S13/S14 builds pairing with a Mishimoto aluminum radiator for a complete cooling system upgrade
• Track day and drift builds where cooling system reliability is critical
• Engine rebuilds and restoration projects refreshing the entire cooling system
• Anyone building a reliable, performance-focused 240SX who wants long-term cooling system durability

Pro Tip: Pair with the Mishimoto 240SX aluminum radiator (MMRAD-240-89KA) and aluminum fan shroud for a complete cooling system upgrade. Fresh silicone hoses on a 30-year-old factory radiator still leaves the weakest link in place — a complete cooling system refresh delivers the most reliable result.

Note: KA24DE fitment only. If your 240SX has been swapped to an SR20DET or other engine, verify hose fitment requirements for your specific swap before ordering.