Step 1: Remove the following fasteners and lift the front bulk head panel up and out. * Some 1987 E30s are equipped with fuel-cooling lines that run across the bulkhead and connect to the A/C lines. Neither the metal lines nor the rubber hoses need to be removed. Simply release the fuel-cooling lines from...
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Aiming the washer jets by eye usually ends up with the water landing too high, too low, or blowing clean over the roof once you are moving. BMW gives eight dimensions for it under procedure 61 71 504 – they locate four spray targets on the glass, two per jet. The method: Transfer distances...
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    Print them on their side: This matters more than anything else here. Do not print these standing up. A 3D print is always weakest at the layer boundaries. Print a pin upright and every layer line runs straight across the shaft, at 90 degrees to the load. Laid on its side, the...
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I’ve found the E30 blower-motor retaining clip to be one of the most counterintuitive—and least documented—parts of the job....
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Binary comparison of Bosch Motronic 1.3 173 and 525 ECUs, including coolant enrichment, cranking fuel and ignition, and every...
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A practical guide to the full E30 OBC: its displays, sensor inputs, trip calculations, speed warning, temperature alert, CODE...
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