Complete 13-Piece Silicone Cooling Hose Kit for BMW M3 E30 (1986-1991) - REDOX

The cooling system of your BMW M3 E30's legendary S14 engine represents a critical component for maintaining performance and longevity of this exceptional powerplant. Original natural rubber hoses, designed for economical mass production, exhibit limited mechanical properties causing excessive expansion, cracking and premature failure, particularly on vehicles exceeding 30 years of age.

REDOX Kit Technical Specifications

Our 13-piece VMQ silicone hose kit completely replaces the BMW M3 E30 engine cooling circuit, including all radiator hoses, water pump connections, thermostat lines, expansion tank hoses and cabin heating circuit. Each hose features high-temperature silicone construction with 4mm reinforced 3-ply thickness, delivering exceptional resistance to extreme temperatures from -50°C to +180°C and cooling system pressure.

VMQ silicone composition maintains stable elasticity over time, unlike original EPDM rubber which hardens and cracks with age. This technical material withstands thermal stress from the S14 engine without degradation, particularly demanding with operating speeds reaching 7250 rpm.

BMW M3 E30 Applications and Compatibility

This kit fits perfectly on BMW M3 E30 models produced between 1986 and 1991, equipped with the 2.3-litre S14B23 engine developing between 192 and 220 horsepower depending on version, as well as rare 1990 Sport Evolution examples featuring the 2.5-litre S14B25 engine with 238 horsepower. Compatibility extends to the Italian market 320is version equipped with the same S14 block.

The kit suits both coupe configurations (1986-1991 production) and convertible variants (1988-1991 production), including special editions Ravaglia, Cecotto, Evolution I, Evolution II and Sport Evolution. All S14 engine variants benefit from this reinforced cooling solution.

Replaced BMW OEM References

This REDOX kit replaces the following original BMW part numbers: 11531309668 (upper radiator hose), 11531309680 (lower radiator hose), 11531309669 (water pump hose), 11531309670 (coolant pipe hose), 11531266472 (auxiliary water pump hose), 11531309667 and 17112225399 (expansion tank hoses), 64211370807, 64211381541, 64211374908 and 64218367834 (heating circuit hoses), 13311308897 and 17121712736 (engine bleed hoses).

The multiplication of original references demonstrates the S14 cooling circuit complexity, developed to meet motorsport competition requirements whilst maintaining road reliability. Original rubber hoses require regular replacement to avoid engine overheating risks.

REDOX Permanent Stock Advantage and Fast Delivery

REDOX maintains permanent stock of this complete BMW M3 E30 kit, enabling same-day dispatch for orders placed before 5pm. Our European warehouse guarantees GLS delivery within 24 to 48 hours to France, Germany, Spain, Italy and Benelux countries.

This immediate availability eliminates typical supply delays for specific E30 M3 parts, particularly for references becoming scarce in the BMW original parts market. Your vehicle quickly regains reliable cooling circuit operation, essential for preserving the exceptional S14 engine mechanics.

REDOX lifetime warranty covers the entire kit against manufacturing defects or premature silicone degradation. This assurance demonstrates our absolute confidence in our high-performance silicone hoses quality, proven over 15 years in demanding motorsport applications.

Main Technical Characteristics

Material: VMQ silicone (methylvinyl polysiloxane) high-temperature grade
Construction: 3-ply reinforcement with internal textile armour
Wall thickness: 4mm throughout entire length
Temperature resistance: -50°C to +180°C continuous operation
Pressure resistance: Compatible with BMW cooling circuit (1.4 bar)
Number of pieces: 13 complete hoses
Clamps: Included stainless steel worm-drive type for each hose
Available colours: Motorsport blue, technical black, racing red
Warranty: Lifetime against manufacturing defects and aging
Design origin: Motorsport competition circuit development

Installation and Recommendations

Installation requires complete disassembly of existing cooling system after coolant drainage. Take advantage of this intervention to also replace thermostat, expansion tank cap and verify water pump condition. Fresh BMW-approved coolant must be used during refilling.

Clamps included in the kit must be positioned with progressive tightening torque to avoid crushing the silicone. Careful circuit bleeding eliminates any air pockets capable of causing localized overheating. Initial road test verifies perfect sealing of each connection.

REDOX silicone hoses require no particular maintenance. During periodic coolant changes, simply verify clamp tightness and absence of leak traces. Exceptional VMQ silicone resistance guarantees durability far exceeding your BMW M3 E30's remaining service life.

FAQ Section

What difference exists between REDOX silicone hoses and original BMW M3 E30 rubber hoses?
REDOX silicone hoses utilise VMQ high-performance material maintaining elasticity and resistance despite repeated thermal cycles. Original EPDM rubber progressively hardens, causing cracks and ruptures after several years of use. Silicone also withstands more extreme temperatures without mechanical property degradation.

Does this kit fit 1990 BMW M3 E30 Sport Evolution models with 2.5-litre engine?
Yes, this kit fits perfectly on Sport Evolution models equipped with the 2467 cc S14B25 engine producing 238 horsepower. The cooling circuit remains identical between all S14 engine versions, only displacement varies slightly. All 600 Sport Evolution examples benefit from this same reinforced hose solution.

Are the supplied clamps suitable for silicone hoses?
Clamps included in the REDOX kit feature smooth interior surface specifically designed for silicone hoses, eliminating any cutting or material damage risk during tightening. We advise against using low-grade serrated band clamps which may deteriorate silicone.

Can I keep my original hoses in good condition and replace only failed hoses?
Although technically possible, we strongly recommend complete circuit replacement. Original rubber hoses age simultaneously and an apparently healthy hose may rupture weeks after partial replacement. Complete kit guarantees total peace of mind and avoids multiple costly time-consuming interventions.

Does silicone resist modern glycol-based coolants?
VMQ silicone offers excellent chemical compatibility with all ethylene or propylene glycol coolants, including anticorrosion and antifreeze additives. Unlike certain rubbers which swell upon contact with concentrated glycol, silicone maintains dimensions and mechanical properties without alteration.

What delivery time for this complete kit to mainland France?
REDOX ships this kit within maximum 24 working hours from our warehouse. GLS delivery typically occurs 24 to 48 hours after dispatch to mainland France, Germany, Belgium, Netherlands and Luxembourg. Other European destinations receive orders within 72 hours.

Do REDOX hoses modify engine bay appearance?
Blue, black or red colours indeed bring sporty aesthetic touch to engine bay. Blue recalls historic BMW Motorsport shades, red evokes motorsport competition, whilst black offers technical discretion. Slightly superior 4mm silicone hose thickness visually reinforces installation robustness.

Must clamps be replaced during future cooling circuit interventions?
No, supplied stainless clamps can be loosened then retightened during maintenance interventions without performance loss. Simply ensure not exceeding recommended tightening torque which could crush silicone. Clamp replacement becomes necessary only in case of advanced corrosion or deformation.