How to Repair Your BMW Radiator
Is your BMW's radiator damaged? Then here's some much-needed help right at your fingertips. Your car's cooling system is made up of different components, including the thermostat, water pump, and radiator. Once your cooling system starts acting up, running to your nearest dealership might not be necessary if it's a potentially easy fix that you could do on your own (as in a do-it-yourself project). Use this step-by-step guide in order to troubleshoot your BMW radiator in order to resolve the issue without the need of professional assistance.
- Catch basin
- Distilled water
- Replacement hoses
- Replacement radiator
- Ratchet and socket set
What You'll Need
Step 1:Open up your radiator drain plug in order to drain out the coolant inside it. Use your catch basin to catch the coolant. If your radiator lacks a drain plug, then use the lower radiator hose instead by loosening it.
Step 2:Once the radiator has been totally emptied, detach the hoses connected to it by loosening nose clamps and pulling them off of their attachment necks. Also, give yourself more room to work with by by sliding the auxiliary belts off of their pulleys.
Step 3:Take off the radiator shroud and engine cooling fan. This is a vehicle-specific step and this process doesn't cover all engine types or specific component placement. For most BMWs, you'll need a wide box wrench to unbolt the fan from the engine.
Step 4:Set your cooling fan down for the sake of clutch protection. Unbolt the shroud. If clearance or space doesn't allow you to pull the shroud and the fan separately, then it's better for you to pull both of them out together instead.
Step 5:Take off all the remaining attachment points, including mounting clips, bolts, and screws. Get a container like a bowl or a mounting tray to hold these items together so that you won't end up dropping or losing them.
Step 6:Remove the radiator itself from the engine. Any leftover coolant inside it might spill out as this piece of equipment shifts around, so be prepared by wearing a mechanic's apron and putting a catch basin, and some newspapers on the floor.
Step 7:Install your replacement radiator. Handle the new component carefully and gently so that you won't end up damaging the delicate hose necks or cooling fins. Put back the mounting hardware you removed earlier. Use the right torque on them so that you won't end up breaking your newly bought radiator.
Step 8:Reverse the fan and shroud removal process in order to reinstall them unto your radiator. Reattach the cooling hoses for good measure. Make sure the hose clamps are snugly tightened without over-tightening them.
Step 9:Check out the condition of the cooling hoses and consider replacing them. As they age, they tend to become more prone to failure and outright brittle to the touch. If you need to replace one, then you might as well replace them all. Put back the auxiliary and tension belts as well once you're all done with repair and replacement.
Step 10:Slide the belts back to their pulleys and adjust their tension to factory settings by tightening the tension adjustment nuts and bolts. Put in replacement coolant and find the right mix of coolant and distilled water that's perfect for your BMW and your current climate.
The radiator, consisting of the radiator core and plastic tanks, is essential to keep the engine cool and fully functional. Made of high-quality, anti-corrosive aluminum and fiberglass-reinforced polyamide coolant tanks that are highly-resistant to cracking and deformation, the OE-comparable Behr radiator is a direct fit, which makes it quick and easy to install. All-aluminum radiators weigh less, so they don't affect the car's aerodynamics. They also require less design depth and are 100 percent recyclable. Its OE-style mounting brackets and hose connections ensure mounting reliability. Sold individually, the Behr radiator has a 12-month, 12,000-mile limited warranty against defects in material and workmanship.
OEM automotive supplier Nissens introduces its own engine-cooling product, which is guaranteed a 12-month, 12,000-mile limited warranty against defects and workmanship. Sold individually, the OE-comparable Nissens radiator's flat-tube and double-folded fin design offers better engine-cooling capacity than most of its competitors while at the same time it also provides a stronger exterior to resist impact from stones and debris hurling towards the engine. Its direct-fit, OE-style mounting brackets and hose connections make installation easy, with minimal drillings required. The Nissens radiator can be used in environments where corrosion occurs, as it underwent a variety of surface treatments. Ship out time is estimated at one to three business days.
The OE-comparable Metrix brand radiator is made of high-quality corrosion-resistant materials and is a direct fit. Installation of this part is made easy using OE-style mounting brackets and hose connections. Its aluminum core is lightweight and is designed to improve engine-cooling performance and optimum heat transfer; its plastic tanks, on the other hand, have an optimized seal for improved durability against vibration and distortion. It has a 12-month, 12,000-mile limited warranty against defects in material, making it a good choice. Reliability-wise, Metrix radiators can last a few years with no fitment issues, reaching up to 40,000 to 50,000 miles without any problems. They are also required to pass rigorous performance and durability tests for ensured quality. Sold individually, this product is considerably one of the most affordable brands in the market today.