Silicone Hose Kit for Dodge Ram (1988-1993) 5.9L

High-Temp Silicone Radiator Hose Kit for 1988-1993 Dodge Ram

What it Does: The Silicone Hose Kit replaces the degraded factory rubber coolant lines on the 1988-1993 Dodge Ram to eliminate cooling system ruptures and handle higher thermal and pressure loads.

The Stock Dodge Ram EPDM Degradation Problem

Factory coolant hoses on the First-Gen D/W Series Dodge Ram are manufactured from standard vulcanized EPDM rubber. Over decades of heat cycling, high under-hood temperatures from the Chrysler LA 360 / 5.9L powerplant bake these hoses from the inside out. This leads to electrochemical degradation (ECD), sidewall micro-cracking, internal delamination, and embrittlement. Under towing stress or peak operating temperatures, softened OEM rubber lines expand excessively, balloon under standard cooling circuit pressures (16 psi), and fail catastrophically at the radiator neck or water pump junction.

The Engineering Solution

Engineered as a direct-fit replacement, this performance coolant hose set is manufactured from high-tensile, multi-ply polyester-reinforced silicone. Silicone provides an operational temperature ceiling ranging from -65°F to 350°F without hardening, drying, or ozone cracking. The multi-ply structural matrix eliminates hose expansion under thermal saturation, maintaining consistent coolant velocity and heat dissipation throughout the cooling circuit. A calibrated inner bore minimizes fluid boundary friction to optimize coolant circulation between the water pump, cylinder heads, and radiator core.

Technical Specifications

Compatibility

• 1988-1993 Dodge Ram D150 / W150 5.9L
• 1988-1993 Dodge Ram D250 / W250 5.9L
• 1988-1993 Dodge Ram D350 / W350 5.9L
• 1988-1993 Dodge Ramcharger 5.9L

Frequently Asked Questions

Does this fit the First-Gen D/W Series Ram?
Yes, this is a direct-fit replacement kit designed specifically for 1988-1993 First-Gen D/W Series trucks running the 5.9L engine.

Can standard worm-gear hose clamps cut into these silicone hoses?
Yes, lined silicone-safe hose clamps or embossed T-bolt clamps are strongly recommended to prevent soft silicone shearing under high torque loads.

The Dodge Durability Standard

First-generation Ram trucks are built for severe-duty hauling and work-site abuse. Upgrading to heavy-duty multi-ply silicone ensures your cooling system withstands sustained heavy towing without risk of roadside burst failures.