You must test the belts in your BMW a minimum of each three,000 miles. Within the case of the fan belt, substitute is required when the belt exhibits indicators of tearing, fraying or cracking. Cracking is normally positioned on the within of the belt and might trigger loud noises within the automobile. It’s simple to interchange the fan belt in your BMW and set up a brand new one. The principle concern is dealing with the fan, however putting in a brand new fan merely requires persistence, instruments and a focus to element.
BMW Fan Belt Installation Instructions
Remove the engine cowl beneath your BMW with a Phillips head screwdriver. There are 9 screws that can should be loosened.
Place the water pump pulley software on the left aspect of the engine over the water pump pulley hex head. With the instrument on the hex head, flip the fan nut clockwise to loosen it with a big wrench. The particular instrument for the water pulley is required with a view to counteract the torque from the wrench. Watch out with the fan blades to keep away from damaging them. If they’re broken throughout reassembly, they will trigger the fan to blow up whereas the engine is operating.
Loosen the nut holding the fan to the engine then take away the fan by reducing it out from beneath the automotive. Find the primary serpentine belt tensioner the place the fan was beforehand. Use a thirteen mm socket wrench and extension to loosen the 2 bolts positioned to the best of the belt tensioner spring. When you loosen these bolts, the belt stress might be relieved, indicated by a popping noise. Remove the fan belt from the engine by slowly pulling it out.
Arrange the belt tensioner by pre-tightening the thirteen mm bolt to choose up stress however don’t tighten it to the extent that the tensioner can’t be turned. Use a 17 mm socket to show the massive hex clockwise till the ten mm bolt clicks into its slot. As soon as this happens, tighten the thirteen mm bolt as a lot as doable.
Install the brand new fan belt by mendacity below the front of your BMW and attaching the belt in order that the entire pulleys are aligned with the grooves of the pulleys within the automotive. It is best to have the ability to see the big outdoors lips of the ribbed pulleys if the belt is put in correctly. If the belt seems to be on the sting of a pulley and will fall off, you will have to reposition it.
Use a half of-inch ratchet with a 3-inch extension and 17 mm socket to show the nut of the massive belt tensioner. Use a 3/8-inch ratchet with a 6-inch extension and thirteen mm socket to safe the tensioner as soon as it has been lifted again into its correct place. Tighten the 13 mm bolt connected to the 17 mm nut to take up the slack however watch out to not tighten this bolt to the purpose of inhibiting rotation. This bolt would be the increased bolt, with the opposite 13 mm bolt beneath it. Flip the 17 mm nut connected to the 13 mm bolt you simply tightened. Flip this nut counterclockwise till tight. End tightening the 13 mm bolt then tighten the second thirteen mm bolt.
Reinstall the fan by reversing the removing course of, inserting it via the underside of the automotive. Don’t apply extreme drive to the blades of the fan. Return the fan to its unique location on the water pump pulley then fastidiously flip the blades to get it began on the threads. Use the wrench to tighten the nut. Use the particular instrument for the water pump pulley on the alternative facet of the pulley, tightening the nut by pushing it counterclockwise with the wrench. It would really feel as in case you are pushing the nut backwards as a result of the fan makes use of left-handed threads.
Verify the situation of the fan, be certain that the fan belt is on the pulleys and the belt has the correct quantity of pressure. Begin the engine so as to check for noises however do not stand too near the fan. Within the occasion that it explodes, you can be placing your self in critical hazard. If you’re assured that all the pieces is in working order in your BMW, substitute the engine cowl beneath the automotive and tighten the 9 screws.
[taken from ehow.com]
