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| articles:m104.98x_motor_swap_in_a_190e [2020/11/16 07:32] – [AC / Fuel Cooling Manifold] john5788 | articles:m104.98x_motor_swap_in_a_190e [2021/12/23 01:22] (current) – [Original M103 Engine Removal] john5788 | ||
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| ==== AC / Fuel Cooling Manifold ==== | ==== AC / Fuel Cooling Manifold ==== | ||
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| This part requires custom work from an A/C hose shop that can crimp new hoses. | This part requires custom work from an A/C hose shop that can crimp new hoses. | ||
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| A solution to fix this is to use the M104 A/C manifold (104 230 04 56 is NLA, aftermarket solution: Four Seasons 55586) and have both hoses custom made. The upper hose needs to be simply matched to the original length of the 190E part and the lower hose comes out to around 20cm (I would try 19.5cm for an easier fit. 20cm is slightly too long). An additional option is to have a high pressure diagnostic port installed as well since this port will be lost from switching to the M104 A/C manifold. | A solution to fix this is to use the M104 A/C manifold (104 230 04 56 is NLA, aftermarket solution: Four Seasons 55586) and have both hoses custom made. The upper hose needs to be simply matched to the original length of the 190E part and the lower hose comes out to around 20cm (I would try 19.5cm for an easier fit. 20cm is slightly too long). An additional option is to have a high pressure diagnostic port installed as well since this port will be lost from switching to the M104 A/C manifold. | ||
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| ==== Alternator ==== | ==== Alternator ==== | ||
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| + | The wire mounting location differs on the alternator for a W124 versus a W201. The alternator for the W124 will work, but the wires will be kinked in an unnatural position. You will need to reclock the alternator by removing the screws holding the 2 halves of the alternator together and turning them to match how a 190E alternator looks. | ||
| ==== Wiring Harness ==== | ==== Wiring Harness ==== | ||
| + | The M104.98x now has an updated version of CIS that is not directly compatible with the older version. Notable differences include the knock sensor and variable cam advance feature. There are two approaches to getting the wiring completed for this swap. | ||
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| + | === Borrow existing wiring from late model M103 motor === | ||
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| + | - Connect without modifications | ||
| + | - Connect 2 plugs at EZL | ||
| + | - Connect single pin connector by ignition coil | ||
| + | - Connect X92 ground wire | ||
| + | - Connect AC compressor wires (blue/ | ||
| + | - Connect IACV | ||
| + | - Connect throttle position wires (brown/ | ||
| + | - Connect common ground at intake manifold. Include wire from ground at ignition coil bracket. | ||
| + | - The following require some modification | ||
| + | - Open the idle microswitch connector plug and reverse the orientation of the wire. | ||
| + | - CIS 4 prong sensor is now located at the water pump so this needs to be lengthened. | ||
| + | - Pin 1 - Green/ white | ||
| + | - Pin 2 - Green / red | ||
| + | - Pin 3 - Brown | ||
| + | - Pin 4 - Brown / white | ||
| + | - Lengthen and connect the 3 prong connector under fuel distributor for airflow potentiometer (brown/ | ||
| + | - Lengthen and connect the 1 prong coolant temperature sensor (green) | ||
| + | - Lengthen and connect the 2 prong coolant temperature sensor (brown, green) | ||
| + | - Lengthen and connect cold start valve wire | ||
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| + | === Complete wiring harness transplant === | ||
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| + | //Not yet written// | ||
| ==== Fuel Supply Hose ==== | ==== Fuel Supply Hose ==== | ||
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| + | In order to use the M104 CIS intake box, the supply line must be swapped. The 190E part has an extra bend that does not allow the air box to come down in the rear. | ||
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