Performance Radiator for BMW 318i 318is 318ti Z3 (1991-2000) 1.9L L4
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High-Capacity Performance Radiator for 1991-2000 BMW 3 Series, Z3
What it is for: This 3-row all-aluminum radiator and electric fan combination replaces the restrictive OEM cooling system to lower coolant temperatures and prevent overheating under high engine load.
The Stock E36 Cooling System Weakness
The factory BMW E36 and Z3 cooling systems are notorious for thermal degradation over time. The original equipment utilizes plastic end tanks crimped to a thin aluminum core. After years of heat cycling, the plastic becomes brittle, leading to micro-fractures, coolant leaks, and catastrophic failures at the upper radiator neck. Furthermore, the standard single-row core lacks the necessary fluid capacity and surface area to effectively dissipate heat during spirited driving or heavy traffic, inevitably leading to engine heat soak and compromised performance.
The Engineering Solution
This heavy-duty performance radiator eliminates the inherent flaws of the OEM design by utilizing a fully TIG-welded, all-aluminum construction. Featuring a robust 1.65-inch thick, 3-row core design, it increases total cooling capacity by approximately 30 percent compared to the standard factory unit. The 17.24" x 17.32" core maximizes thermal exchange efficiency, ensuring stable operating temperatures even under sustained high RPMs. Paired with a 16-inch, 10-blade electric puller fan generating over 850 m³/h of airflow at 2250 RPM, this system guarantees optimal airflow dynamics through the fins, effectively mitigating heat soak in both daily commuting and performance applications.
Technical Specifications
| Fitment | 1991-2000 BMW 3 Series, Z3 |
| Engine / Chassis | M42, M44 (L4) / E36, E36/5, E36/7 |
| Stock Output | 138 hp / 133 lb-ft (Approx) |
| Part Number | N/A |
Compatibility
- 1991-2000 BMW 318i (Manual Transmission)
- 1991-2000 BMW 318is (Manual Transmission)
- 1991-2000 BMW 318ti (Manual Transmission)
- 1991-2000 BMW Z3 1.9i L4 (Manual Transmission)
- 1991-2000 BMW Z3 2.0i L6 (Manual Transmission)
The BMW Precision Standard
Engineered for proper fitment in the E36 engine bay, this direct-replacement cooling upgrade maintains standard mounting geometry while providing superior thermal management, keeping your European powerplant running at peak efficiency without triggering dashboard warnings.
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